. Notes on the life history of British flowering plants. Botany; Plant ecology. —LYTHRARIE^ 191 HiPPURIS The minute flowers are ^Yitllout petals. The leaves are entire. H. vulgaris (Mare's Tail).—Grenier and Godron mention ^ a specimen in which the leaves were arranged spirally instead of in whorls. LYTHEAEIE^ Lythrum We have two British species—L. Salicaria, with upright stems and reddish-purple flowers; and L. hyssopifolia, small and decumbent, with minute petals. L. Salicaria has three distinct forms of flower, which were already recorded by Vaucher, while their functions and rela
. Notes on the life history of British flowering plants. Botany; Plant ecology. —LYTHRARIE^ 191 HiPPURIS The minute flowers are ^Yitllout petals. The leaves are entire. H. vulgaris (Mare's Tail).—Grenier and Godron mention ^ a specimen in which the leaves were arranged spirally instead of in whorls. LYTHEAEIE^ Lythrum We have two British species—L. Salicaria, with upright stems and reddish-purple flowers; and L. hyssopifolia, small and decumbent, with minute petals. L. Salicaria has three distinct forms of flower, which were already recorded by Vaucher, while their functions and relations were first explained by Darwin. He distinguished them according to the length of their style, as long-styled (Fig. 135), mid-styled (Fig. 13G), and short-styled (Fig. 137). In this species it is remark- able that the seeds of the three forms diff'er from one another, 100 of the long-styled seeds being equal to 121 mid-styled or 142 short-styled. The pollen grains also not only differ in size, the long stamens having the largest pollen grains, the middle- sized stamens middle - sized pollen grains, and the short stamens small fig. 134.—inflorescence pollen grains, but also in colour, being te^^i^" ^"""''"''' green in the longer stamens and yellow in the shorter ones, while the filaments are pink in the long stamens, uncoloured in the shorter ones. Darwin ^ Flore de France, vol. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lubbock, John, Sir, 1834-1913. London, New York, Macmillan and Co. , Ltd.
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