. 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. 108 THE OVULES. often wide spaces covering large portions of ihe walla of the cell, aa in poppy, water-lily, and in other cases, as Datura^ they become large and fleshy, nearly fill- ing the ceU. \ 628. A FREE AxiLE PLACENTA, without dissepiments, occurs in some compound, one-celled ovaries, as in tte pink and primrose orders. This , anomalyis explained in two ways : first, by the obliteration of the early formed dissepiment'
. 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. 108 THE OVULES. often wide spaces covering large portions of ihe walla of the cell, aa in poppy, water-lily, and in other cases, as Datura^ they become large and fleshy, nearly fill- ing the ceU. \ 628. A FREE AxiLE PLACENTA, without dissepiments, occurs in some compound, one-celled ovaries, as in tte pink and primrose orders. This , anomalyis explained in two ways : first, by the obliteration of the early formed dissepiment's, as is actually seen to occur in the pints ; secondly, by supposing the placenta to be, at least in some cases, an axial rather than a marginal growth; that is, to grow from the point of the axis rather than from the margin of the carpellary leaf, for in primros* no dissepiments ever appear. 404 89S 405. 89S. Sauiolus Valornndi, section of flower showing tlie free axile placenta. 399, Ovary of Scropliulariaceje. 400, Ovary of Tulip. 401, Cross-section of ovary of Flax, 6-celled, falsely lO-celled. 403, Ovary of Violet, 1-celled. 403, Ovary of ruchsia, 4-celle(l. 404, Ovary of rock- rose, 1-celled, 6-carpelled. 405. Gentianaceas, 2-valved, 1-celled. 529. A FEW PECULIAR FORMS of the Style and stigma are worthy of note in our narrow limits, as the lateral style of strawberry, the basilar style of the Labiatse and Borrageworts, the branching style of Emblioa, one of the Enphorbiaceae; also, 530. The globular stigma of MirabUis; the linear stigma, of G^romia; the feathery stigma of grasses; the filiform stigma of Indian com; the lateral stigma of Aster; the petaloid-stigmas of Iris; the hooded stigma of violet'(3'ri—379). 531. Stigma wanting. In the pine, cedar, and the Coniferse generally, both the style and stigma are wanting, and the ovary is represented only by a fiat, open, carpellary scale bearing the naked ovules at its base. THE OVULES. 532. Theie nature. Destined to bec
Size: 2298px × 1087px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, bookpublisher, booksubjectbotany
