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extrorse dehiscence (black) of anthers


adj. Botany
Facing outward; turned away from the axis: extrorse anthers.

[Late Latin extrōrsus, turned outward (modeled on Latin intrōrsum, turned inward) : Latin extrā, outside; see extra- + Latin versus, past participle of vertere, to turn; see wer- in Indo-European roots.]


(ɛkˈstrɔːs) or


(Biology) botany turned or opening outwards or away from the axis: extrorse anthers.
[C19: from Late Latin extrorsus in an outward direction, from Latin extra- + versus turned towards]


(ɛkˈstrɔrs, ˈɛk strɔrs)

adj. Bot.
turned or facing outward, as anthers that open toward the perianth.
[1855–60; < Late Latin extrorsus outward = Latin extr(a)- extra- + (v)orsus turned]
ex•trorse′ly, adv.
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References in periodicals archive ?
The position with Ceratophyllum is supported by a shift from latrorse to introrse or extrorse anthers (in both taxa, the thecae are shifted toward one surface, but whether this is abaxial or adaxial is unknown).
australis, from which it differs by the small stature (5 m tall, exceptionally more), laciniate stipules, membranaceous leaf blade with 8-11 lateral veins per side and margin not revolute, 2-forked dichasia (each 1 x 1 cm) axillary to the distal most leaves, tetramerous and pentamerous flowers, dark red, erose, reddish sepal margins, latrorse anthers, and slightly veined samaras 18-20 x 5-7 mm, with two locules, one of which is sterile (versus large trees to 40 m tall, entire stipules, subchartaceous leaf blade with 4-6 lateral veins per side and margin revolute, 4 to 6-forked dichasia (each 3.5 x 2.5 cm) located on defoliate branches, exclusively pentamerous flowers, entire, light green sepal margins, extrorse anthers, and one-celled, markedly veined samaras 20-28 x 7.5-17 mm in Z.
3.5 mm long, anthers extrorse, white, 3-3.4 mm long with a brownish apical cochleariform linear-oblong appendage ca.