HARRISIA. 



155 



Illustrations: Monatsschr. Kakteenk. 14: 89. f. 1); Rep. Mo. Bot. Gard. 16: pi. 9, f. 1 ; 

 U. S. Dept. Agr. Bur. PI. Ind. Bull. 262: pi. 7, all as ( creus tortiwsiis. 



Plate xxi, figure i, shows a flowering branch, figure 2 a fruiting branch, both from 

 plants in the collection of the New York Botanical Garden. 



12. Harrisia pomanensis (Weber). 



Cereus pomanensis Weber in Schumann, Gesamtb. Kakteen 136. 1897. 

 Often prostrate or arched, bluish green and glaucous; ribs 4 to 6, rounded, obtuse; radial spines 

 6 to 8, i cm. long; central spine solitary, 1 to 2 cm. long; spines all subulate-, when young white or 

 rose-colored; flowers 15 cm. long; outer perianth-segments linear, acute; inner perianth-segments 

 oblong, acutish, probably white; stigma-lobes numerous, linear; scales on ovary and flower-tube 

 ovate, acute. 



Type locality: Poman, Catamarca, Argentina. 



Distribution: Northwestern Argentina. 



There is a living specimen of this species in the New York Botanical Garden (No. 

 39517). The stem is 4-angled, 2 cm. broad, and light green. The small areoles are 2 cm. 

 apart and the acicular spines are less than 5 mm. long. The plant has not yet flowered. 



Cereus bonplandii pomanensis Weber (Schumann, Gesamtb. Kakteen 137. 1897) is 

 given as a synonym of this species. C. pomanensis grossei (Graebener, Monatsschr. Kak- 

 teenk. 19: 137. 1909) is only a mentioned name. 



Illustrations: Rep. Mo. Bot. Gard. 16: pi. 7, f. 5, 6, both as Cereus pomanensis. 



Figure 225 is from a photograph of a flowering branch in the collection of Dr. Speg- 

 azzini at La Plata, Argentina. 



13. Harrisia martinii (Labouret). 



Cereus martinii Labouret, Ann. Soc. Hort. Haute Garonne. 1854. 

 Eriocereus martinii Riccobono, Boll. R. Ort. Bot. Palermo 8: 241. 1909. 

 Cereus martinii perviridis Weingart, Monatsschr. Kakteenk. 24: 72. 1914. 



Plant much branched, clambering, 2 meters long or longer; old stems terete, spineless; young 

 stems vigorous, about 2 cm. thick, pointed, 4 or 5-angled; areoles with a stout central spine 2 to 3 

 cm. long, straw-colored with a black tip and a row of short radials, sometimes half as long as the 

 central one; flower about 2 dm. long; outer perianth-segments narrow, becoming pinkish, acuminate; 

 inner perianth-segments broader, short-acuminate, white or tinged with pink; style green; ovary 

 tuberculate ; scales on ovary ovate, acuminate, on tube similar, becoming more elongate above, all with 

 brown felt in their axils; fruit red, 3.5 cm. long, bearing small scales, the flowers withering-persistent. 



Type locality: Not cited. 



Distribution: Argentina. 



Cereus monacanthus Cels, not Lemaire, is not listed in the Index Kewensis, but it is 

 cited by Schumann (Gesamtb. Kakteen 142. 1897) as a synonym of this species, quoting 

 Cels, Catalogue, 1853. Here may belong Pilocereus monacanthus Lawrence in Loudon, 

 Gard. Mag. 17:319. 1841. 



A plant of this species in the Kew collection is said by Mr. Weingart to be Cereus 

 regelii (Monatsschr. Kakteenk. 20:33. 1910). 



Illustrations: Amer. Gard. 11: 569; Cycl. Amer. Hort. Bailey 1: f. 304 (both fruits 

 spineless); Rep. Mo. Bot. Gard. 16: pi. 10, f. 1,2; Rev. Hort. 94: f. 123 to 125, all as Cereus 

 martinii. 



Plate xix, figure 3, represents a fruiting branch, and plate xx, figure 2, a flowering 

 branch, both painted from plants in the collection of the New York Botanical Garden. 



14. Harrisia adscendens (Giirke). 



Cereus adscendens Giirke, Monatsschr. Kakteenk. 18: 66. 1908. 



At first erect, becoming much branched and bushy or sometimes with long clambering branches 

 5 to 8 meters long, 2 to 5 cm. thick; ribs 7 to 10, low, rounded, broken up into elongated tubercles; 



