apocarpous


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apocarpous

(of an ovary of a flowering plant) having the CARPELS free from each other. Compare SYNCARPOUS.
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0) partially apocarpous, (1) syncarpous (see Gonzalez & Stevenson, 2000b).
Convergent elaboration of apocarpous gynoecia in higher advanced dicotyledons (Sapindales, Malvales, Gentianales).
Although the "Ambelanieae" and "Macoubeeae" have a syncarpous ovary and seeds embedded in pulp, whereas in the Tabernaemontaneae the ovary is usually apocarpous and the seeds displayed with (often brightly colored) arils, the close relationship of these three tribes is well supported by morphological, chemical, and molecular evidence (Fallen, 1986; Zhu et al.
Ovary mostly apocarpous, superior to subinferior; placentation marginal when ovary apocarpous, parietal or axile when syncarpous, upper part of carpels fusing postgenitally to form complex style head that produces adhesive for pollen transport, with pollen-trapping basal collar and/or pollen-presenting upper crest present in many Rauvolfioideae and Apocynoideae; stigma mostly on underside of style head, often restricted to five chambers behind guide rails, but laterally uniformly receptive in some Rauvolfioideae.
Anthers adnate to style head; corolla-lobe aestivation in bud typically dextrorse (overlapping to the right) or valvate, rarely sinistrorse; fruit dehiscent, almost always apocarpous, a pair of follicles, sometimes reduced to one by abortion or postgenitally fused; seeds small, compressed, almost always with coma (tuft of hairs) at one end 2 1.
The Escalloniaceae, a present-day taxon of this complex, is of interest, in particular the genus Tetracarpaea, which has an apocarpous gynoecium and tetramerous flowers, this first character being associated with the Apocynaceae and the latter with the Scrophulariales via the Buddlejaceae.
Gynoecium 2(-9) carpellate, but usually bicarpellate or occasionally 5-8-merous, rarely pseudomonomerous; syncarpous or apocarpous, (1-)2(-9) 1ocular; usually axile or parietal placentation, rarely free central, basal or apical; superior, semi-superior or inferior.