. Carnegie Institution of Washington publication. Tlllv CACTACEAE. Vcllozo, Fl. Flum. 5: pi. 20, as (.'<;</».v niclo, .//'//<;/<v/r».v iiiclocactus; Mo- natsschr. Kakteenk. 3: 25, as Piloccrcus mclocactits. Figure 29 is from a photograph taken at Rio de Janeiro by Paul G. Russell in 1915; figure 26 shows the fruit as drawn by A. Lofgren. Cereus ferox Haworth (Phil. Mag. 7:109. 1830) may bo of this relationship. It is described as upright, stout, oblong, terete, 9 inches high, 2 inches in diameter, dark green; ribs about 18, densely covered with spreading yellow spines; radial spine
. Carnegie Institution of Washington publication. Tlllv CACTACEAE. Vcllozo, Fl. Flum. 5: pi. 20, as (.'<;</».v niclo, .//'//<;/<v/r».v iiiclocactus; Mo- natsschr. Kakteenk. 3: 25, as Piloccrcus mclocactits. Figure 29 is from a photograph taken at Rio de Janeiro by Paul G. Russell in 1915; figure 26 shows the fruit as drawn by A. Lofgren. Cereus ferox Haworth (Phil. Mag. 7:109. 1830) may bo of this relationship. It is described as upright, stout, oblong, terete, 9 inches high, 2 inches in diameter, dark green; ribs about 18, densely covered with spreading yellow spines; radial spines about 6; central spines 4 or 5, one twice as long as the others, much stouter, up to an inch long. This species was introduced from Brazil by Loddiges, in whose collection it was seen and described by Haworth. It is stated to be near Cereus multangularis. Forster and Schu- mann did not know the species. 5. Cephalocereus dybowskii (Gosselin). Cereus dybowskii Gosselin, Bull. Soc. Bot. Kraiici; 55: 695. 1908. vStems much branched at the base, sending up many strict, usually simple branches 2 to 4 meters high, 8 cm. in diameter, almost hidden by the white cobwebby hairs of the areoles; ribs numerous, often 23, low; pseudocephalium on the west side of the plant, consisting of a mass of long white wool extending from the top of the branch downward sometimes for 5 to 6 dm.; spines yellow, the radials short, hidden in the white hairs, the central spines 2 or 3, porrect, acicular, 2 to 3 cm. long; flower opening at night, 4 cm. long; inner perianth-segments white, broad, short; stamens in 2 series; stamens in upper series with short filaments or none; stamens in lower series united at base into a short tube; style slender, cream-colored, cm. long; stigma-lobes about 15, linear; fruit globular, naked, pinkish, cm. in diameter; seeds black, FIG. 30.—Cephalocercus dybowskii. V'r/v locality: Itumirin, Bahia, Brazil. Distribution: Common on the dry hills in Bahia,
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