. The natural history of plants. Botany. 132 NATURAL HISTORY OF PLANTS. panied by a flesliy aril, and an abundant oily albumen surrounding an embryo with cylindrical-conical radicle, and large foliaceous cotyledons. There are some species of Croton diflPering from those we have just described by a slight inequalty of their pieces of the calyx, and by the extremely variable number of those forming the andro- ceum. This may be isostemonous; but it more Crotm peuiciUatum. frequently presents four or a greater number of verticils (fig. 203), whose pieces are alternately superposed to those of the
. The natural history of plants. Botany. 132 NATURAL HISTORY OF PLANTS. panied by a flesliy aril, and an abundant oily albumen surrounding an embryo with cylindrical-conical radicle, and large foliaceous cotyledons. There are some species of Croton diflPering from those we have just described by a slight inequalty of their pieces of the calyx, and by the extremely variable number of those forming the andro- ceum. This may be isostemonous; but it more Crotm peuiciUatum. frequently presents four or a greater number of verticils (fig. 203), whose pieces are alternately superposed to those of the calyx and the corolla, the interior verticil being complete or incom- plete ; or the number of stamens may increase in each verticil. This genus contains some Kg. 203. Male flower (?). fo^jj, hundred and fifty species \ arborescent, frutescent, or herbaceous, rarely annual. The leaves are almost always alternate, with or without stipules, the latter being often glanduliform. The limb, penninerved or 3-5-pli- nerved, often entire, is sometimes dentate or lobed. It is rarely glabrous, much oftener covered with simple, stellate, peltate, or scaly hairs; here and there it bears glands whose situation is extremely variable.^ The flowers are in terminal or axillary, simple or ramified racemes or spikes, composed of cymes or glomerules. When they are monoe- cious, the females, generally few in number, occupy the axils of the inferior bracts of the inflorescence. Beside Croton are placed three American genera, with the same general organisation of the androceum, but easily distinguished: Julocroton^ by its resupinate flower, with two unequal sepals behind, and another (generally the most developed) in front; Crotonopsis, by its ovary reduced to one uniovulate cell, and the small fruit remain- ing dry and indehiscent; and Eremocm'pus, by its dry one-celled fruit dehisciag in two valves, while the calyx disappears in the female flowers, and the corolla in those of both sexes. ' M. Ako. F
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1871
