The Cactaceae : descriptions and illustrations of plants of the cactus family . orster and Schu-mann did not know the species. 5. Cephalocereus dybowskii (Gosselin). Cereus dybowskii Gosselin, Bull. Soc. Bot. France 55: 695. much branched at the base, sending up many strict, usually simple branches 2 to 4meters high, 8 cm. in diameter, almost hidden by the white cobwebby hairs of the areoles; ribsnumerous, often 23, low; pseudocephalium on the west side of the plant, consisting of a mass of longwhite wool extending from the top of the branch downward sometimes for 5 to 6 dm.; spines
The Cactaceae : descriptions and illustrations of plants of the cactus family . orster and Schu-mann did not know the species. 5. Cephalocereus dybowskii (Gosselin). Cereus dybowskii Gosselin, Bull. Soc. Bot. France 55: 695. much branched at the base, sending up many strict, usually simple branches 2 to 4meters high, 8 cm. in diameter, almost hidden by the white cobwebby hairs of the areoles; ribsnumerous, often 23, low; pseudocephalium on the west side of the plant, consisting of a mass of longwhite 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 2series; stamens in upper series with short filaments or none; stamens in lower series united at baseinto a short tube; style slender, cream-colored, cm. long; stigma-lobes about 15, linear; fruitglobular, naked, pinkish, cm. in diameter; seeds black, Fig. 30.—Cephalocereus dybowskii. Type locality: Itumirin, Bahia, Brazil. Distribution: Common on the dry hills in Bahia, where it forms dense thickets some-times to the exclusion of all other plants. Our description is based largely on the specimens collected by Dr. Rose at Barrinha,Bahia, in 1915 (No. 19785). In Bahia this species is called cabeca branca or mandacaru de penacho. Figure 30 is from a photograph taken at Barrinha, Bahia, by Paul G. Russell in 1915. CEPHALOCEREUS; 31 6. Cephalocereus macrocephalus Weber in Schumann, Gesamtb. Kaktecn 197. 1897. Pilocereus macrocephalus Weber, Diet. Hurt. Bois 066. macrocephalus Berger, Rep. Mo. Bot. Gard. 16:62. 1905. Plant of great size, 10 to 16 meters high, with a very solid woody trunk 3 to 6 dm. in diameter,simple or with a few ascending branches; pseudocephalium not so conspicuous as in Cephalocereus senilis: ribs numerous (about 24), low,
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Keywords: ., bookauthorbrittonn, bookcentury1900, bookdecade1910, bookyear1919
