An illustrated flora of the 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 102nd meridian ed2illustratedflo02brit Year: 1913 3. Poinsettia heterophylla (L.) Kl. & Garcke. Various-leaved Spurge. Fig. 2768. Euphorbia helerophylh L. Sp. PI. 453. I753- P. heterophylla Kl. & Garcke, Monatsb. Akad. Berlin 1859 â ^53- Annual or biennial, bright green, pubescent or nearly glabrous. Stem mostly erect, I°-3° tall, woody below, with the branches a
An illustrated flora of the 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 102nd meridian ed2illustratedflo02brit Year: 1913 3. Poinsettia heterophylla (L.) Kl. & Garcke. Various-leaved Spurge. Fig. 2768. Euphorbia helerophylh L. Sp. PI. 453. I753- P. heterophylla Kl. & Garcke, Monatsb. Akad. Berlin 1859 â ^53- Annual or biennial, bright green, pubescent or nearly glabrous. Stem mostly erect, I°-3° tall, woody below, with the branches ascend- ing, or the lower spreading, leafy at the ends; leaves alternate, very variable, linear to orbicu- lar, entire, undulate, sinuate or dentate, the uppermost often fiddle-shaped and blotched with red; all slender-petioled; involucres clus- tered at the ends of branches, ij' long, about equalling the peduncles; cleft into 5 ovate or oblong laciniate lobes, the sinuses bearing i or several sessile glands without appendages; capsule glabrous or minutely pubescent, 3' in diameter; seeds oblong-ovoid, li ' long, trans- versely wrinkled and tuberculate. Illinois to South Dakota, Florida. Kansas and Texas. Tropical America. April-Nov. Family 71. CALLITRICHACEAE Lindl. Nat. Syst. Ed. Water Sjarwort Family. Herbaceous aquatic or rarely terrestrial plants, with slender or capillary stems, opposite entire spatulateor linear leaves, and minute perfect or monoe- cious axillary flowers. Perianth none. Bracts 2, sac-like or none. Stamen i ; filament elongated, filiform; anthers cordate, 2-celIed, opening by lateral slits. Pistil I ; ovary 4-celled; ovules i in each cavity; styles 2, filiform, papillose nearly the whole length. Fruit compressed, lobed, the lobes more or less winged or keeled on the margins, separating at maturity into 4 flattish i-seeded carpels. Seed anatropous, pendulous; endosperm fleshy; embryo straight or slightly curved, nearly as long as the endos
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