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Summary: features include 1) growth on twigs and stems of species of Rosaceae, 2) fruitbodies as patches that are palish with orange tinges, thin and leathery, and often pruinose, 3) spores oval to oval-elliptic, amyloid, and finely spiny, 4) catahymenium composed of a) a loose network of basidial elements, b) naked dendrohyphidia (may be covered with crystals), and c) abundant yellowish pseudocystidia (macrocystidia) of a deep origin, and 5) monomitic context without clamp connections; recorded from BC, also ON, CA, (Ginns), Europe including Denmark, Norway, Sweden, (Eriksson), collections examined from BC, CA, France, Germany, Norway, Sweden, and range includes South America, Japan, New Zealand, (Lemke)
Fruiting body: 0.01-0.03cm thick, effused (spread out on substrate), closely attached, consistency subcoriaceous (somewhat leathery); "palish with orange tinges"; usually smooth; without distinct margin, (Eriksson), corticioid, in resupinate patches 0.5-1.5cm wide, 0.01
Microscopic: SPORE about 20 x 13 microns, elliptic to nearly round, finely echinulate (spiny), amyloid; BASIDIA 4-spored, about 60 x 15 microns, sterigmata about 15 microns long; DENDROHYPHIDIA numerous, richly branched and covered with crystals; PSEUDOCYSTIDIA "variable in shape, narrowly paraphysoid with rounded apex, or wider and more rounded, tapering basally to a long shaft with a +/- moniliform apex, or even smooth to simply tapering", cell contents yellowish (darken in sulfovanillin), making pseudocystidia easy to separate from basidia; HYPHAE monomitic with hyphae 2.5-4 microns wide, simple-septate, thin-walled, in an open texture, (Eriksson), SPORE (14)16-20(22) x (10)12-15(16) microns, oval to oval-elliptic, "apiculate, flattened adaxially, firm-walled, finely echinulate in Melzer's, amyloid"; catahymenium composed of a loose network of basidial elements, naked dendrohyphidia, and abundant pseudocystidia (macrocystidia) of a deep origin; BASIDIA 4-spored, (30)50-70(80) x 10-14 microns, cylindric to flexuous-subclavate, sterigmata divergent and up to 20 microns long and 4 microns wide at base; PSEUDOCYSTIDIA embedded, (30)40-60 x 12-20 microns, variable, mostly ampulliform with one to several apical constrictions, contents yellow brown in KOH, PARAPHYSOIDS 2-2.5 microns wide, hypha-like, "without clamps, simple to branched, forming a mass of naked dendrohyphidia at the level of the hymenium"; HYPHAE monomitic, of hyphae 2.5-4 microns wide, simple-septate, thin-walled, branched, (Lemke)
Habitat / Range
on dead twigs and stems, in Europe primarily on Rosaceae, in BC a collection from Vaccinium, in California from Arctostaphylos columbiana (hairy manzanita), Rhododendron occidentalis (western azalea), Ribes sanguineum (redflower currant), Rubus ursinus (Pacific blackberry), Umbellularia californica (California laurel), Lithocarpus densiflora (Tanoak), (Lemke), also recorded from Tsuga (hemlock), (Ginns), usually on Rosaceae, but recorded from Taxus (yew), (Eriksson for North Europe), fall, winter, spring, (Buczacki)
among amyloid-spored Aleurodiscus species, distinct in having naked, profusely branched dendrohyphidia, (Lemke); Peniophora erikssonii somewhat similar in appearance, but very different microscopically, (Eriksson)
Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2020. E-Flora BC:
Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for
Advanced Spatial Analysis, Department of Geography, University of British
Columbia, Vancouver. [Accessed:
2020-06-07 3:32:24 AM
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