Favoritos de pipsissewa

Growing on hardwood twigs and leaf litter on the bank of a road near Rhododendron sp., Quercus spp., Betula sp., Liriodendron tulipifera, Acer sp. and likely other hardwoods. Cap dry and smooth; finely translucent-striate at margin; 1.9 to 4.1 mm wide and 1.3 to 2.3 mm tall. Gills very finely adnexed – almost free; with 1 tier of lamellulae. Stems smooth except for very finely pruinose at the apex; dry; 11.5 to 18.8 mm long and 0.3 to 0.4 mm wide. Basal mycelium white and sparse. Odor not distinctive. All lamellar and pileipellis structures inamyloid. Pileipellis a hymeniderm. Yellowish resinous substance present on gill margins in Melzer’s reagent. Pleurocystidia absent or scarce. Hyaline cheilocystidia smooth and thin-walled, mostly covered in the the resinous substance. Basidia 4-sterigmate. Spores hyaline, smooth and thin-walled. Spore measurements: (7.3) 8 – 10 (11.6) × (3.1) 3.3 – 4.3 (4.4) µm; Q = (1.9) 2.1 – 2.8 (3); N = 25; Me = 9.1 × 3.7 µm; Qe = 2.5.

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Additional notes for sequences (bases on the right):

ITS:
LSU:
rpb2: b6F-b7.1R primer extension
SSU:

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Originally posted to Mushroom Observer on Oct. 22, 2021.

Pseudoboletus parasiticus parasitizing Scleroderma citrinum. Photographed last night at Mycofest in Pennsylvania with a Convoy C8 365 nm UV flashlight and Acebeam PT40 white LED flashlight. I noticed this bolete was fluorescent by running the UV light over the specimen table at night.

This is an example of Ganoderma tsugae growing on an atypical host, Acer rubrum (red maple). While it's true that G. tsugae is nearly always found on hemlock, I have found two red maple hosts and one red oak. The only other red laccate Ganoderma species that may occur in Vermont, though I have never found it, is G. sessile (I believe Vermont is north of the range of G. curtisii). G. sessile differs from G. tsugae somewhat in form and color. Unlike G. tsugae, it tends to be sessile (lacking a stipe), or to grow in rosettes when emerging from buried wood. From photos I've seen, it seems like the colors tend to be a little darker and less vibrant than G. tsugae, but this is probably variable. Most conclusive is the context (flesh) when viewed in cross-section--G. tsugae has paler context than G. sessile and lacks its concentric growth zones. See Figure 9 here: https://www.messiah.edu/Oakes/fungi_on_wood/poroid%20fungi/species%20pages/Ganoderma%20sessile.htm

This is an example of Ganoderma tsugae growing on an atypical host, Acer rubrum (red maple). While it's true that G. tsugae is nearly always found on hemlock, I have found two red maple hosts and one red oak. The only other red laccate Ganoderma species that may occur in Vermont, though I have never found it, is G. sessile (I believe Vermont is north of the range of G. curtisii). G. sessile differs from G. tsugae somewhat in form and color. Unlike G. tsugae, it tends to be sessile (lacking a stipe), or to grow in rosettes when emerging from buried wood. From photos I've seen, it seems like the colors tend to be a little darker and less vibrant than G. tsugae, but this is probably variable. Most conclusive is the context (flesh) when viewed in cross-section--G. tsugae has paler context than G. sessile and lacks its concentric growth zones. See Figure 9 here: https://www.messiah.edu/Oakes/fungi_on_wood/poroid%20fungi/species%20pages/Ganoderma%20sessile.htm

Beautiful dark orange cap with dark gills. Dark purplish spore print. Ring present. No veil remnants on the cap edges that I noticed. Scaly stem with brownish orange shades. Topside of the ring had the purplish colors of the spores. Primarily hardwoods nearby with one hemlock.