The Cactaceae : descriptions and illustrations of plants of the cactus family . cous; branches 6 to 10 cm. in diameter; ribs 6 to 8, high, obtuse; areoles rather close together,producing long hairs when young, but no tufts of hairs or wool at flowering time; spines 5 to 10,acicular to subulate, unequal, the longest up to 4 cm. long, brownish or sometimes yellowish; flowers6 cm. long; inner perianth-segments white; fruit depressed, 6 cm. broad; seeds black, shining. Type locality: Not cited. Distribution: Along the sandy coast of Brazil. The synonymy of this coastal species of Brazil is very co
The Cactaceae : descriptions and illustrations of plants of the cactus family . cous; branches 6 to 10 cm. in diameter; ribs 6 to 8, high, obtuse; areoles rather close together,producing long hairs when young, but no tufts of hairs or wool at flowering time; spines 5 to 10,acicular to subulate, unequal, the longest up to 4 cm. long, brownish or sometimes yellowish; flowers6 cm. long; inner perianth-segments white; fruit depressed, 6 cm. broad; seeds black, shining. Type locality: Not cited. Distribution: Along the sandy coast of Brazil. The synonymy of this coastal species of Brazil is very complicated, for it has been con-fused with a Mexican species of uncertain relationship. An attempt is here made to accountfor the various names. Schumann took up the specific name exerens for it, basing it onCereus exerens, an unpublished name of Link. Pilocereus arrabidae Lemaire seems to bethe oldest definite name for the plant. This is not to be confused with Cereus arrabidae(Steudel, Nom. ed. 2. 1: 333. 1840) as it has been in the Index Kewensis. BRITTON AND ROSE, VOL. II. M. E. Eaton del. 1 Top of flowering stem of Cephalocereus arrabidac. 2. Top of flowering stem of Cephalocereus nobilis. 3. Top of flowering stem of Cephalocereus barbadensis. (Natural size.) CEPHALOCEREUS. 43 Schumann refers here Cereus virens Pfeiffer (Enum. Cact. 99. 1837; Pilocereusvirens Lemaire, Illustr. Hort. 13: Misc. 20. 1866), but Pfeiffer really did not propose anew name, although the plant he described may have been different from De Candolles(Mem. Mus. Hist. Nat. Paris 17: 116. 1828), which came from Mexico, for the latter isdefinitely stated to have been sent by T. Coulter from there, and is described as a simple,light green, 5-ribbed plant; it may be a Lemaireocereus. Schumann refers Ccreus sub-lanatus Salm-Dyck (Hort. Dyck. 337. 1834) here, but this reference is to be the two are the same the name sublanatus must be taken up instead of arrabidae. Cereus exerens Link (Pfeiffer,
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Keywords: ., bookauthorbrittonn, bookcentury1900, bookdecade1910, bookyear1919
