. Class-book of botany: being outlines of the structure, physiology and classification of plants; with a flora of the United States and Canada. Botany; Plants; Plants. Order 112.—EUPHORBIACEjE. C25 but lofo* its deleterious properties by washing and exposuro to heat. Castor-nil is oppressed from tlie seeds of Iiicinus communis. Croton-oil from the seeds of (Jroton 'i'lglium. Caoutchouo is yielded in abundance by several S. American species. FIG. 687.—1. Head or capitulum of En phorbiacorollata; with the corolla-like in- volucre, ami pedicellate pistillate flower. 2. The involucre tube cut open
. Class-book of botany: being outlines of the structure, physiology and classification of plants; with a flora of the United States and Canada. Botany; Plants; Plants. Order 112.—EUPHORBIACEjE. C25 but lofo* its deleterious properties by washing and exposuro to heat. Castor-nil is oppressed from tlie seeds of Iiicinus communis. Croton-oil from the seeds of (Jroton 'i'lglium. Caoutchouo is yielded in abundance by several S. American species. FIG. 687.—1. Head or capitulum of En phorbiacorollata; with the corolla-like in- volucre, ami pedicellate pistillate flower. 2. The involucre tube cut open, showing. J tho monandrous, staminatc flowers sur- ¥/ rounding tli „ the pistljlate. 8. One of tho »)(/ & flowers, with a toothed bract at base. 4. Cross section of tho ovary, showing the 3 one-seeded cells or carpels. 0!'K. Our specimens of the Enphorbiacea? were submitted to the inspection of Dr. Engelmann, «{ St. Louis, and arc here described nearly in accordance with his nomenclature. GENERA. § Cells of tho ovary one-ovuled ; fruit 3 (rarely 2 or l)-soeded. (*) * Flowers in a cup-shaped involucre, the $ many, each merely a stamen, with ono $ flower, an ovary exsertod on a pedicel Euphorbia. 1 * Flowers not in nninvolucro a, all apetalous, having a calyx only, (a) a Flowers diandrous, in a terminal spike. Plants glabrous Stillingia. 8 a Flower 2 to 8-androus, in racemes. Plants hairy or downy TeaGia. 8 a Flowers S to 12-audrous, in small spikes with largo bracts Acalvimia. 4 a Flowers 10 to 15-androus, In cymes, with white sepals. Stinging CnidoscoluB. 5 a Flowers polyandrous, in panicles ; fruit echinate. Plant glabrous Lioinus. t, * Flowers not in an involucre 8, tho sterilo and often the fertile, also with petals, (b) b Ova. 3 (rarely 2)-celled and seeded. Fls. clustered. Woolly, downy or 7 b Ova. 1-celled, 1-secded, indehiseent. Fls. axillary, small. Silvery 8 5 Cells of tho ovary 2-ovuled ; fruit C (or abortively fewer)
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Keywords: ., bookcentury1800, booksubjectbotany, booksubjectplants, bookyear18
