androecium


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androecium

[‚an′drēsh·ē·əm]
(botany)
The aggregate of stamens in a flower.
References in periodicals archive ?
5 mm 3-8 mm dichasial peduncle Calyx, corolla 4 or 5 5 and androecium merosity Sepal margins erose entire Samara two-celled, one-seeded, one-celled, one-seeded, 16-19 x 5-6 mm, 20-28 x 7.
assimetric; sepals green to green-vinaceous, deltoid to ovate or ovate to elliptic, abaxial surface glabrous, 18-36 X 7-18 mm; petals golden yellow, two external, ovate, 14-36 X 7-21 mm, two internal, orbicular, 12-31 X 8-22 mm, cuculus obovate to elliptic, bent around the androecium, 12-27 X 07-13 mm; stamens light yellow, 6-24 mm long; staminoids 3-5 mm long; ovary light green, pubescent, 16-33 mm long; style light green, 2-5 mm long.
with an inner ring of nectarigenous trichomes between the androecium and the petals; petals greenish white, triangular, 0.
In addition, the androecium is often differentiated into middle length stamens with nutritive anthers (medium), that provide food for pollinators, and long length stamens with pollinating anthers (long), that provide pollen that is deposited on the stigma (Van der Pijl 1954, Faegri and van der Pijl 1966, Proctor and Yeo 1973).
12 cm, apex obtuse, clavate, slightly separated only along the neck during anthesis, outer surface densely laciniate, the laciniae to 2 mm long, membranous, patent or pointing backwards, the entire outer surface (including the laciniae) puberulous, the proximal half bright red, the distal half yellow, the inner surface finely puberulous and with a narrowly triangular ligule to 4 mm long at the base of each petal; androecium formed by two alternating series of long and short stamens halfway attached to the petals, anthers oblong, tetralocular, 2-2.
Each flower is characterized by an actinomorphic, pentamerous perianth composed of a whorl of sepals and a whorl of petals, a haplostemonous androecium with antesepalous stamens, and a bicarpellate gynoecium; the styles of the flowers are fused to free, and the single stigma is capitate.
Androecium of 4 stamens, the filaments 2 cm long, pilose with unicellular trichomes, basally connate by 0.
Nectaries of Chamaesyce, in which nectaries occur in the inflorescence, as in Euphorbia (So 2004) and Poinsettia, but are morphologically extrafloral (the cyathium being comprised of individual flowers of gynoecium or androecium only) might function in pollination as well as potential anti-herbivore defense, depending on the ecological context.
Fruit abortion and those not filled normally result from pollen sterility and reduced pollination resulting from altered androecium architecture following nonrecommended glyphosate treatments (Pline et al.
Investment in the perianth is greater than that for the androecium or gynoecium, and investment in male and female allocation is nearly equal (tables 3, 4).
Flowers unisexual or bisexual, 4-5-6-merous, bracteates or not; epicalyx entirely in the form of a sheath; androecium isomerous, stamens epipetalous, stigma and style undivided.