androecium


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androecium

the male parts of an ANGIOSPERM flower composed of two or more stamens which, since they are concerned with reproduction, are called essential organs.
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Similarities between flowers of Adenanthemum Conwentz and Itea include that the flowers are hermaphroditic, pedicellate, have a pentamerous and actinomorphic perianth with distinct whorls of sepals and petals, a valvate corolla, a haplostemonous androecium with antesepalous stamens, dorsifixed anthers with introrse dehiscence, a superior ovary (ovary position is variable in Itea), two fused styles, and a single, capitate stigma (Conwentz, 1886; Kubitzki, 2007a).
5-1 cm in length, sessile pedicellate, unisexual or bisexual, corolla 4-6-merous; stamens longer than they are wide, male flowers bearing dimorphic stamens, 3 major and 3 minor alternating with each other, anthers versatile dorsifixed; female flowers with nectar glands encircling the atrophied gynoecium and androecium.
1) Organ categories are affected in various combinations: all organs (in large groups with most conspicuous monosymmetry), or mainly calyx and corolla, or mainly only one organ category (calyx, corolla, androecium, or gynoecium).
The hermaphrodite plant has perfect flowers with 10 heteronomous stamina which compose the androecium and an ovary with five partite-stigmas.
the form of a "blossom" like that of Rubus fruticosus with calyx, corolla, androecium, and gynoecium, Chrysanthemum leucanthemum, a capitulum engendered by an involucrum, ligulate flowers and a disk of tubular flowers, or even a double capitulum like those by Troll (1928) used examples of Syncephalantha decipiens or Myriocephalus gracilis developed from densly aggregated capitulae which develop the ligulate flowers only in peripheral position of the whole aggregation (Figs.
In flowers, GUS activity was restricted to the apical half of sepals, the vasculature of petals, the anther sac and pollen grains of the androecium, and the stigma and style of the gynoecium (histochemical data not shown).
Androecium of 4 stamens, didynamous, filaments 30-32 mm long, adnate to the corolla tube for 15-17 mm, white, glabrous, coiling after anthesis; staminode absent; anthers sagittate, 5-6 x 2-3 mm, coherent by the lateral walls, dehiscence by basal pores that develop into longitudinal slits.
Floral organogenesis in Chloranthus sessilifolius (Chloranthaceae): with special emphasis on the morphological nature of the androecium of Chloranthus.
The androecium is formed by ten stamens with orbicular anthers with rimose dehiscence.
Staminate flowers, androecium and pollen of Siparuna aspera (Siparunaceae) were examined by using light and electron-microscopy techniques.
Anthers were removed manually with the help of fine pointed forceps without cutting lemma and palea, unlike conventional practice which involves cutting of glumes to expose the androecium.