Trichocereus lamprochlorus Lemaire

Cereus lamprochlorus Lemaire, Cact. Aliq. Nov. 30. 1838. Cereus nitens Salm-Dyck, Allg. Gartenz. 13: 354. 1845.

Echinocereus lamprochlorus Rümpler in Förster, Handb. Cact. ed. 2. 831. 1885. Echinopsis lamprochlora Weber, Dict. Hort. Bois 471. 1896, as synonym.

Columnar, simple or branching at base, 1.5 to 2 meters high, 7 to 8 cm. in diameter; ribs 10 to 17, low and rounded; radial spines 11 to 14, acicular to subulate, 8 to 10 mm. long; central spines 4, 2 cm. long; flowers funnelform, 20 to 24 cm. long; outer perianth-segments red; inner perianth-segments white, 2.5 cm. long, acuminate.

Type locality: Not cited.

Distribution: Northern Argentina and, according to Rümpler, Bolivia.

Cereus lamprochlorus salinicolus Spegazzini (Anal. Mus. Nac. Buenos Aires II. 4: 286. 1902) from southern Argentina, may belong here, but it is much south of the range of this species; Cereus chiloensis lamprochlorus Monville (Labouret, Monogr. Cact. 326. 1853) is given as a synonym. Echinocactus wangertii (Labouret, Monogr. Cact. 326. 1853) has been referred here as a synonym.

The type specimens were without flowers and fruit. Afterward, Schumann referred to this species a plant collected by Otto Kuntze in Jujuy, Argentina, in October 1 892. A specimen of this collection is now in the herbarium of the New York Botanical Garden, and has been used in drawing up the above description, together with plants and specimens obtained by Dr. Shafer at Andalgala, Argentina, in 1917 (No. 13). A cespitose plant with long procumbent stems is sometimes associated with this species, but whether conspecific with it or distinct we have been unable to ascertain.

Illustration: Monatsschr. Kakteenk. 26: 60, as Cereus lamprochlorus.

Figure 192 is from a photograph of plants in flower, taken by Dr. Shafer in 1917.

Fig. 192.—Trichocereus lamprochlorus.

5. Trichocereus pasacana (Weber).

Pilocereuspasacana Rumpler in Forster, Handb. Cact. ed. 2. 678. 1885.

Cereus pasacana Weber, Monatsschr. Kakteenk. 3: 165. 1893.

Fig. 192.—Trichocereus lamprochlorus.

5. Trichocereus pasacana (Weber).

Pilocereuspasacana Rumpler in Forster, Handb. Cact. ed. 2. 678. 1885.

Cereus pasacana Weber, Monatsschr. Kakteenk. 3: 165. 1893.

Plant often 6 to 10 meters high, sometimes less than 1 meter, usually either simple or with few branches and resembling a small Carnegiea gigantea, sometimes with a number of branches from the base, more or less club-shaped, 3 dm. in diameter near the top, when old spineless at base; ribs 20 to 38, low, 2 cm. high; areoles large, approximate, sometimes touching one another; spines numerous, rather variable on young plants; spines yellow, stiff, subulate, the longer ones 4 to 14 cm. long; on old plants, especially flowering ones, elongated, flexible, sometimes bristle-like, 10 to 12 cm. long, yellow or even white; flowers 10 cm. long, the ovary and tube covered with long brown hairs; fruit globular, about 3 cm. in diameter; seeds small, dull black.

Type locality: High valleys of cordilleras of Catamarca and Salta, Argentina.

Distribution: Argentina and Bolivia.

This species is very characteristic of the high plains of northern Argentina and Bolivia, sometimes growing in valleys, but usually along cliffs and on rocky hillsides, and often forms the most conspicuous plant in the landscape. The woody trunks are used for making goat corrals and rude huts. The fruit, which is said to be edible, is called pasacana.

Illustrations: Nov. Act. Soc. Sci. Upsal. IV. 1: pl. 4; pl. 5, f. 1, as Cereus pasacana.

Figure 191 is from a photograph taken by Dr. Rose near Comanche, Bolivia, in 1914; figure 193 shows a flower and figure 194 a fruit collected by Dr. Shafer near Andalgala, Argentina, in 1916.

Fig. 193.—Flower of T. Fig. 194.—Fruit of T. Fig. 195.—Flower of T. candicans. pasacana. X0.6. pasacana. X0.6. X0.6.

6. Trichocereus bridgesii (Salm-Dyck).

Cereus bridgesii Salm-Dyck, Cact. Hort. Dyck. 1849. 208. 1850.

Cereus lagenaeformis Förster, Hamb. Gartenz. 17: 164. 1861.

Cereus bridgesii brevispinus Schumann, Gesamtb. Kakteen 108. 1897.

Cereus bridgesii lageniformis Schumann, Gesamtb. Kakteen 108. 1897.

Cereus bridgesii longispinus Maass, Monatsschr. Kakteenk. 15: 119. 1905.

Cereus lasianthus Schumann in Rusby, Bull. N. Y. Bot. Gard. 4: 365. 1907, as hyponym.

Tall, 2 to 5 meters high, more or less branching, pale green, a little glaucous; branches 1 to 1.5 dm. in diameter, 4 to 8-ribbed; ribs obtuse, separated by broad but shallow intervals; areoles large, about 2 cm. apart; spines 2 to 6, yellowish, acicular to subulate, very unequal, sometimes 10 cm. long, not swollen at base; flowers large, 18 cm. long; flower-tube 5 to 6 cm. long; throat broad; inner perianth-segments oblong, perhaps white, 5 to 6 cm. long; scales on ovary and flower-tube small, sometimes only 3 to 4 mm. long, scattered, bearing numerous hairs in their axils; fruit scaly, long-hairy, 5 to 6 cm. long.

Type locality: Not cited.

Distribution: About La Paz, Bolivia, where it is frequently grown as a hedge plant or placed on the tops of walls for the protection of gardens.

Mr. Juan Söhrens reports a similar plant from northern Chile which may belong here, or it may be the little-known Cereus arequipensis.

The origin of this species is unknown, but since it was named for Bridges, who collected in Bolivia, it is probable that it came from that country. Dr. Rose's specimens from Bolivia (No. 18842) closely resemble living plants so named from European collections, now represented in the New York Botanical Garden, so that we have no hesitancy in referring them here.

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