The elements of botany for The elements of botany for beginners and for schools elementsofbotany00gray Year: 1887 Fig. 331, 332. Pistil of a Sandwort, with vertical and transverse section of the ovary : free central placenta. Fig. 333. Plan of a one-celled ovary of three carpel-leaves, with parietal pla- centae, cut across below, where it is complete; the upper part showing the top of the three leaves it is composed of, approaching, but not united. Fig. 334. Cross section of the ovary of Frost-weed (Helianthemum), with three parietal placentae, hearing ovules. Fig. 335. Cross section of an ov
The elements of botany for The elements of botany for beginners and for schools elementsofbotany00gray Year: 1887 Fig. 331, 332. Pistil of a Sandwort, with vertical and transverse section of the ovary : free central placenta. Fig. 333. Plan of a one-celled ovary of three carpel-leaves, with parietal pla- centae, cut across below, where it is complete; the upper part showing the top of the three leaves it is composed of, approaching, but not united. Fig. 334. Cross section of the ovary of Frost-weed (Helianthemum), with three parietal placentae, hearing ovules. Fig. 335. Cross section of an ovary of Hypericum graveolens, the three large pla- centae meeting in the centre, so as to form a three-celled ovary. 336. Same in fruit, the placenta; new separate and rounded.
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