A Manual of Botany : Being An Introduction to the Study of the Structure, Physiology, And Classification of Plants
The book A Manual of Botany : Being An Introduction to the Study of the Structure, Physiology, And Classification of Plants was written by author John Hutton Balfour Here you can read free online of A Manual of Botany : Being An Introduction to the Study of the Structure, Physiology, And Classification of Plants book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Manual of Botany : Being An Introduction to the Study of the Structure, Physiology, And Classification of Plants a good or bad book?
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411), and in Plantago saxatilis (fig. 412), where it is bilateral. Occasionally, as in Tasmannia, it is prolonged along the whole inner surface of the style. In Iris it is situated on a cleft on the back of the petaloid divisions of the style. Some stigmata, as those of the Mimulus, present sensitive flattened laminse, which close when touched. The Fig. 439. Fig. 439. Femaleflowerof Bmtlica officinalis, one of the Enphorbiaceffi. c, Calyx, pp. Petals, tt Membranous tube surromiding the ovary, o.... Ovary, crowned by three styles, s, each being twice bifurcate. ESSENTIAL OEGANS — THE STIGMA. 249 stigma consists of loose cellular tissue, and secretes a viscid matter ■which detains the pollen, and causes it to protrude tubes. This secreting portion is, strictly speaking, the true stigma, but the name is generally applied to all the divisions of the style on which the stigmatic apparatus is situated, as in Labiatse. The stigma alternates with the dissepiments of a syncarpous pistil, or, in other words, corresponds with the back of the loculaments ; but ia some cases it would appear that half the stigma of one carpel unites with half that of the contiguous carpel, and thus the stigma is opposite the dissepi- ments, that is, alternates with the loculaments.
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