. Class-book of botany : being outlines of the structure, physiology, and classification of plants ; with a flora of the United States and Canada . Botany; Botany; Botany. 102 THE STAMENS, OR ANDBECI0M. 502. Staminodia, or sterile filaments with abortive anthers or none, occur singly in many of the Pigworts and Labiates, or in entire whorls next within the petals, alternating with them, as in loose-strife; in all cases restoring the symmetry of the flowers. They are generally reduced in size, as in Sorophularia, rarely enlarged, as in beardtongue (Pentstemon). 503. The kumbee of the stamens is
. Class-book of botany : being outlines of the structure, physiology, and classification of plants ; with a flora of the United States and Canada . Botany; Botany; Botany. 102 THE STAMENS, OR ANDBECI0M. 502. Staminodia, or sterile filaments with abortive anthers or none, occur singly in many of the Pigworts and Labiates, or in entire whorls next within the petals, alternating with them, as in loose-strife; in all cases restoring the symmetry of the flowers. They are generally reduced in size, as in Sorophularia, rarely enlarged, as in beardtongue (Pentstemon). 503. The kumbee of the stamens is said to be definite when not ex- ceeding twenty, as is sometimes definitely expressed by such terms as follow, compounded by the Greek numerals, viz., monandrous, having one stamen to each flower ; diandrous, with two stamens ; pentandroiis, with five stamens. If the number exceeds twenty, it is said to be in- definite (denoted thus, cx) ) or polyandrous. 504. The position or insertion of the stamens (§ 463) maybe more definitely stated here, as hypogynous, ou the receptacle below the ovaries; perigynous, on the calyx around the ovary ; q->ipetalous, on the corolla, as in Phlox ; epigynous, on the ovary at its summit, and gynandrous {yvvTJ, pistil, dv6peg, stamens) on the pistil, that is, when the stamens are adherent to the style, as in Orchis. 505. Inequality in length is definitely marked in two cases, as tetradynamous (rs-pag, four, dyvafug, power) when the stamens are six, whereof four are longer than the other two, as in all the Crucifers; didynamous, where the stamens arc four, two of them longer than the other two, as in all the Labiates, etc. 865 864 868 862. 502, CoUlnsia vern,i: f, a flower enlarged, cut, showing; tbo sllglilly dlrlynamous stamens, etc 368, SUmens () of a Leguminous plant, 304, Stamens (sysgenecious) of a Com- posite ; /, filaments distinct; a, anthers united ; s, stigmas revolute, etc. 365, Tetradynamous •tamens of a Craclfer. 366
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