Inocybe umbrosaBiostatusPresent in region - Indigenous. Endemic
Images (click to enlarge) Caption: 68/175: Inocybe umbrosa Owner: Egon Horak | Caption: Inocybe umbrosa (type): p, carpophores; r, spores; s, basidia; t, cheilo-cystidia; u, pleurocystidia;
v caulocystidia. | Caption: Dried type specimen Owner: Herb PDD |
Article: Horak, E. (1978) [1977]. Fungi Agaricini Novaezelandiae. VI. Inocybe (Fr.) Fr. and Astrosporina Schroeter. New Zealand Journal of Botany 15(4): 713–747 (http://www.rsnz.org/publish/abstracts.php). Description: Pileus 8-25 mm diam., hemispherical when
young, becoming convex or conico-convex to campanulate; brown, fuscous, umber-brown;
in young carpophores margin densely covered with silvery, sub persistent conspicuous,
fibrillose remnants of the veil; squamulose to scaly at disc, rimose or fibrillose
towards margin, dry, estriate. Lamellae adnexed, ventricose, crowded (L -20,
1 -3), argillaceous when young soon turning deep brown or umber-brown, edge
albofimbriate. Stipe 20-50 x 1-2 mm, cylindrical, equal; concolorous with pileus,
often with red-brown or chestnut-brown tinge; pruinose all over, at base with
white fibrillose or woolly, appressed veil remnants, which disappear with age;
dry, slender, hollow, single and cespitose. Context dark brown. Odour and taste
not distinctive. Chemical reactions on pileus: KOH-negative.
Spores 6.5-8.5(9) x 4-5 µm, amygdaliform
brown, smooth. Basidia 20-26 x 5-7 µm 4-spored. Cheilo- and pleurocystidia 40-60
x 12-18 µm, fusoid to lageniform, metuloid (-3 µm diam.), hyaline to yellowish,
encrusted with crystals. Caulocystidia -130 x -20 µm, elongate-fusoid, metuloid,
crystals present. Cuticle a trichoderm of cylindrical hyphae (5-10 nm diam.),
encrusted with brown (KOH) pigment; hyphae of veil 2-4 µm diam.; clamp connections
on septae. Habitat: On soil among moss and litter under
Nothofagus (N. cliffortioides, N. menziesii) and Leptospermum
(L. scoparium, L. ericoides), rarely also on rotten wood of Nothofagus.
New Zealand. Notes: Inocybe umbrosa is distinguished by dark brown to fuscous colours of the carpophores. The slender
stipe is pruinose all over and the rather small (-50 x -15 µm) fusoid cheilocystidia
are intermixed with clavate thin-walled cystidia without crystals.
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