. Carnegie Institution of Washington publication. 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 (Pfeiff
. Carnegie Institution of Washington publication. 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, Enum. Cact. 114. 1837) is known only as a synonym of Cereus nycticallus. Cereus rosaceus, 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 pcanii 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 ptcrogonus. 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 maxiniiliani (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 Hclioccreus speciosus. This is a common plant in conservatories. Illustrations: Amer. Garden 11:471; Diet. Gard. Nicholson i: f. 408; Lemaire, Cact. f. ii; Riimpler, Sukkulenten f. 70, 71; Verh. Ver. Beford. Gartenb. io:pl. 4, alias Cereus nycticallus. Plate xxxvin, figure i, shows a fruiting b
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