. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 476 EUPHORBIACEAE. Vol. II. 17. POINSETTIA Graham, Edinb. N. Phil. Journ. 20: 412. 1836. Annual or perennial herbs or shrubby plants, with green or partially, often more highly colored, foliage. Stems simple or branched, often irregularly so. Leaves alternate below, opposite above, similar throughout or very variable; stipules gland-like. Involucres in axil- la
. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 476 EUPHORBIACEAE. Vol. II. 17. POINSETTIA Graham, Edinb. N. Phil. Journ. 20: 412. 1836. Annual or perennial herbs or shrubby plants, with green or partially, often more highly colored, foliage. Stems simple or branched, often irregularly so. Leaves alternate below, opposite above, similar throughout or very variable; stipules gland-like. Involucres in axil- lary or terminal cymes or solitary; lobes fimbriate. Glands fleshy, solitary, or rarely 3 or 4, sessile or short-stalked, without appendages, the missing ones represented by narrow lobes. Capsule , the lobes rounded. Seed narrowed upward, tuberculate, without a caruncle or with a minute one only. [In honor of Joel Roberts Poinsette, of South Carolina.] About 12 species, mostly natives of tropical America. Type species: Poinsettia pulcherrima (Willd.) Graham. Glands of the involucre stalked ; leaves nearly or quite uniform. Leaves linear or linear-lanceolate ; seeds narrowly ovoid, not prominently tuberculate. 1. Leaves ovate or ovate-lanceolate ; seeds broadly ovoid, prominently tuberculate, 2. P. dentata. Glands of the involucre sessile ; leaves various. 3. P, heterophylla. Poinsettia cuphosperma (Engelm.) Small. Warty Spurge. Fig. Euphorbia dentata var. cuphosperma Engelm. Bot. Mex. Bound. Surv. 190. 1859. Euphorbia cuphosperma Boiss. in DC. Prodr. 15 : Part 2, yi. 1862. Poinsettia cuphosperma Small, Fl. SE. U. S. 721. 1903. Annual, usually sparingly pubescent. Stem erect, slender, simple, or sparingly branched, 8-15' high. Leaves opposite or alternate, linear, oblong, or linear- lanceolate, io"-3' long, entire, undulate, or denticu- late, narrowed into a slender petiole; involucres crowded at the ends of the branches, nearly sessile, glabrou
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