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 Add this item to the list   SISTOTREMA CONFLUENS Pers. ex Fr.
Page number:42 
Remarks (public):The collection cited above is in bad shape, hence the poor description. DONK (1956b:4) explained that the generic name Sistotrema Pers. ex Pers. is different from Sistotrema Fr., as the two genera are typified by different species which besides are not related taxonomically. He consequently regarded Sistotrema confluens (Pers.) ex Fr. as an epithet transferred by Fries to his own Sistotrema and validated in the process. I understand his reasoning but do not share his opinion that the use of brackets is necessary. The specific epithet of Sistotrema confluens Pers. (1794) remained ineligible for considerations of priority until it was validated by FRIES (1821). By this operation the species at once became a member of the Friesian genus Sistotrema. Although technically a recombination, I feel that Fries' manipulation should not be rated as such; a recombination, in my opinion, suggests an act in which two equivalent elements - that is, two validly published names - are involved.
Description type:Non-original description 
Description:SISTOTREMA CONFLUENS Pers. ex Fr.
Basidiomes simple or confluent, pileate, not always clearly stipitate. Pileus up to 10 mm wide, flabelliform, wrinkled, glabrous, somewhat shiny, yellow-brown to fulvous, margin more or less involute. Stipe 0-12 x 0-3 mm, lateral, sometimes hardly differentiated from the pileus, more or less flattened, glabrous, concolorous with the pileus, springing from a mycelial pad. Spines up to 1.5 mm long, decurrent, subdistant, subulate or flattened to lamellate, concolorous with the pileus. Context about 1 mm thick, homogeneous, not zoned, soft, fragile, whitish. Smell imparticular when fresh.
Context of the pileus monomitic, consisting of generative hyphae. Generative hyphae 3.5-7 µm wide, somewhat inflating, sometimes inflated at the septa, thin-walled, branched, septate, with clamp-connections. Context of the spines similar. Basidia immature or collapsed, 4.5-7 µm wide, with a basal clamp. Spores 3.6-4 x 2.2-2.7 µm, ellipsoid, adaxially flattened, smooth, colourless, with an oil-drop, with oblique apiculus. Cystidia absent.
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