extrorse

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extrorse

(of anthers) opening towards the outside of the flower.

Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

References in periodicals archive ?

When the Pennipollis plant and Appomattoxia were both linked with Ceratophyllum, the three taxa were united by introrse or extrorse (rather than latrorse) anthers and intermediate infratectal structure (counted as a step toward granular structure in Pennipollis because this character was ordered).

Phylogenetic Analyses of Cretaceous Fossils Related to Chloranthaceae and their Evolutionary Implications

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.

Pisonia calafia (Nyctaginaceae) species nova from the Baja California Peninsula, Mexico