Introduction to structural and systematic botany, and vegetable physiology, : being a 5th and revedof the Botanical text-book, illustrated with over thirteen hundred woodcuts . istinction between simple and compound pistils require to be wellunderstood. Commencing, therefore, with the most natural forms,and proceeding gradually to the more complex or disguised, we firstconsider 542. The Simple Pistil, and the way in which it answers to a simple pistil answers to a single leaf. A compound pistil answersto two or more leaves combined, just as a monopetalous corollaanswers to two or more p
Introduction to structural and systematic botany, and vegetable physiology, : being a 5th and revedof the Botanical text-book, illustrated with over thirteen hundred woodcuts . istinction between simple and compound pistils require to be wellunderstood. Commencing, therefore, with the most natural forms,and proceeding gradually to the more complex or disguised, we firstconsider 542. The Simple Pistil, and the way in which it answers to a simple pistil answers to a single leaf. A compound pistil answersto two or more leaves combined, just as a monopetalous corollaanswers to two or more petals, or leaves of the flower, united intoone body. As to its morphology, the botanist regards a simplepistil as consisting of the blade of a leaf, curved inwards until itsmargins meet and unite, forming in this way a closed case, or pod,which is the ovary. So that the upper face of the altered leafanswers to the inner surface of the ovary, and the lower, to itsouter surface. And the ovules are borne on what answers to theunited edges of the leaf. The tapering summit, rolled togetherand prolonged, forms the style, when there is any; and the edges THE SIMPLE PISTIL. 289. of the altered leaf turned outwards, either at the tip or along theinner side of the style, form the stigma. This will be clearly un-derstood on comparing Fig. 342 and Fig. 491, which are pistilstransversely divided, with Fig. 490, a leaf curved inwards until itsmargins nearly meet, and with , a simple pistil of Caltha orMarsh-Marigold which has matured,split open along the inner side todischarge the seeds it bore, andspread out into the shape of a leaf. 543. The line formed by the unionof the margins of the leaf is calledthe Inner or Ventral Suture, andalways looks towards the axis of theflower. This is a true suture, or seam, as the word denotes. The opposite line, answering to the mid-rib, is sometimes apparent as a thickened line, and is termed theOuter or Dorsal Suture. The ovules or young seeds are
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Keywords: ., bookauthorgra, bookcentury1800, bookdecade1860, booksubjectbotany
