Name: Armillaria sparrei
Author: (Singer) Herink
Citation: Sympozium o Václavce Obecné Armillaria mellea (Vahl ex Fr.) Kumm. (Brno): 43 (1973)
Both Singer (1956) and Valenzuela (1993) described the pileus surface as of variable color, including olive in some cases, but we could not confirm the latter characteristic. A. sparrei was the most widely distributed Armillaria species in Patagonia. Although the type specimen has seemingly been lost, the species concept applied here is consistent with other authenticated material collected by Singer.
Basidiocarps mild when fresh, becoming sharp and acidic with time, of variable size from medium to large, 35-100 mm diam, rarely smaller. Pileus surface beige to light brown (10YR8/3-4) at the center to reddish-light brown at the margin (5YR5/4-7.5YR6/3), viscid, with few to many squamules at the center, but never abundant, that disappear with age. Stipe long and stylized, distinctly bulbose at the base; annulus poorly developed, membranaceous, becoming turned up or vestigial after drying, not developing squamules in its lower face (fig. 2G, H). Basidia 38-43(-55) x 8-9(-10) µm; cheilocystidia clavate; basidiospores (7-)8.5-11(-12) x (4-)5-6.5(-7) µm, with a Q ? 2. The trama is hyphal, divergent to subdivergent.
Created: 2007-06-19 16:25:00 ACST (+0930) by Nathan Wilson (nathan)
Last modified: 2018-11-16 00:14:55 ACDT (+1030) by walt sturgeon (Mycowalt)
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