Details about map content are available here Click on the map dots to view record details.
Species Information
Summary: Features include 1) resupinate growth on hardwood, 2) soft wax-like membranous patches attached tightly to wood, colored whitish with a rose tint, the surface smooth to powdery or mealy, and the margin fibrillose when young but often not differentiated when mature, 3) spores that are round, irregularly uneven, inamyloid, cyanophilic, and thick-walled, with many chlamydospores usually also present, 4) long tubular basidia with a tapering base and comparatively short sterigmata, 5) cystidia lacking, and 6) a monomitic hyphal system, the hyphae with clamp connections.
Granulobasidium vellereum has been found in BC, WA, ID, AB, MB, NB, NS, ON, PQ, AL, CA, GA, IL, KS, MA, MI, MO, MN, MT, NH, NY, OH, PA, SD, TX, VT, and WI, (Ginns). The distribution also includes Europe including Denmark and Sweden, (Eriksson), and Switzerland (Breitenbach).
Fruiting body: resupinate, forming thin, membranous patches 0.01-0.02cm thick and several centimeters to decimeters across, attached tightly to substrate, consistency soft, wax-like; "white to ocherish when young, later with slight pink tint", smooth, finely farinose [mealy], dull; "margin diffuse to somewhat fringed", (Breitenbach), resupinate, about 0.01-0.02cm thick, membranaceous, adnate [tightly attached to substrate], spore-bearing area continuous; "whitish with a rose tint to rose red, in the herbarium fading to yellowish or pale ochraceous"; smooth or somewhat pulverulent [powdery]; sterile margin fibrillose when young, but mature specimens often fertile throughout, (Eriksson), spore deposit white (Buczacki)
Microscopic: SPORES 6-8.5 x 5.5-7.5 microns, nearly round, "with fine roughening on surface", inamyloid, colorless, cyanophilic, thick-walled, containing droplets; BASIDIA 4-spored, 45-65 x 4.5-5.5 microns, "cylindric-clavate, somewhat sinuous", with basal clamp connection; CONIDIA (chlamydospores) 9-10 x 5.5-6 microns, elliptic, smooth, cyanophilic, thick-walled, with droplets, some germinating; CYSTIDIA not seen; HYPHAE monomitic, 2-5 microns wide, thin-walled, with clamp connections, (Breitenbach), SPORES round, irregularly uneven (may look echinulate), inamyloid, cyanophilic, thick-walled, usually containing one droplet, mostly 7-8 microns in diameter; BASIDIA 4-spored, 40-60 x 5-6 microns, "tubular, somewhat sinuous, tapering towards the base", with basal clamp connection, sterigmata small; CONIDIA (chlamydospores) "usually present, often in large quantities", 8-10 x 6-8 microns, "formed apically or intercalary" on thin-walled hyphae, about 2 microns wide, apical conidia rounded or pear-shaped, "intercalary ones more or less fusiform", conidial wall much thickened, strongly cyanophilic and also dextrinoid, protoplasm mostly with one oil droplet; CYSTIDIA none; HYPHAE monomitic, 3-5 microns wide, "with thin or somewhat thickened walls", with clamp connections; "subiculum of densely interwoven hyphae with predominantly vertical hyphal direction", (Eriksson)
Habitat / Range
on dead wood of hardwoods, especially Ulmus (elm); winter half of the year, (Breitenbach), on hardwood (e.g. Ulmus), usually near ground, but when weather is mild and humid may be found on trunks several meters above the ground, (Eriksson), Acer rubrum (Red Maple), Acer saccharum (Sugar Maple), Betula alleghaniensis (Yellow Birch), Celtis occidentalis (Hackberry), Fagus grandifolia (American Beech), Malus sp. (apple / crabapple), Populus balsamifera (Balsam Poplar), Populus tremuloides (Quaking Aspen), Populus trichocarpa (Black Cottonwood), Thuja plicata (Western Red-cedar), Ulmus pumila (Siberian Elm), (Ginns), on rotting bark and sometimes wood of hardwood trees; usually winter, (Buczacki)
Similar Species
Other Hypochnicium species do not have the combination of reddish fruitbody, round, not quite smooth spores, usually many chlamydospores, long tubular basidia with a tapering base, and a lack of cystidia, (Eriksson).
