caudicle


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caudicle

[′kȯd·ə·kəl]
(botany)
A slender appendage attaching pollen masses to the stigma in orchids.
References in periodicals archive ?
In Tylophora the pollinia are mostly shortly ellipsoidal to nearly spherical, the caudicles are very thin and often short, and the corpuscle is mostly very small and frail.
The Stapelieae were defined by pollinia attached to the caudicles at their bases, anther sacs not embedded in the tissue of the anther wings, anther wings always below the level of the anther sacs, and style head separated from the ovaries by a sharp constriction, with the gynoecium devoid of a "true style.
Style head very variably shaped, with thick cylindrical part just above ovaries widening slightly toward apex, narrowing above this into usually bifid apex, which is sometimes much inflated, occasionally long and slender, with 5 stigmatic zones located on sides of lower cylindrical part, p robably just below thickest area behind guide rails, secreting translator just above each guide rail; translator consisting of small, porous, cliplike, brownish corpuscle with flanks and sometimes with floor, sometimes with one or two caudicles (if two then each attaching a pair of pollinia to corpuscle) (Genianthus, Secamonopsis, and some species of Secamone); ovary apocarpous, semi-inferior.
Style head broad, often with flat or concave apex (rarely conical to slenderly conical), sessile on top of ovaries to tapering gradually with narrow neck into them, with 5 stigmatic zones located on sides of lower cylindrical part behind guide rails, secreting translator just above each guide rail; translator consisting of hard, cliplike, brown to black corpuscle, mostly with flanks and floor, with two flexible, translucent caudicles (rarely absent in some Marsdenieae), each of which attaches one pollinium to corpuscle; ovary apocarpous, mostl y superior.
Style head broad, with thick convex to conical apex, sessile on top of ovaries; corpuscle usual ly with flanks and floor (occasionally very fragile and lacking floor: Cibirhiza, Fockea, Gongronerna); caudicles normally present (more or less absent in Cibirhiza, Fockea).