Medical

hymenium

Also found in: Dictionary, Encyclopedia, Wikipedia.

hymenium

(hī-mē′nē-əm)
n. pl. hyme·nia (-nē-ə) or hyme·niums
The spore-bearing layer of the fruiting body of certain fungi, containing asci or basidia.

hy·me′ni·al (-əl) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

hymenium

a layer of spore-producing structures present in the fruiting body of fungi of the BASIDIOMYCOTA and ASCOMYCOTA.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
Mentioned in
References in periodicals archive
Hymenium: Gills, slightly decurrent, well separated, varying from narrow to broad, white initially, becoming pinkish-brown with age.
Hymenium: Gills, attached or free, distant, broad, white to pale yellow.
Hymenium: Gills, adnate, close to subdistant, moderately broad, white becoming pale pink to brown with age.
Hymenium: Gills, attached to sinuate, crowded, broad, orange; gill edges bright orange-red.
Hymenium: Gills, crowded, narrow, pinkish-buff to tan.
Hymenium: Gills, attached, close, broad, veined, pink.
Basidiomata up to 6 X 3 cm, branched, gregarious; stipe up to 3 X 1.2 cm, irregular in cross-section, usually matted with hyphal layer identical to subiculum; branches in 1-5 ranks, irregularly dichotomous, ascending, flexuous, often covered with subicular-like layer downward, gray-drab, tandrab to pinkish tan ("avellaneous" "light pinkish cinnamon," "fawn color;" 7A2, 7B3, 7C5); hymenium amphigenous above, often clearly unilateral below; internodes diminishing irregularly upward; axils narrowly rounded.
Hymenium thickened significantly; basidia 40-50 X 7-9 [micro]m, clavate, clamped; contents homogeneous at all ages; sterigmata 4, up to 7 [micro]m long, slender, slightly incurved.
As noted by Corner (1950, 1970), basidiospores are strangely rare in the hymenium of herbarium specimens, although adequate spores are shed to give a spore print within a few hours.
Hymenium often unilateral, with off-white sterile surface decurrent from axils; axils lunate below, narrowly rounded above; branches in up to six ranks, terete to flattened below, terete above, sympodial to dichotomous throughout.
Hymenium thickened significantly; basidia 48-55 X 7-8.5 [micro]m, clavate to narrowly sphaeropedunculate, clamped; contents multiguttulate to multigranular at maturity, the guttules/granules yellow-refringent; sterigmata 4, up to 8 [micro]m long, slender, straight, spindly; filiform hyphal tips occasionally exerted from hymenium (TENN 43721; Desjardin 4773).
Copyright © 2003-2025 Farlex, Inc Disclaimer
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.