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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(2004) scored stamen number (character 110) in Chloranthistemon and Chloranthus as unknown, to avoid assuming whether the tripartite androecium arose by fusion of three stamens or by splitting of one.
1 cm diam., asymmetric; pedicel 2-5 mm long; sepals green, oblanceolate to falcate or ovate, abaxial surface pilose, 3-6 X 2.5-5 mm; petals yellow, two internal and two external, obovate 4.5-6 x 1,5-3 mm long, cuculus oblong, bent around the androecium, 5.5-7 X 5-6 mm long; 10 stamens yellow 2-5 mm long; without staminoids; ovary yellow to white, panose, 4-9 mm long; style yellow, 2-3 mm long.
Androecium. The anthers are appendiculated and dehisce by apical slits which open or close according to ambient humidity (Fig.
The axillary flowers contain androecium comprising 3 stamens (Kumar et al.
Androecium of five stamens alternate to the corolla lobes with short filaments and elongated anthers.
Androecium of 4 stamens, the filaments 2 cm long, pilose with unicellular trichomes, basally connate by 0.5 cm forming a folded and dorsally open staminal blade; anther sagittate, 1.5 x 1.5 mm, the connective subquadrate, 1.3 x 1.3 mm.
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., 2002, 2003).
Flower buds were collected from each plant 1 d before anthesis and dissected into the following parts: sepals and petals (the perianth), anthers and filaments (the androecium), and styles and ovary (the gynoecium).
Androecium and gynoecium maturation occurred simultaneously since the flower opening and the longevity observed was one day.
Androecium of 4 exserted stamens, filaments 5-5.5 cm long, apically glabrous, basally pilose, connate at base for 0.4 cm forming a staminal blade; anthers dorsally subquadrate, 2 x 2.5 mm.
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.