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Collected with Jacob Kalichman. Growing on elevated portions of a large decorticated hardwood log near Fagus grandifolia, Quercus spp., Ostrya virginiana, Ilex opaca, Asimina triloba, Magnolia acuminata, Aesculus sp. and Acer sp. Basidiocarps tightly packed. Each individual basidiocarp attached to a sparse white, arachnoid subiculum. Basidiocarps pendent, cylindrical and finely hairy; mouths white and bases very light brown; 0.1 to 1.1 mm long and 0.2 to 0.3 mm wide. All structures inamyloid. Clamps present. Hairs smooth, hyaline, thick-walled and unbranched. Cystidia absent. Basidia 4-sterigmate. Spores hyaline, smooth and thin-walled. Spore measurements: (3.6) 4.2 – 5.2 × (2.6) 2.9 – 3.2 (3.3) µm, Q = (1.3) 1.4 – 1.6; N = 6;Me = 4.6 × 3.1 µm; Qe = 1.5.

Species Lists


DSC_9347 crop.jpg
2021-10-01-00.04.21 ZS DMap crop.jpg
2021-10-01-00.22.11 ZS PMax crop.jpg
DSC_9761 Hairs at 400x in Melzer's.JPG
DSC_9781 Basidium at 400x in Melzer's.JPG
DSC_9784 Spore and hair fragments at 400x in Melzer's.JPG

Proposed Names

57% (1)
Used references: Agerer, R., Merkmalsvergleich, B., & Fragen, C. N. (1973). Rectipilus. Eine neue Gattung cyphelloider Pilze. Persoonia, 7(3), 389-436.
Gorjón, S. P., & de Jesus, M. A. (2014). Rectipilus stromatoides sp. nov.(Agaricales, Basidiomycota), a new cyphelloid fungus from the Brazilian Amazon.
Based on microscopic features

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