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 Entoloma atrellum
BiostatusPresent in region - Indigenous. Endemic
Images (click to enlarge)
Caption: Entoloma atrellum Hk. (holotype)
a. carpophores. b. spores. c. cheilocystidia. d. cuticle. | 
Caption: gill edge and spores in melzer's. Note partially gelatinized darker edge.
Owner: J.A. Cooper | 
Owner: J.A. Cooper | 
Caption: Dried type specimen
Owner: Herb PDD | |
Article: Horak, E. (1973). Fungi Agaricini Novazelandiae I-V. Beihefte zur Nova Hedwigia 43: 200 p.
Description: Pileus
15-25 mm diam., umbilicate with incurved, not striate margin, dark brown or
black and densely covered by small, blue squamules, especially at the centre,
dry, not hygrophanous. Lamellae (L 1-18, 1 3) emarginate and with short tooth
attached to the stipe, whitish-bluish when young, turning bluish-pink, with
fimbriate blue gill edge. Stipe 20-30 x 1.5-3 mm, cylindrical, dark blue, with
white mycelium at the base, densely covered with concolorous or fuligenous appressed
fibrils, dry, single. Context blue. Odor and taste not distinctive.
Spores 9.5-11 x 6.5-7.5 µm. 5-6-sided.
Basidia 25-32 x 10 µm, 4-spored. Cheilocystidia 35-70 x 12-20 µm, fusoid or
ampulliform, with long and apically rounded neck, conspicuous blue, plasmatic
or vacuolar pigment present, membrane thin-walled. Pleuro- and caulocystidia
none. Cuticle a cutis or trichoderm of suberect, fasciculate, cylindrical hyphae
(6-10 µm diam.), membrane thin-walled, not gelatinized, with brown (in KOH)
plasmatic or vacuolar pigment. Clamp connections absent.
Habitat: Between
mosses on bark of living Dacrydium cupressinum Podocarpaceae). New Zealand.
Notes: This
species resembles E. melanocephalum Stev. but the carpophores do not
have green colours. Microscopically the two taxa are also separated by their
differently shaped cheilocystidia and by the structure of the cuticle.
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