orthotropous


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orthotropous

(of the angiosperm ovule) having the MICROPYLE directed away from the placenta and erect on the FUNICLE.
References in periodicals archive ?
Unusual orthotropous germination in seeds of Cycas rumhii Miq.
Origin of the coleorhiza in cycad seedlings and its structural homology with that of the Poaceae
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).
Systematics and leaf architecture of the Gunneraceae
The seed is orthotropous because the hilum, the chalaza, and the
Seed coat anatomy of Ceratozamia mexicana (Cycadales)
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