Good day to everyone,

there is some uncertainty with identification of this species.

Large spores of this specimen coincide only with one species in Stomiopeltis (S. betula) though the host differs (Luttrell, 1946; Ellis, 1977). There is a species described from Ledum (S. ledi), but it has much smaller spores (Remler, 1979). It could be possible to consider S. versicolor as well, which also was collected on Rhodod. hirsutum. But it was later transferred to Microthyrium and in "British fungi keys" mentioned with spore appendages. Therefore i inclined to S. betula. Probably you will have other suggestions?

Nina.

Thyriothecia scattered on upper leaf side (fallen leaves of Andromeda polifolia), dark brown, 150-200 mk in diameter, with visible pore.

Scutellum from irregular lobed cells, in some ascocarps (probably later in development) cells to the edge become more elongate and radially arranged; asci 37–44 x 8–10 mk; pseudoparaphyses filiform, about 1.5 mk broad; spores fusoid, with many oils, slightly heteropolar, with one weak septa, some curved, 15 (13–18) x 3.2 (2.5–3.9) mk (n=23, measurements in dead state).