. 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 portiona of ihe walls of the cell, as in poppy, water-lily, and in other cases, as Datura, they become large and fleshy, nearly fill- ing the cell. 528. A FREE AXiLE PLACEKTA, without dissepiments, occurs in some compound, one-celled ovaries, as in the pink and primrose orders. This anomaly is explained in two ways : first, by the obliteration of the early formed dissepiments,
. 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 portiona of ihe walls of the cell, as in poppy, water-lily, and in other cases, as Datura, they become large and fleshy, nearly fill- ing the cell. 528. A FREE AXiLE PLACEKTA, without dissepiments, occurs in some compound, one-celled ovaries, as in the pink and primrose orders. This anomaly is explained in two ways : first, by the obliteration of the early formed dissepiments, as is actually seen to occur in the pinks ; 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 primrose no dissepiments ever appear. 404 898 405. 598. Samolus Valorandi, section of flower showing the free axilo placenta, 399, Ovary of Scrophulariaceaj. 400, Ovary of Tulip. 401, Cross-section of ovary of Flax, 5-celled, falsely lO-ccUed. 403, Ovary of Violet, 1-celled. 403, Ovary of Fuchsia, 4-celled. 404, Ovary of rock- rose, 1-celled, 5-carpelled. 405 Gentianacese, 2-valved, l-celled. 529. A FEW PEonLlAR 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 Labiatae and Borrageworts, the branching style of Bmblica, one of the Euphorbiacese; also, 530. The globular stigma of Mirabilis; the linear stigma of Gyromia; 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 (371—3T9). 531. Stigma wanting. In the pine, cedar, and the Conifers generally, both the style and stigma are wanting, and the ovary is represented only by a flat; open, carpellary scale bearing the naked ovules at its base. THE OVULES. 532. Their nature. Destined to become seeds
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