anatropous


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Related to anatropous: anatropous ovule

anatropous

[ə′na·trə·pəs]
(botany)
Having the ovule fully inverted so that the micropyle adjoins the funiculus.
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References in periodicals archive ?
116 Ovule curvature (0) anatropous (or nearly so), (1) orthotropous (including hemitropous).
mollissima was the same as those reported for other species of in terms of the anatropous bitegmic and crassinucellate ovules and the Polygonum type embryo sac (Xu et al.
The seeds are ovoid-lanceolate, 1.75 mm, anatropous, with a tuberculed, hexagonal-celled exotesta.
The asymmetrical integument growth creates the anatropous curvature.
This analogy is not so fanciful as it seems, if the suggestion of Endress (2011) that anatropous ovules are ancestral in angiosperms.
In contrast, Abolbodoideae (Abolboda, Aratitiyopea, and Orectanthe) have bifacial leaves, spherical pollen without an evident aperture, novel glands on the gynoecium, anatropous ovules, and spherical seeds (Dahlgren et al., 1985; Kral, 1998; Campbell, 2004b; Campbell & Stevenson, 2007).
The ovary contains a single, basal, anatropous ovule (Goetghebeur, 1998).
Ovule: (0) orthotropous, bitegmic; (1) anatropous or hemianatropous, bitegmic; (2) anatropous, unitegmic (Davis, 1966; Palkovic, 1974; Orchard, 1975; Corner, 1976; Cronquist, 1981; Dahlgren & Thorne, 1984; Webb & Gornall, 1989; Kubitzki, 1993b).
Ovary (2-)4-5(-14) carpellate, superior to inferior, with usually axile to intruded parietal placentation, rarely apical or basal; ovules 1 to many per carpel, anatropous to nearly campylotropous, unitegmic, tenuinucellate, the embryo sac usually of the Polygonum type; style short to long, hollow, sometimes expanded apically; stigma truncate to capitate or slightly to strongly lobed, sometimes cup shaped, funnel shaped, or flabellate to pinnatifid.