Selenicereus brevispinus sp nov

Stems rather stout, climbing or clambering, 2 to 3 cm. thick, in cultivation somewhat branching, light green, the growing branches tipped with white hairs; ribs 8 to 10, separated by narrow intervals, undulating, with knobby areoles; areoles circular, with short tawny felt;

spines about 12, conic, stiff, about 1 mm. _

lone, the 3 or 4 centrals thicker than „ „ , rc , ,, .

, °7 V ^ , iiii-i Fig. 277.—Branch of S. kunthianus. X0.5.

the somewhat curved or hooked radials;

bristles from the lower parts of the areoles, 6 or more, longer than the spines, hair-like; flower-

buds covered with long white hairs; flower 25 cm. long; outer perianth-segments narrow, in 2 or 3 series, brown, or inner series yellowish, acuminate, 8 to 9 cm. long; inner perianth-segments shorter and broader than the outer, pure white, entire, acute; filaments numerous, included; style not projecting beyond the stamens, 17 to 18 cm. long; stigma-lobes linear, about 20; scales on the ovary and tube spreading, 4 to 6 mm. long; fruit not known.

Collected by Dr. J. A. Shafer on Cayo Romano, Cuba, in 1909 (No. 2811).

This species is clearly distinct from S. boeckmannii. Both flowered May 2, 1915, in Washington, when decided differences were observed in the color of the hairs on the flower-tube and in the color of the outer perianth-segments.

Figure 278 is from a photograph of a branch of the type plant.

Fig. 278.—Selenicereus brevispinus.

9. Selenicereus boeckmannii (Otto) Britton and Rose, Contr. U. S. Nat. Herb. 12: 429. 1909.

Cereus boeckmannii Otto in Salm-Dyck, Cact. Hort. Dyck. 1849. 217. 1850.

Cereus irradians Lemaire, Illustr. Hort. 11: Misc. 74. 1864.

Cereus eriophorus Grisebach, Cat. Pl. Cub. 116. 1866 Not Pfeiffer, 1837.

Cereus vaupelii Weingart, Monatsschr. Kakteenk. 22: 106. 1912.

Stems light green, 1 to 2 cm. in diameter, strongly angled; ribs 3 to 8, slightly if at all undulating; areoles at first brownish but white in age; spines and hairs in the areoles at first purplish, the spines 3 to 6, becoming yellowish, 2 mm. long or less; flowers not fragrant, 24 to 39 cm. long; outer perianth-segments and scales linear, brownish; inner perianth-segments oblanceolate, 10 cm. long by 3 cm. broad at widest place, pure white; tube and throat 14 cm. long, bearing scattered, short, linear, acute, reddish scales, their axils bearing long brown silky hairs and brown bristles; filaments greenish, long, slender, and weak; style greenish, about 4 mm. in diameter; ovary strongly tuberculate; fruit globular, 5 to 6 cm. in diameter.

Type locality: Not cited.

Distribution: Cuba, Hispaniola, and eastern Mexico; introduced into the Bahamas.

Plate xxxvi, figure 2, shows a specimen collected by J. A. Shafer on Cayo Guayaba, Cuba, in 1909, which flowered in the New York Botanical Garden, May id., 1913; figure 3 is from a specimen collected in Cuba by Dr. Britton, which flowered and set fruit in 1915.

10. Selenicereus macdonaldiae (Hooker) Britton and Rose, Contr. U. S. Nat. Herb. 12: 430. 1909.

Cereus macdonaldiae Hooker in Curtis's Bot. Mag. 79: pl. 4707. 1853. The old stems always terete, 10 to 15 mm. in diameter; younger stems somewhat 5-angled, giving off aerial roots, with rather prominent, flattened tubercles 1 to 5 cm. apart, 2 to 3 mm. high; spines

Aerial 246 Jpg

Flower on branch of Selenicereus coniflorus. (Natural size.)

several, 2 mm. long or less; flowers 30 to 34 cm. long; outer perianth-segments, and upper scales linear, yellow, the outermost scales red or brownish; inner perianth-segments pure white, 10 mm. long, oblanceolate, 2 to 3 cm. broad at widest point, acute; tube proper 12 cm. long, clothed with small scales bearing brown hairs and spines in their axils; fruit oblong, about 8 cm. long.

Fig. 280.—Selenicereus macdonaldiae.

Type locality: Cited as Honduras.

Distribution: According to Dr. Spegazzini (Anal. Mus. Nac. Buenos Aires III. 4: 484), it is found in Uruguay and Argentina, and he thinks that Maldonado, near Montevideo, is the type locality; we know only plants in cultivation.

Cereus donatii (Schumann, Monatsschr. Kakteenk. I3: 185. I903), first listed in Haage and Schmidt's Catalogue, seems to belong here.

Cereus grusonianus Weingart (Monatsschr. Kakteenk. I5: 54. I905) is apparently a race of this species, judging from the description and from small plants at the New York Botanical Garden.

Illustrations: Cact. Journ. 2: I35; Curtis's Bot. Mag. 79: pl. 4707; Fl. Serr. 9: pl. 896, 897; Cassell's Dict. Gard. i: I94; Monatsschr. Kakteenk. 14: 57, all as Cereus macdonaldiae, Contr. U. S. Nat. Herb. 12: pl. 76.

Figure 280 shows a flower of a plant in the collection of the United States Department of Agriculture; figure 279 shows a piece of a branch from a plant in the New York Botanical Garden; figure 28I shows a fruiting branch.

11. Selenicereus hamatus (Scheidweiler) Britton and Rose, Contr. U. S. Nat. Herb. 12: 430.

I9o9.

Cereus hamatus Scheidweiler, Allg. Gartenz. 5: 7I. I837.

Cereus rostratas Lemaire, Cact. Aliq. Nov. 29. 1838. 28:._Selenicereus macdonaldiae.

Stem bright green, long and clambering, the branches strongly 4-angled, rarely 3-angled, about 1.5 cm. thick; areoles with spines and black wool, remote, at the upper edges of knobby projections, these often forming obtuse, deflexed spurs about 1 cm. long; spines on juvenile plants bristle-like, white, on old branches fewer, stouter, brown or black; flower 20 to 25 cm. long; upper scales dark green, tinged with red; outer perianth-segments pale green, narrow, about 8 cm. long; inner perianth-segments broad, white; flower-tube 10 cm. long, 22 mm. in diameter, its areoles long-hairy; filaments, style, and stigma-lobes yellow.

Fig. 282.—Selenicereus hamatus.

Type locality: Mexico.

Distribution: Southern and eastern Mexico.

According to the Index Kewensis Cereus rostratus occurs on the island of Antigua, but Dr. Rose was unable to find it there in 1913.

This species is common in cultivation in greenhouses and is occasionally seen in yards and patios in Mexico. Although we have seen no wild specimens, it seems to be common along the eastern coast of Mexico, probably in the wooded regions.

2. Flower of Selenicereus boeckmannii.

3. Fruit of Selenicereus boeckmannii.

(All natural size.)

2. Flower of Selenicereus boeckmannii.

3. Fruit of Selenicereus boeckmannii.

(All natural size.)

Illustrations: Monatsschr. Kakteenk. 9: 23; Rep. Mo. Bot. Gard. 16: pl. 11, f. 4, 5; Schumann, Gesamtb. Kakteen Nachtr. f. 7; Blühende Kakteen 3: pl. 161, 162; Wildeman, Icon. Select. 3: pl. 103, all as Cereus hamatus; Möllers Deutsche Gärt. Zeit. 14: 340; De Laet, Cat. Gen. f. 30, as Cereus rostratus; Rev. Hort. Belge 40: after 184, as Cereus kostratusf* Bull. Brooklyn Inst. Arts and Sci. 5: 236, 237 (2 figures).

Figure 282 15 from a photograph of a flower, taken at the New York Botanical Garden on the evening of October 10, 1910; figure 283 shows a part of a branch.

Fig. 284.—Selenicereus vagans.

12. Selenicereus vagans (K. Brandegee).

Cereus vagans K. Brandegee, Zoe 5: 191. 1904.

Cereus longicaudatus Weber in Gosselin, Bull. Mus. Hist. Nat. Paris 10: 384. 1904.

Stems creeping over rocks, often forming large clumps, more or less rooting, 1 to 1.5 cm. in diameter; ribs about 10, low; areoles 1 to 1.5 cm. apart; spines acicular, numerous, less than 1 cm. long, brownish yellow; flower 15 cm. long; tube, including throat, about 9 cm. long, slightly curved, brownish, with small scattered scales bearing clusters of 5 to 8 acicular spines in their axils; throat narrow, 5 cm long; outer perianth-segments linear, brownish to greenish white 6

*Doubtless error for rostratus.

cm long; inner perianth-segments white, oblanceolate, 6 cm. long, with short acuminate tips, the margins undulate or toothed, especially above; stamens numerous, weak; filaments white or white with greenish bases; style greenish or greenish with cream-colored upper part, slender; stigmalobes 12, linear; ovary covered with acicular spines.

Type locality: Mazatlan, Mexico.

Distribution: Western coast of Mexico.

Illustration: Pamphlet descriptive of Carnegie Institution of Washington, seventh and eighth issues, p. 23 (reproduced here on p. 239).

Figure 284 shows a flower of a plant which bloomed at the National Botanical Garden, Washington, D. C., in 1905; figure 285a shows a tip of shoot and 285b a shoot with flower-bud, from specimens grown at the United States Department of Agriculture.

Fig. 285.—a and b, Selenicereus vagans; c and d, Selenicereus murrillii. X0.66.

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