SELENICEREUS. 201 



long, weak, reclining on the lower side of the flower-tube and attached along the inner face of the 

 tube for 7 to 8 cm.; tube-proper about 2 cm. long, yellow within; style 20 cm. long, yellowish green, 

 bronzed above, thick but weak; stigma-lobes numerous, linear; ovary covered with long white silky 

 hairs and bristles, 10 to 12 mm. long; fruit globular, red, 6 to 7 cm. in diameter. 



Type locality: Mexico. 



Distribution: Mexico; known to us only from cultivated specimens or from plants 

 escaped from gardens. 



Cereus antoinii (Pfeiffer, Hnum. Cact. 1 14. 1837) is known only as a synonym of Cereus 

 nycticallus. Cereus rosaccus, first mentioned by De Candolle (Prodr. 3: 471. 1828), is only a 

 garden name which Pfeiffer (Enum. Cact. 114. 1837) referred to C. nycticallus. 



Cereus peanii Beguin first mentioned in Rebut's Catalogue (Monatsschr. Kakteenk. 4: 

 173. 1894) has never been formally published. According to Weber, it is a hybrid of which 

 Cereus nycticallus is one of the parents. Cereus nothus (Monatsschr. Kakteenk. 4:173. 1894), 

 grown by Gruson but never described, is, according to Schumann, Cereus pterogonus. Cereus 

 nothus Wendland (Schumann, Gesamtb. Kakteen 143. 1897), however, he says is a hybrid. 



Several varieties of this species have been named, most of which doubtless belong here ; 

 at least the following do: C. nycticalus gracilior Haage (Forster, Handb. Cact. 416. 1846), 

 C. nycticalus maximiliani (Arendt, Monatsschr. Kakteenk. 1:58. 1891), and C. nycticalus 

 viridior Salm-Dyck (Cact. Hort. Dyck. 1849. 51, 216. 1850). It has frequently been used 

 by gardeners in making hybrids, especially with 5. grandiflorus and Heliocereus speciosus. 



This is a common plant in conservatories. 



Illustrations: Amer. Garden 11:471; Diet. Gard. Nicholson 1 : f . 408; Lemaire, Cact. 

 f. 11 ; Riimpler, Sukkulenten f. 70, 71 ; Verh. Ver. Beford. Gartenb. 10: pi. 4, all as Cereus 

 nycticallus. 



Hate xxxvin, figure 1, shows a fruiting branch of a plant obtained from J. B. Barre 

 in 1 901, which flowered in the New York Botanical Garden in 1915. 



7. Selenicereus kunthianus (Otto) Britton and Rose, Contr. U. S. Nat. Herb. 12: 430. 1909. 



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

 Stems elongate, weak, bluish green or purplish, 1 to 2.5 cm. thick; ribs 5 to 10, low; spines 

 only 1 to 2 mm. long, 7 to 9; flowers 24 cm. long, the slender tube about 12 cm. long; outer perianth- 

 segments numerous, linear, shorter than the white inner ones; axils of scales on ovary and flower-tube 

 with long silky hairs; fruit unknown. 



Type locality: Not cited. 



Distribution: Known only in cultivation; said to have come from Honduras. 



We are basing our determination of this species on a plant sent under this name to 

 Dr. Rose from the Berlin Botanical Garden (1909); this has 5-angled stems. The ori- 

 ginal description of the species calls for 7-angled to 10-angled stems, however. There may 

 be this amount of variability in the stems, or there may be two species involved. 



Figure 277 shows a branch of a plant in the collection of the New York Botanical 

 Garden, received from the Berlin Botanical Garden. 



8. Selenicereus brevispmus sp. nov. *4^ Jgr 



Stems rather stout, climbing or j^£r^ Jl&^ 



clambering, 2 to 3 cm. thick, in cultiva- j^^^ ^^* 



tion somewhat branching, light green, the _^a<^^"^ *&!0^ 



growing branches tipped with white ^^^^^~~r 1!^^^^^^^^===^=^^^^ 



hairs; ribs 8 to 10, separated by narrow J ""* ' •i*"-* m *™"^ cS ^^^ s>! ^^^. 



intervals, undulating, with knobby areoles ; Lm_ a ^ ^^^^miiniWifflffi^^^ 



areoles circular, with short tawny felt; ^"^™ m JP^^> lM ^ M ^^ 



spines about 12, conic, stiff, about 1 mm. ^gg^ g^^^s^ - 



long, the 3 or 4 centrals thicker than the ~7 ! ~~ 



somewhat curved or hooked radials; Fig. ^.-Branch of S. kuntlnanus. Xo,. 



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



