. Class-book of botany : being outlines of the structure, physiology and classification of plants : with a flora of the United States and Canada. Botany; Botany; Botany. Okdbb 112.—KUPHORBIACEi*. » 625 bat lose* its deleterious properties by washing and exposure to beat. Castor-oil is expressed from tlio seeds of Ricinus communis. Cruton-oil from the seeds of Croton Tiglium. Caoutchoug is yielded in abundance by several S. American species. FIG. 697.—1. Head or eapituluni of En- Qp phorbiacorollata; with the corolla-lite in- volucre, and pedicellate pistillate flower. 2. Tho involucre tube cut
. Class-book of botany : being outlines of the structure, physiology and classification of plants : with a flora of the United States and Canada. Botany; Botany; Botany. Okdbb 112.—KUPHORBIACEi*. » 625 bat lose* its deleterious properties by washing and exposure to beat. Castor-oil is expressed from tlio seeds of Ricinus communis. Cruton-oil from the seeds of Croton Tiglium. Caoutchoug is yielded in abundance by several S. American species. FIG. 697.—1. Head or eapituluni of En- Qp phorbiacorollata; with the corolla-lite in- volucre, and pedicellate pistillate flower. 2. Tho involucre tube cut open, showing J the monandrous, staminato flowers snr- yjj rounding the pistillate. 8. One of tho. \0 & flowers, with a toothed bract Bt base. 4. l Cross section i of tho ovary, showing the 3 one-seeded cells or carpels. Ob». Our specimens of the Euphorbiaeoie wcro submitted to tho Inspection of Dr. Engeluiann, of St. Louis, and are hero described nearly In accordance with his nomenclature. GEXERA. { Colls of the ovary one-ovulcd ; fruit 3 (rarely 2 or l)-sooded. (*) * Flowers In a cup-shaped involucre, the I many, each merely a stamen, with ono 9 flower, an ovary exserted on a pedicel Euphorbia. 1 * Flowers not in aninvolucro 8, all apetalous, having a calyx only, (a) a Flowers diandrous, in a terminal spike. Plants glabrous 2 a Flower 2 to 8-androus, in racemes. Plants hairy or downy Tbagia. .'! a Flowers S to 12-androus, in small spikes with largo bracts Acalypiia . 4 a Flowers 10 to 15-androus, in cymes, with white sepals. Stinging Oniuoscolus. ' a Flowers polyandrous, in panicles ; fruit cchlnate. Plant glabrous Ricinus. 0 * Flowers not in an involucre 8, the sterile and often the fertile, also with petals, (b) b Ova. 8 (rarely 2)-oellcd and seeded. Fls. clustered. "Woolly, downy or 7 b Ova. 1-celled, 1-seeded, indehiscent. Fls. axillary, small. Silvery S § Cells of tho> ovary 2-ovuled ; fruit C (or aborti
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectbotany, bookyear1861
