Cephalocereus barbadensis sp nov

Plant light green, tall, 3 to 6 meters high, with ascending or spreading columnar branches; ribs usually 8 or 9, high, separated by acute intervals; areoles 1 cm. apart; spines acicular, 1 to 4

* Pilocereus niger is different from Cactus niger Salm-Dyck and is not a synonym of Cereus nobilis, although it was referred to P. strictus by Schumann (Gesamtb. Kakteen 189. 1897). Neumann described Pilocereus niger (Rev. Hort. II. 4: 289. 1845), a new species based on plants sent from Mexico by M. Ocampo. This species in the index Kewensis and also in Schumann's Monograph is attributed to Poiteau, one of the editors of the Revue, but the article is signed by Neumann and, therefore, he should be made the author for the name. The Index Kewensis also makes it a synonym of Cereus niger, which it is not, nor should it be referred to this plant as it is by Schumann.

cm. long, numerous, light brown; flowering areoles confined to one side of the branch and near its top; sometimes only on 3 ribs, producing abundant, long, white wool; flowers 5 to 6 cm. long; tube short and thick, greenish below, red above; perianth-segments numerous, light pink, spreading, obtuse; stamens scarcely exserted, dull yellowish white; style included; fruit red, subglobose, 3.5 cm. in diameter; seeds minute, shining, black.

Collected by J. N. Rose in company with W. Nowell, of the Imperial Department of Agriculture for the West Indies, on Barbados, September 30, 1915 (No. 21181). This species is found only on the exposed hills near the ocean on the eastern side of the island.

Plate vi, figure 3, shows the top of the type specimen in the New York Botanical Garden in flower in 1916. Figure 65 is from a photograph of the same plant; figure 66 is from a photograph taken near Boscobel, St. Andrew, February 9, 1919, communicated by Sir Francis Watts.

Fig. 64.—Cephalocereus nobilis. Fig. 65.—Cephalocereus barbadensis.

26. Cephalocereus millspaughii Britton, Contr. U. S. Nat. Herb. 12: 417. 1909.

Cereus millspaughii Vaupel, Monatsschr. Kakteenk. 23: 23. 1913.

Stem branched, 2 to 6 meters high, 20 cm. thick at the base, the branches nearly erect, 8 to 12 cm. thick, pale grayish green, pruinose, 8 to 13-ribbed; ribs acutish, about as wide as high or a little wider; areoles 1 to 2 cm. apart; spines about 20, acicular, widely radiating, 1 to 2 cm. long, or at the flower-bearing (upper) areoles 3 to 7 cm. long, the old ones gray-brown, the young ones yellow or yellowish brown, with darker bases; upper areoles on one side of the plant with large tufts of whitish wool 5 to 7 cm. long, often as long as the spines or longer; flowers greenish, 6 to 7 cm. long; tube obconic with a spreading limb, 6 to 7 cm. broad, slightly purple, a little glaucous; scales on ovary and flower-tube few, small, acute; inner perianth-segments waxy, rigid, white, 1.5 to 2 cm. long; style white; fruit depressed-globose, about two-thirds as long as thick, about 4 cm. in diameter.

Fig. 66.—Cephalocereus barbadensis.

Type locality: Cave Cay, Exuma Chain, Bahamas.

Distribution: Bahamas; Cays of northern Cuba.

Figure 67 is from a photograph, taken by Marshall A. Howe in 1907 on the island Mariguana, Bahamas; figure 68 represents the fruit of the type specimen.

27. Cephalocereus swartzii (Grisebach) Britton and

Rose, Contr. U. S. Nat. Herb. 12: 420. 1909. Fig_ 68._Fruit of Cephalocereus millspaughii. X0.7 Cereus swartzii Grisebach. Fl. Brit. W. Ind. 301. i860. Fig 69.—Flower of Cephalocereus royeniL X°./.

Tall, 2 to 7 meters high, often simple; branches obtuse at apex; ribs 10, obtuse, strongly indented between the areoles; spines 8 to 10, or in young plants 20 or more from an areole, the longer ones 2 cm. long, slightly spreading; flowers pinkish to greenish yellow, sometimes borne on all the ribs, usually near the tops of the branches, surrounded with masses of white hair and long bristles; perianth 5 to 6 cm, long, the inner perianth-segments obtuse; fruit depressed-globose, 3 cm. in diameter, perhaps larger.

Type locality: Jamaica.

Distribution: Southern side of Jamaica.

Cephalocereus swartzii, which is confined to the dry southern portions of Jamaica, has frequently been confused with Lemaireocereus hystrix, which is very commonly used as a hedge plant along the country roads about Kingston.

Schumann (Gesamtb. Kakteen 184. 1897) by mistake attributed the name Pilocereus swartzii to Grisebach.

Figure 70 is from a photograph obtained by Wm. Harris near Port Henderson, Jamaica.

28. Cephalocereus polygonus (Lamarck) Britton and

Cactus polygonus Lamarck, Encycl. 1: 539. 1783.

Cereus polygonus De Candolle, Prodr. 3: 466. 1828.

Pilocereus plumieri Lemaire, Rev. Hort. 1862: 427. 1862.

Pilocereus schlumbergeri Weber in Schumann, Gesamtb. Kakteen 186. 1897.

Pilocereus polygonus Schumann, Gesamtb. Kakteen 196. 1897.

Plants at first simple, but when old with large, much branched tops, 3 meters high or more; trunk erect, 1 to 1.5 meters long below the branches; branches elongated, erect or ascending, 5 to 13-ribbed; young growth, at least in some forms, very blue; ribs rather narrow, 2 cm. high or more, grooved on their sides; areoles closely set, often only 1 cm. apart, producing long tawny wool, longer than the short acicular spines; old areoles without wool, vigorous and producing very different spines from the new ones; first spines acicular or setaceous, 1 to 1.5 cm. long, yellow, becoming gray or darker by age; supplementary spines elongated, subulate, yellowish brown, 2 to 7 cm. long; flowering areoles very woolly; flowers 5 to 6 cm. long, white; perianth-segments rounded or somewhat acutish; fruit globular, 3 to 4 cm. in diameter; seeds numerous, small, 2 cm. long, smooth, shining.

Type locality: Santo Domingo.

Distribution: Dry parts of Hispaniola.

Illustration: Plumier, Pl. Amer. ed. Burmann, pl. 196.

Plate vii, figure 1, is from a photograph taken by Paul G. Russell near Azua, Santo Domingo, in 1913.

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