Cactus Family

Opuntia leptocaulis De Candolle Mem Mus Hist Nat Paris 17 118 1828

Dyck. 360. 1834. Opuntia gracilis Pfeiffer, Enum. Cact. 172. 1837. Opuntiafragilis frutescens Engelmann, Bost. Journ. Nat. Hist. 5 245. 1845. Opuntia virgata Link and Otto in Forster, Handb. Cact. 506. 1846. Opuntia vaginata Engelmann in Wislizenus, Mem. Tour North. Mex. 100. 1848. Opuntia frutescens Engelmann, Bost. Journ. Nat. Hist. 6 208. i85o. Opuntia frutescens brevispina Engelmann, Proc. Amer. Acad. 3 309. 1856. Opuntia frutescens longispina Engelmann,...

Opuntia lanceolata Haworth Syn Pl Succ 192 1812

Nat. 188. 1803. Cactus elongatus Willdenow, Enum. Pl. Suppl. 34. 1813. Opuntia elongata Haworth, Suppl. Pl. Succ. 81. 1819. Plants tall, much branched joints elongated, 3.5 cm. long, dull green, somewhat tuberculate areoles distant, small spines if present few, small, white, 1 cm. long or less glochids yellow flowers large, yellow. Distribution Known only in cultivation. We have combined O. lanceolata and O. elongata, although there is a possibility of their...

Opuntia robusta Wendland in Pfeiffer

Cactus Alto Ereto Sem Flor

Gen. Nov. Sp. Opuntia larreyi Weber in Coulter, Contr. U. S. Opuntia gorda Griffiths, Monatsschr. Kakteenk. Often erect, sometimes 5 meters high, usually much branched joints orbicular to oblong, 20 to 25 cm. long by 10 to 12.5 cm. broad, very thick, bluish green, glaucous leaves 4 mm. long, reddish, acute spines 8 to 12, stout, very diverse, brown or yellowish at base, white above, up to 5 cm. long, but often wanting on greenhouse specimens flowers 5 cm. broad,...

Opuntia Imbricata

Joints very readily detached, freely falling 30. O. fulgida Joints not very readily detached, persistent. Spines brown or reddish, at least at base. Branches slender fruit not proliferous 31. O. spinosior Branches stout fruit proliferous 32. O. prolifera Spines white petals greenish yellow, 1 cm. long or less 33. O. alcahes Spines yellow petals red, 2 cm. long 34. O. burrageana 30. Opuntia fulgida Engelmann, Proc. Amer. Acad. 3 306. Opuntia mamillata Schott in Engelmann, Proc. Amer. Acad....

Opuntia polyacantha Haworth Suppl Pl Succ 82 1819

Happy Holiday Elegant

Pl. 1 296. 1818. Not Willdenow. 1813. Opuntia media Haworth, Suppl. Pl. Succ. 82. 1819. Opuntia missouriensis De Candolle, Prodr. 3 472. 1828. Opuntia splendens Pfeiffer, Enum. Cact. 159. 1837. Opuntia missouriensis albispina Engelmann and Bigelow, Proc. Amer. Acad. 3 300. 1856. Opuntia missouriensis microsperma Engelmann and Bigelow, Proc. Amer. Acad. 3 300. 1856. Not O. rafinesquei microsperma Engelmann, Proc. Amer. Acad. 3 295. 1856. Opuntia missouriensisplatycarpa...

Opuntia pittieri sp nov

Plant up to 5 meters high, with a rather definite cylindric spiny trunk joints large, 25 to 50 cm. long, 2 to 4 times as long as wide, narrowly oblong, green leaves subulate, with purple tips wool in young areoles dark brown to purple areoles elevated, rather large, 2 to 3 cm. apart spines 3 to 6, slightly spreading, acicular, white, the longest 2 to 2.5 cm. long glochids tardily developing, few, often wanting flowers deep orange, turning to scarlet ovary nearly globular, more or less spiny,...

Textfigures

Hedge of Pereskia pereskia 7 2. Tree of Pereskia autumnalis 11 3. Branches of Pereskia autumnalis 12 4. Branch of Pereskia lychnidiflora 12 5. Leafy branch of Pereskia nicoyana 13 6. Branch of Pereskia zehntneri 13 7. Cultivated plant of Pereskia zehntneri . 14 8. Herbarium specimen of Pereskia moorei 15 9. Tree of Pereskia guamacho 15 10. Flowering branch of Pereskia guamacho 16 11. Leafy branch and flower of Pereskia 12. Branch and fruit of Pereskia bleo 18 13. Fruit of Pereskia...

Opuntia Skottsbergii

Opuntia floccosa Salm-Dyck, Allg. Gartenz. 13 388. 1845. Opuntia senilis Roezl in Morren, Belg. Hort. 24 39. 1874. Opuntia floccosa denudata Weber, Dict. Hort. Bois 897. 1898. Opuntia hempeliana Schumann, Gesamtb. Kakteen 690. 1898. Plant growing in clumps or low mounds sometimes 1 to 2 meters in diameter, with hundreds of short, erect branches joints oblong, 5 to 10 cm. long, usually hidden under a mass of long white hairs coming from the areoles spines usually...

Key to Species

Stems, ovary, and often the leaves more or less pubescent. Normal leaves long-acuminate, narrow, with narrow cuneate bases 1. P. velutina Normal leaves abruptly pointed, somewhat cuneate at base 2. P. diguetii Leaves, at least some of them, not much longer than broad. Fruit without leaves, at least so P. opuntiaeflora Fruit with leaves subtending the areoles. Areoles white, with few glochids or none. Leaves orbicular or nearly so, rounded or P. rotundifolia Leaves, at least the upper ones,...

Opuntia vulgaris Miller Gard Dict ed 8 No 1 1768

Pl. Suppl. 33. 1813. Opuntia monacantha Haworth, Suppl. Pl. Succ. 81. 1819. Cactus urumbeba Vellozo, Fl. Flum. 207. 1825. Cactus indicus Roxburgh, Fl. Indica 2 475. 1832. Cactus chinensis Roxburgh, Fl. Indica 2 476. 1832. Opuntia monacantha gracilior Lemaire, Cact. Gen. Nov. Sp. 68. 1839. Opuntia umbrella Steudel, Nom. ed. 2. 2 222. 1841. Opuntia roxburghiana Voigt, Hort. Suburb. Calcutt. 62. 1845. Opuntia monacantha deflexa Salm-Dyck, Cact. Hort. Dyck. 1849....

Pereskia bleo HBK De Candolle Prodr 3 75 1828

Pereskia Bleo

Cactus bleo Humboldt, Bonpland, and Kunth, Nov. Gen. et Sp. 6 69. 1823. Pereskiapanamensis Weber, Dict. Hort. Bois 739. 1898. A tree, sometimes 7 meters high trunk 10 cm. in diameter or less, when old becoming naked, but young shoots often bear large fascicles of spines (sometimes 25 or more) young branches red, leafy, its spines in fascicles of 5 and 6, but young shoots often bear but 1 to 4, black, acicular, up to 2.5 cm. long leaves thin, oblong to oblanceolate, 16 to 21 cm. long, 4 to 5.5...

Opuntia imbricata Haworth De Candolle Prodr 3 471 1828

Succ. 70. 1821. Cactus cylindricus James, Cat. 182. 1825. Not Lamarck. 1783. Cactus bleo Torrey, Ann. Lyc. N. Y. 2 202. 1828. Not Humboldt, Bonpland, and Kunth. 1823. Opuntia rosea De Candolle, Prodr. 3 471. 1828. Opuntia decipiens De Candolle, M m. Mus. Hist. Nat. Paris 17 118. 1828. Opuntia exuviata De Candolle, M m. Mus. Hist. Nat. Paris 17 118. 1828. Opuntia exuviata angustior De Candolle, M m. Mus. Hist. Nat. Paris 17 118. 1828. Opuntia exuviata...

Tribe 1 Pereskieae

Stems and foliage as in other dicotyledonous plants inflorescence in some species compound flowers more or less stalked, their parts all distinct glochids wanting ovule with short funicle testa of seed thin, brittle. The genus Pereskia, the only representative of this tribe, is, on account of its similarity to other woody flowering plants, considered the nearest cactus relative to the other families, but this relationship is in all cases remote. The nearest generic relatives of Pereskia in the...

Tribe 2 Opuntieae

Plants usually very fleshy, never epiphytic, branched (usually much branched), one to many-jointed joints diverse in structure, terete, compressed, or much flattened, with irregularly scattered areoles, ribless, except one species leaves usually caducous, but in some species more or less persistent, small or minute, subulate or cylindric, in one genus broad and flat areoles usually glochidiferous (except in Maihuenia in Grusonia only those of the ovary), mostly spine-bearing spines usually...

Opuntia soehrensii sp nov

Prostrate, in masses usually 1 meter in diameter or less joints at first ereet or aseending, finally prostrate and rooting and forming new eolonies, flattened, rather thin, somewhat tubereulate, very spiny, orbieular, 4 to 6 em. in diameter, often purplish spines slender, rather variable in eolor, usually yellow or brown, several from eaeh areole, sometimes as many as eight, the longest ones 5 em. long, ereet flowers light yellow, 3 em. long sepals brown filaments yellow style white...

A Opuntia soederstromiana sp nov

Sometimes spreading and bushy, but usually erect, 6 to 10 dm. high, very spiny joints obovate, 2 to 4 dm. long, bright green when young, or sometimes slightly glaucous, grayish green in age leaves subulate, small, reddish at top spines at first 2 to 5, but in age 10 or more, when young reddish or pinkish at base and paler above, soon gray throughout, unequal, subulate, 4 cm. long or less flowers at first yellow but soon orange to brick-red, rather large, 5 to 6 cm. long petals few, about 10,...

Opuntia bahiensis sp nov

Trunk 3 to 15 meters high, cylindric, 20 to 25 cm. in diameter, tapering gradually upward the center of trunk pithy, hollow in age, surrounded by an open woody cylinder lateral joints terete, the terminal ones flat and thin, ovate to oblong leaves small, 2 to 3 mm. long, turgid spines on terminal joints, if present, 1 or 2, slender, red at first, then brown spines on old trunk forming large clusters at all the areoles flowers not seen fruit deep red both within and without, oblong, 3 to 4 cm....

Opuntia caribaea sp nov

Stems i to 3 meters high, forming thickets in open woods and waste grounds ultimate joints horizontal, 5 to i0 cm. long, much thicker than in O. leptocaulis, with short, elevated tubercles areoles large, bearing white wool and a few long caducous hairs spines i to 3, porrect, acicular, 2 to 3 cm. long covered with thin, brown, papery sheaths glochids dark brown leaves small, i to 2 mm. long, acute flowers not known fruit red, 1.5 to 2 cm. long, usually naked but sometimes bearing short spines...

Opuntia galapageia Henslow Mag Zool and Bot 1 467 1837

Hort. Bois 894. 1898. Opuntia helleri Schumann in Robinson, Proc. Amer. Acad. 38 180. 1902. Opuntia insularis Stewart, Proc. Calif. Acad. IV. 1 113. 1911. Sometimes low and creeping, but often becoming very large, 5 to 10 meters high, with a large top either open or very compact and rounded trunk at first very spiny and made up of flat joints set end to end, with the short axis of each joint at right angles to that of the adjacent joint, in time becoming terete,...

Opuntia macracantha Grisebach Cat Pl Cub 116 1866

Erect, the trunk up to 15 cm. in diameter, its areoles 1 to 2 cm. broad, bearing many brownish glochids and several divergent spines 1 cm. long or less upper portion of the trunk, and the ultimate, oblong, or oblong-ovate, spreading branches flat, green, faintly shining, the areoles 2 to 3 cm. apart, scarcely elevated, the numerous glochids brown spines 1 to 4, up to 15 cm. long, nearly white, stout, subulate, or wanting flowers often numerous ovary 2.5 to 3 cm. long, densely beset with...

The cactaceae

Prostrate or spreading plants rarely erect, with mostly rather small, persistent, scarcely tu-berculate, orbicular or oval joints, and large flowers natives of the eastern, central, and southern United States. Plate 21 represents a group of hardy cacti, chiefly species of this series, at the New York Botanical Garden. Spines none or only 1 or 2 at an areole. Joints bluish green at least when young roots tuber-like. Fruit clavate joints thin. Fruit about 4.5 cm. long Fruit 5 to 7 cm. Fruit...

Introduction

The writers began field, greenhouse, and herbarium studies of the Cactaceae in 1904 and in the years following they made studies and collections over wide areas in the United States, Mexico, and the West Indies. It was first intended that these should be followed by a general description of the North American species only, but a plan for a more complete investigation of the family was proposed by Dr. D. T. MacDougal in January 1911. This was approved by the trustees of the Carnegie Institution...

Pereskia tampicana Weber Dict Hort Bois 939 1898

Shrub branches often without spines or the spines several, needle like, black, 2 to 3 cm. long areoles globular, appearing as knobs along the stem leaves about 5 cm. long, petioled flowers 2.5 cm. long petals entire, rose-colored. Type locality Near Tampico, Mexico. Distribution Eastern Mexico, but known only from the type locality. P. tampicana is not well known and has been reported only from Tampico, Mexico. Dr. E. Palmer made a careful search for it some years ago at the type locality, but...

Othe cactaceae

Joints elongated-lanceolate or oblong, several times longer than wide 175. O. linguiformis Joints obovate to suborbicular. Spines long. Spines subulate, up to 7.5 cm. 176. O. tapona Spines acicular, 4 cm. long or less. Spines nearly clear yellow, 177. O. littoralis Spines brown at base, long and 178. O. aciculata Areoles mostly 2.5 to 4 cm. apart. Bushy species. Spines yellow or yellowish 179. O. lindheimeri Spines pale yellow or 180. O. cantabrigiensis Depressed or procumbent 181. O....

Opuntia ficusindica Linnaeus Miller Gard Dict ed 8 No 2 1768

Pl. 468. 1753 Cactus opuntia Gussone, Fl. Sic. Prodr. 559 18278. Not Linnaeus. Opuntia vulgaris Tenore, Syll. Fl. Neap. 239. 1831. Opuntia ficus-barbarica Berger, Monatsschr. Large and bushy or sometimes erect and treelike and then with a definite woody trunk up to 5 meters high, usually with a large top joints oblong to spatulate-oblong, usually 3 to 5 cm. long, sometimes even larger areoles small, usually spineless glochids yellow, numerous, soon dropping off...

Opuntia pottsii Salm Dyck Cact Hort Dyck 1849 236 1850

Amer. Acad. 3 294. 1856. Low, spreading plant, 3 dm. high or less, from thickened tuberous roots 2 to 3 cm. in diameter, these sometimes moniliform joints broadly obovate, 3.5 to 12 cm. long, pale green to bluish areoles few, either small or large spines confined to the upper and marginal areoles, 1 or 2, slender, 2 to 4 cm. long, usually white but sometimes purplish glochids yellow, usually few but sometimes abundant flowers large, 6 to 7 cm. broad, deep...

Order Cactales

Perennial, succulent plants, various in habit, mostly very spiny, characterized by specialized organs termed areoles. Leaves usually none, except in Pereskia and Pereskiopsis, where they, are large and flat but fleshy, and in Opuntia and its relatives, where they are usually much reduced and mostly caducous, terete, or subulate. Spines very various in size, form, arrangement, and color, sometimes with definite sheaths. The areoles are peculiar and complex organs, situated in the axils of leaves...

Pereskia zehntneri sp nov

Shrub, 2 to 3 meters high, with a central erect trunk, very spiny branches numerous, horizontal, usually in whorls, sometimes as many as 10 in a whorl branches terete, green, fleshy, very easily detached from the stem leaves stiff, fleshy, numerous, small, 2 to 4 cm. long, ovate to orbicular, acute, standing at right angles to the branches areoles large, filled with short white wool and numerous slender white spines flowers at tops of branches, large, 7 to 8 cm. broad, bright red, appearing in...

Pereskia moorei sp nov

A much branched shrub about 1 meter high, covered with brown bark branches stout leaves orbicular or obovate-oblong, rounded or apiculate at the apex, somewhat cuneately narrowed at the base, thick and fleshy, 4 to 8 cm. long, 3.5 to 6 cm. wide areoles suborbicular, 4.5 mm. in diameter, the wool gray spines at each areole mostly 2 to 4, very unequal, the longest 7.5 cm. long or less, ashy gray, blackish toward the apex flowers purplish red, about 4.5 cm. long ovary few-leafed, its leaves...

Pereskia weberiana Schumann Gesamtb Kakteen 762 1898

Shrubby, much branched, glabrous, 2 to 3 meters high, the slender round branches about 3 mm. thick leaves ovate to elliptic, about 3 cm. long and 2 cm. wide, sessile, acute at the apex, obtuse at the base areoles circular, slightly elevated, the wool short, whitish, fading brown spines 3 to 6 at the lower areoles, solitary at the upper, 2 cm. long or less, terete, acicular, yellow or horn-colored flowers clustered, white, about 1 cm. long or less ovary about 2 mm. long, bearing a few white,...

Key to Genera

Stamens shorter than the petals. Joints flat to terete, not ribbed. Testa of the seed thin, black, Maihuenia Joints terete, longitudinally Grusonia 1. PERESKIOPSIS Britton and Rose, Smiths. Misc. Coil. 50 331. 1907. Trees and shrubs, in habit and foliage similar to Pereskia old trunk forming a solid woody cylinder covered with bark and resembling the ordinary dicotyledonous stein areoles circular, spine-bearing or sometimes spineless, also bearing hairs,...

Tacinga funalis sp nov

At first erect, then climbing over shrubs or through trees, 1 to 12 meters long, somewhat branching old stems woody, slender branches usually reddish, the areoles borne on low ribs glochids short flower, including ovary, 7 to 8 cm. long sepals about 10, short, ovate, acute, 5 to 15 mm. long petals about 7, green, 4 cm. long, acute, revolute stamens erect, connivent, not sensitive anthers narrow, elongated style elongated, thread-like, most slender below, a little longer than the stamens, 4.5...

Maihuenia patagonica Philippi

Opuntia patagonica Philippi, Linnaea 33 82. 1864. Pereskia philippii Weber, Dict. Hort. Bois 939. 1 898. Maihuenia philippii Weber in Schumann, Gesamtb. Kakteen 757. 1898. Low, much branched, and dense, resembling Semper-vivum tomentosum in habit joints subglobose, 1 to 1.5 cm. in diameter leaves subulate, green young areoles bearing white hairs spines weak, hardly pungent, white, the longest 10 to 15 mm. long flowers 2.8 to 3 cm. long fruit 8 to 10 mm. long, thicker than long leaves on the...

Opuntia burrageana sp nov

Usually low and bushy, rarely 1 meter high stems slender, 1 to 2 cm. in diameter, densely spiny leaves small, 2 mm. long, green, early deciduous old stem and branches terete young joints Fig. 84. Opuntia prolifera Fig. 85. Opuntia alcahes. Fig. 84. Opuntia prolifera Fig. 85. Opuntia alcahes. cylindric to narrow- clavate, 15 cm. long or less areoles closely set tubercles rather low, not much broader than long spines numerous, similar, spreading, rarely 2 cm. long, all covered with thin,...

Opuntia calmalliana Coulter

Habit and height unknown joints cylindrical, 1 to 2 cm. in diameter, glaucous, with linear-oblong crested (mostly distinct) tubercles 20 to 25 mm. long pulvini densely covered with yellowish wool, and with a penicillate tuft of whitish bristles at upper edge spines usually 4, the upper one stout and porrect, reddish with yellowish tip (as are all the spines), 2 to 2.5 cm. long (occasionally 1 to 2 short upper ones added), the usually 3 (sometimes 4) lower ones more slender and sharply...

Opuntia ramosissima Engelmann Amer Journ Sci II 14 339 1852

Amer. Acad. 3 309. 1856. Frutescent, bushy, sometimes 2 meters high, the branches gray, often widely spreading, and 9 cm. long tubercles low, slightly convex, 4-angled to 6-angled, giving the surface an appearance of being covered with diamond-shaped plates leaves ovoid, i to 3 mm. long, acute areoles on young shoots circular, with white or tawny wool and pale glochids, the upper part in age compressed into the narrow slit between the two -adjoining...

Opuntia wilcoxii sp nov

A tall, bushy plant, 1 to 2 meters high, very much branched joints oblong, thinnish, large, 2 cm. long, dark green, more or less purplish about the large areoles, finely puberulent glochids numerous, long, yellow spines 1 to 3, one very long (5 to 6 cm. long), porrect, white or somewhat yellowish flower, including ovary, 6 cm. long, yellow petals oblong, mucronate ovary bearing few large areoles, these filled with brown wool and yellow glochids filaments short style thick, 2 cm. long, with 10...

Opuntia hyptiacantha Weber Diet Hort Bois 894 1898

Bot. Gard. 21 169. 1910. Opuntia cretochaeta Griffiths, Proe. Biol. Soe. Washington 29 11. 1916. A tall, much branched plant, but in cultivation often only 1 meter high joints oblong to obovate, 20 to 30 em. long, pale green, but when young bright green spines on young joints single, porreet, and aeeompanied by 2 or 3, sometimes many, white, slightly pungent hairs spines on old joints 4 to *perhaps Zacualpan, in Vera Cruz, Mexico. 6 (in the original...

Opuntia amyclaea Tenore Fl Neap Prodr App 5 15 1826

Opuntia ficus-indica amyclaea Berger, Hort. Mortol. 411. 1912. Erect joints oblong to elliptic, 3 to 4 dm. long, about twice as long as broad, thick, dull green, a little glaucous leaves mm. long, acute, red areoles small, with 1 or 2 short bristles from the lower parts of areoles spines 1 to 4, stiff, nearly porrect, usually less than 3 cm. long, white or horn-colored, the stoutest angled glochids brown, soon disappearing flowers yellow fruit yellowish red, not very juicy. Type locality...

Opuntia megacantha Salm Dyck Hort Dyck 363 1834

Longleaf Cactus

Mo. Bot. Gard. 19 261. 1908. Opuntia incarnadilla Griffiths, Rep. Mo. Bot. Gard. 22 27. 1912. Plant tall, 4 to 5 meters high or more, with a more or less definite woody trunk joints of large plants obovate to oblong, often oblique, sometimes 40 to 60 cm. long or more, but in greenhouse specimens often much smaller, pale dull green, slightly glaucous leaves minute, often only 3 mm. long, green or purplish areoles rather small, on large joints often to 5 cm....

Opuntia palmadora sp nov

Plant often 3 meters high, sometimes even 5, but often low trunk sometimes 9 cm. in diameter, sometimes with brown, smooth bark, but usually very spiny branches numerous, usually erect, at times forming a compact, almost globular top, at other times quite open joints unusually thin and narrow, 1 to 1.5 dm. long, generally erect, very spiny leaves subulate, minute, 3 to 4 mm. long, green with reddish tips, found only on very young joints areoles filled with white wool spines usually 1 to 4,...

Pterocactus tuberosus Pfeiffer

Cact. 146. 1837. Pterocactus kuntzei Schumann, Monatsschr. Kak-teenk. 7 6. 1 897. Pterocactus kurtzei Schumann in Engler and Prantl, Pflanzenfam. Nachtr. 259. 1897. Pterocactus decipiens G rke, Monatsschr. Kakteenk. 17 147. 1907 Roots tuber-like, single or in clusters, usually small but sometimes large and thick, up to 12 cm. long by 8 cm. in diameter, deep-seated, giving off several erect stems, these branching at surface of the ground terminal branches...

Opuntia orbiculata Salm Dyck in Pfeiffer Enum Cact 156

Opuntia crinifera Salm-Dyck in Pfeiffer, Enum. Cact. 157. 1837. Opuntia crinifera lanigera Pfeiffer, Enum. Cact. 157. 1837. Opuntia lanigera Salm-Dyck, Cact. Hort. Dyck. 1849. 65. 1850. A plant without a very definite trunk, about 1 meter high, often broader than high joints green or bluish green, orbicular to obovate, sometimes spatulate, about 1 cm. long leaves subulate, to 3 mm. long areoles small, in seedlings and young plants producing long white hairs or wool long-persistent spines...

Key to Subgenera and Series of Opuntiacontinued

At least some of the joints flat or compressed Subgenus 3. Platyopuntia B. Stems perennial, stout or slender. C. Plants branching from near or at the base, not forming erect, cylindric unjointed trunks flowers mostly large. D. Epidermis glabrous or pubescent, not papillose-tuberculate when dry. E. Flowers perfect petals obovate to oblong. F. Fruit a juicy berry (exceptions in Series 5, Basilares). G. Joints readily detached. H. Joints very readily detached low, mostly small-jointed species....

Opuntia distans sp nov

Erect, densely much branched, 3 to 4 meters tall, with a short trunk 1.5 dm. in diameter joints flat, bluish green when young, grayish green when old, obovate, 2 to 2.5 dm. long, about 1.5 dm. wide and nearly 2 cm. thick, rounded above, narrowed at the base, glabrous areoles few, only about 12 on each side of a joint, distant, large, nearly circular, 8 to 10 mm. broad, slightly elevated, bearing many short glochids, but quite spineless leaves subulate, about 3 mm. long ovary obconic, 3 to 4 cm....

Opuntia pilifera Weber Dict Hort Bois 894 1898

Becoming 4 to 5 meters high, with a definite, thick, woody, cylindric trunk and a broad, rounded top joints oblong to orbicular, 1 to 3 dm. long, obtuse at apex, pale green leaves subulate, about 5 mm. long areoles 2 to 3 cm. apart, scarcely elevated spines 2 to 9, white, slightly spreading, acicular the outer part of the areole filled with nearly white, more or less deciduous hairs 2 to 3 cm. long flowers large, red areoles on the ovary bearing brown glochids and deciduous hairs, the latter...

Opuntia nashii Britton Bull N V Bot Gard 3 446 1905

Tree-like, or sometimes bushy, dull green main axis round, 1 to 4 meters high, 5 to 12 cm. in diameter, spiny branches flat or, becoming round below, the principal ones continuous, 1 meter long or more, 6 cm. wide or less, crenate, blunt lateral branches opposite or alternate, oblong to linear-oblong, often 3 dm. long, and 8 cm. wide, only about 6 mm. thick, blunt, crenate areoles 1 to 3 cm. apart, slightly elevated spines mostly 5 at each areole (2 to 5), divergent, slender, straight, light...

Opuntia mortolensis sp nov

Slender, 6 dm. high or less, dull green, with dark blotches below the areoles, the ultimate twigs short, sometimes only 2 cm. long, 4 to 5 mm. thick, scarcely tuberculate leaves ovate to ovate-subulate, 2 to 4 mm. long, green, with acute bronze-colored tips young areoles with numerous, early deciduous, weak white hairs sometimes longer than the leaves, and several brown glochids areoles of old branches with solitary acicular spines 3 to 5 cm. long, these with tightly fitting brownish sheaths...

Opuntia sulphurea G Don in Loudon Hort Brit 196 1830

Gartenz. 17 166. 1861. Opuntia pampeana Spegazzini, Contr. Fl. Ventana 30. 1896. Opuntia vulpina Weber, Diet. Hort. Bois 895. 1898. Plants low and spreading, forming broad elumps 1 to 2 meters in diameter, 3 dm. high or less joints flattened, oblong to obovate, 12 to 25 em. long, thick, strongly tubereulate, usually green but sometimes purplish terminal joints easily detached leaves eonie, about 2 mm. long spines 2 to 8, generally straight but sometimes...

Opuntia spinulifera Salm Dyck Hort Dyck 364 1834

Opuntia candelabriformis Martius in Pfeiffer, Enum. Cact. 159. 1837. Opuntia oligacantha Salm-Dyck, Cact. Hort. Dyck. 1849. 241. 1850. Tall, much branched plants joints orbicular, to oblong, sometimes obovate, 20 to 30 cm. long, glabrous, a little glaucous leaves small, red, 4 to 6 mm. long areoles on young joints usually small, sometimes longer than broad, the margin at first bordered with cobwebby hairs, afterwards short white hairs, either spineless or with short white bristle-like spines...

Opuntia lasiacantha Pfeiffer Enum Cact 160

Opuntia megacantha lasiacantha Berger, Bot. Fig. 221. Opuntia spinulifera. X0.4. A tall plant, with a more or less definite trunk joints obovate to oblong, 20 to 30 cm. long leaves short, red areoles small, 2 to 3 cm. apart spines usually 1 to 3, acicular, white, 2 to 4 cm. long, slightly spreading glochids numerous, prominent, dirty yellow to brown flowers large, yellow or deep orange, 6 to 8 cm. broad ovary bearing long, brown, deciduous bristles, especially from the upper areoles style...

Opuntia juniperina sp nov

Somewhat of the habit of Opuntia polyacantha, but not so procumbent, stouter, and with fewer and stouter spines joints obovate, 10 to 12 cm. long, broad, rounded at top areoles small, all below the middle of the joint naked, the upper ones each bearing one stout spine and 1 to several very short accessory ones the longer spine very stout, 3 to 4 cm. long, brown flowers not known fruit dry, oblong, 3 cm. long, spineless, with a shallow, flat umbilicus seeds large, irregular, 6 to 8 mm. brniiH On...

Opuntia bahamana sp nov

Branched from near the base, bushy, about 1.5 m. high joints oblong to lanceolate, flat, and thin, 1 to 5 dm. long, 4 to 10 cm. wide, dull green, obtuse, scarcely undulate leaves red, subulate, 3 cm. long areoles 1.5 to 3 cm. apart, scarcely elevated, about 2 mm. in diameter, spineless, or bearing 1 to 4 acicular yellow spines 2 cm. long or less when young glochids few and short flower about 6 cm. broad petals ob-ovate, rose-tinted below, yellowish rose above sepals dark rose, whitish margined....

Key to Subgenera and Series of Opuntia

Joints all terete, elongated or short, cylindric to globose. B. Branches several, Subgenus 1. Cylindropuntia D. Spines, at least some of them, solitary, sometimes several, acicular ultimate branches slender, rarely more than 1 cm. thick. E. Stem and branches conspicuously marked by flattened, diamond-shaped tubercles fruit dry, covered with long bristle-like spines Series 1. Ramosissimae (N. A. EE. Tubercles not flattened nor diamond-shaped fruit usually a naked berry Series 2. DD. Spines...