. Foundations of botany. Fig. 87. But the studentmust not understand by this statement that the littlepistil leaf grows at first like an ordinary leaf and finallybecomes folded in. The united leaf-margins near the tipwould form the stigma, and the placenta would correspondto the same margins, rolled slightly inwards, extendingalong the inside of the inflated leaf-pouch. Place severalsuch folded leaves upright about a common center, andtheir cross-section would be much like that of B in Evidence that carpels are really formed in this waymay be gained from the study of such fruits as th
. Foundations of botany. Fig. 87. But the studentmust not understand by this statement that the littlepistil leaf grows at first like an ordinary leaf and finallybecomes folded in. The united leaf-margins near the tipwould form the stigma, and the placenta would correspondto the same margins, rolled slightly inwards, extendingalong the inside of the inflated leaf-pouch. Place severalsuch folded leaves upright about a common center, andtheir cross-section would be much like that of B in Evidence that carpels are really formed in this waymay be gained from the study of such fruits as that ofthe monkshood (Fig. 168), in which the ripe carpels maybe seen to unfold into a shape much more leaf-like thanthat which they had while the pistil was maturing. What 1 The anther answers exactly to the spore-cases of the ferns and theirallies, while the filament is a small specialized leaf to support it. For afuller statement, see Potter and Warmings Systematic Botany, pp. 236, 237. TRUE NATURE OF FLORAL ORGANS 211.
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