tetradynamous


Also found in: Medical.
Related to tetradynamous: placentation, didynamous, syngenesious, syncarpous

tet·ra·dy·na·mous

 (tĕt′rə-dī′nə-məs)
adj.
Having six stamens, four of which are longer than the others, as in most plants of the mustard family.

[tetra- + Greek dunamis, strength; see dynamic + -ous.]

tetradynamous

(ˌtɛtrəˈdaɪnəməs; -ˈdɪn-)
adj
(Botany) (of plants) having six stamens, two of which are shorter than the others
[C19: from tetra- + Greek dunamis power]

tet•ra•dy•na•mous

(ˌtɛ trəˈdaɪ nə məs)

adj.
having four long and two short stamens, as a flower of the mustard family.
[1820–30; tetra- + Greek -dynamos -powered, adj. derivative of dýnamis power; see -ous]
References in periodicals archive ?
Sepals oblong, ascending to spreading, equal, pubescent with dendritic or forked trichomes; petals white, obovate to spatulate or oblong; claw distinct, basally pubescent or minutely papillate; stamens 6, slightly tetradynamous; filaments wingless, unappendaged, basally pubescent or minutely papillate, free; anthers oblong; nectar glands confluent, subtending bases of all filaments; ovules 30-54 per ovary.
Sepals ovate to oblong, deciduous, glabrous, erect to spreading, equal, base of inner pair not saccate; petals white, rarely lavender or yellowish, ascending or spreading, obovate, spatulate, or oblanceolate, apex obtuse; claw distinct, glabrous; stamens 6, slightly tetradynamous; filaments unappendaged, glabrous or rarely pubescent, free; anthers oblong; nectar glands confluent, subtending bases of all stamens; ovules 30-80(-140) per ovary.
Sepals oblong, free, deciduous, erect to ascending, subequal, margin not membranous; petals yellow drying reddish, rarely white or pink, oblanceolate-linear, apex obtuse; claw slightly narrower than blade, glabrous; stamens 6, erect, slightly tetradynamous; filaments glabrous, free, dilated at base; anthers linear or linear-oblong, apiculate or not at apex; nectar glands confluent, subtending bases of all stamens; ovules 20-70 per ovary.