dorsifixed


Also found in: Medical.

dorsifixed

(ˈdɔːsɪˌfɪkst)
adj
(of an anther) attached dorsally to the filament
References in periodicals archive ?
Anthers are 2.5-3.0 mm long and 1.0-1.5 mm wide, dorsifixed, reddish pink in colour, bilobed and tetralocular with dehiscence-slit facing the interior of the flower (introrse).
'Filaments without depressions accommodating anthers, which are dorsifixed 3 3.
There are six free stamen, with wider filaments at the base; the anthers have asymmetric tips and are dorsifixed, with longitudinal dehiscence, and introrse (Figure 11-m).
Similarities between flowers of Adenanthemum Conwentz and Itea include that the flowers are hermaphroditic, pedicellate, have a pentamerous and actinomorphic perianth with distinct whorls of sepals and petals, a valvate corolla, a haplostemonous androecium with antesepalous stamens, dorsifixed anthers with introrse dehiscence, a superior ovary (ovary position is variable in Itea), two fused styles, and a single, capitate stigma (Conwentz, 1886; Kubitzki, 2007a).
They are ten arranged in two whorls, each with 2 mm long white filament and 1 mm long dorsifixed yellow dithecous anther (Fig.
Staminate inflorescences capitate, 10-12 flowered in a single raceme, peduncle to 10 mm long, pedicels up to 1 mm long; perianth campanulate, 6 mm long, 6-lobed, each lobe 1 mm long; stamens 6 alternate with perianth lobes, anthers bilocular, dorsifixed, elliptic < 1 mm diameter, extrorse, generally 1 or 2 reduced to staminodes; the fine filaments connate basally, borne at the base of a pistillode 3 mm long; lower part of the perianth reduced to 2 or 3 small involucral bracts; indumentum densely short velutinous.
40 mm long, slightly complanate, white, the antepetalous ones adnate to the petals for 18-20 mm, the antesepalous ones adnate to the petals for 10-11 mm; anthers linear, 9-11 mm long, dorsifixed ca.
Staminate flowers symmetrical, trimerous, not widely open at anthesis, sepals 3 short, imbricate, free, petals 3, valvate, stamens 6, slightly exceeding petals at anthesis, anthers small, dorsifixed, oval-linear with sagittate base, pistillode reduced.
Stamens 5; filaments slender, adnate at middle of the corolla tube, slightly winged at base; anthers dorsifixed, bilobed, [+ or -] sagittate, creamy-white.
Stamens number eight to twelve, are opposite the sepals and petals, and have introrse, dorsifixed anthers that dehisce by longitudinal slits.