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#fungi

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Warty Cavalier (Melanoleuca verrucipes): Usually found in the late summer and autumn, this mushroom was first recorded in the UK only in 2000*, and is mostly found in the south of England. Well, this one appeared in my garden in the Central Belt of Scotland last Friday (11 April)! It popped out in an old abandoned flower pot. ... #Mushrooms, #Fungi, #Nature, #Microscopy: aye.tf/2025/04/14/melanoleuca-

aye, tf · Warty Cavalier (Melanoleuca verrucipes)Usually found in the late summer and autumn, this mushroom was first recorded in the UK only in 2000*, and is mostly found in the south of England. Well, this one appeared in my garden in the Central Belt of Scotland last Friday (11 April)! It popped out in an old abandoned flower pot.
Continued thread

Yesterday, I helped co-lead my first mushroom walk hosted by the Discovery Center in Philadelphia. It was cold and rainy, but we still had a decent turn out of 20-ish people? I haven't worked much with my co- before, but I'm thankful that it went well, and the host organizer was very easy to work with too. We walked along a path that I had had a chance to scope out a month earlier, which was really helpful as someone not as confident about leading trails. The practice run with her made me realize I might know more than I expected- at least enough for the purposes of the event. It was hard to find specimens in the cold, but not impossible, including wood ears and oysters. I think people who attended had a good time and got to come away with some good fungi fun facts like how it's safe to touch mushrooms or how to use iNaturalist. I'm really thankful for this opportunity.

Rickenella fibula

mushroomexpert.com/Rickenella_

Ecology: Probably saprobic but apparently involved in some sort of mutualism with moss; growing alone, scattered, or gregariously in moss beds; spring through fall, or over winter in warm climates; widely distributed in North America. The illustrated and described collections are from Illinois.

Cap: 2-10 mm across; blocky or squarish at first, becoming convex, then broadly convex, with or without a shallow central depression; tacky when fresh but soon dry; bald or, with a hand lens, very finely hairy; the margin translucent-lined by maturity; orange with a whitish margin when fresh and young; soon fading to yellowish orange overall, with a darker orange center.

Gills: Running deeply down the stem; distant or nearly so; short-gills in several tiers; creamy or very pale orange.

Stem: 5-45 mm long; 0.5-1.5 mm thick; equal; dry; bald; colored like the cap; basal mycelium white.

Flesh: Insubstantial; pale.

Odor and Taste: Not distinctive

Chemical Reactions: KOH negative on cap surface.

Spore Print: White.

Microscopic Features: Spores 3-4 x 1.5-2.5 m; ellipsoid; smooth; hyaline and 1- to 3-guttulate in KOH; inamyloid. Cheilocystidia and pleurocystidia 25-40 x 5-7.5 m; fusiform with tapered or subcapitate apices; thin-walled; hyaline in KOH; smooth. Pileipellis a tightly packed cutis with numerous pileocystidia 50-100 x 7.5-12.5 m, fusiform with wide bases and tapered, subcapitate, or capitate apices, thin-walled, smooth, hyaline in KOH.

Xylaria hypoxylon

mushroomexpert.com/Xylaria_hyp

Ecology: Saprobic on the deadwood of hardwoods; growing gregariously to densely gregariously; spring through fall; by strict definitions (see discussion above) distributed in Europe and the West Coast of the United States, but (mis)reported as widely distributed in North America from Canada through Mexico—and in Central America, the Caribbean, South America, Africa, Asia, and Oceania. The illustrated and described collections are from California.

Anamorphic Fruiting Body: 2-10 cm long; 2-15 mm thick; either narrowly cylindric, with a pointy apex—or cylindric below but branched and flattened above, appearing somewhat like moose antlers, with tapering points on most branches; surface black and slightly fuzzy below, but powdery and gray to nearly white above; extreme apex attenuated, whitish to yellowish, and bald; sometimes with a rooting, black, stem-like structure; interior flesh white and tough.

Teleomorphic Fruiting Body: Shaped like the anamorphic fruiting body; surface black, bald, and finely pimply.

Odor: Not distinctive.

Microscopic Features: Conidia 5-11 x 2-3 m; fusiform; smooth; hyaline in water and in KOH. Spores 13-16 x 5-6 m; subfusoid to subellipsoid; smooth; brown to dark brown in water, with a single, straight germ slit extending the length of the spore. Asci 8-spored.

Gyromitra esculenta.
A common fungus on southern Vancouver Island in early spring. Guidebooks list it as "toxic" and there have been fatalities recorded from consumption. The primary toxin, gyromitrin, is water soluble so boiling the mushrooms and discarding the water removes most of the toxin. But, gyromtrin hydrolyzes to monomethylhydrazine (aka rocket fuel) that is toxic when inhaled. So prepare them outside or in a room with good ventilation.

Helvella sulcata

mushroomexpert.com/Helvella_su

Ecology: Probably mycorrhizal; growing scattered or gregariously on and around well decayed hardwood stumps in upland woods; spring through fall; distribution uncertain but potentially widely distributed in eastern North America.

Cap: 1-5 cm across; saddle-shaped, three-lobed, or loosely and irregularly lobed or folded (especially when young); pale to dark gray--or sometimes nearly black or nearly white; bald; undersurface bald, pale gray to whitish, exposed when young or in irregular caps; margin ingrown with the stem in places when mature.

Stem: 1-6 cm long; to 2 cm wide; more or less equal; extensively ribbed, but the ribs not generally forming holes or pockets, and not extending onto the undersurface of the cap; whitish to grayish; basal mycelium white.

Chemical Reactions: KOH on surfaces negative.

Spore Print: White.

Microscopic Features: Spores: 14-18 x 10-12.5 ; elliptical; smooth; with one large oil droplet. Paraphyses hyaline to brownish in KOH and water; cylindric, becoming clavate with maturity; 4-11 wide. Excipular surface elements hyaline to brown; often arranged in bundles; frequently septate; terminal cells clavate.