Gliophorus psittacinus

https://www.mushroomexpert.com/Gliophorus_psittacinus.html

Ecology: Precise ecological role uncertain (see Lodge and collaborators, 2013); appearing in hardwood and conifer forests; growing scattered to gregariously; frequently found in moss, or on mossy embankments along wooded roadsides; spring through fall (or over winter in warmer climates); widely distributed in North America, at least as a species group. The illustrated and described collections are from Illinois, Michigan, and Québec.

Cap: 5-25 mm across; hemispheric to suboval, expanding to broadly convex or nearly flat; bald; slimy; variable in colors but frequently dark green at first, quickly fading to orangish yellow from the center outward (sometimes sometimes orange with a greenish margin, fading to orange); finally dull orangish yellow; the margin often thinly lined.

Gills: Narrowly attached to the stem; close or nearly distant; usually pale green at first, becoming yellowish--but sometimes orange-yellow throughout development; short-gills frequent.

Stem: 10-40 mm long; 2-3 mm thick; equal; bald; slimy; pale green above and orangish yellow below when young, fading to pale yellowish overall.

Flesh: Whitish; thin.

Odor and Taste: Odor not distinctive, or somewhat foul; taste of slime slightly acidic.

Spore Print: White.

Microscopic Features: Spores 6-9 x 3.5-4.5 ; smooth; ellipsoid; hyaline and multiguttulate in KOH; inamyloid. Basidia 35-45 long; 4-sterigmate or, occasionally, 2-sterigmate. Hymenial cystidia absent. Lamellar trama parallel. Pileipellis an ixocutis.

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Caloboletus inedulis

https://www.mushroomexpert.com/Caloboletus_inedulis.html

Ecology: Mycorrhizal with hardwoods (especially oaks), or with eastern hemlock; usually growing gregariously; summer and fall; widely distributed in North America east of the Great Plains; also documented from Central America. The illustrated and described collections are from Illinois and Indiana.

Cap: 4-13 cm; convex, becoming broadly convex; dry; when young finely velvety or kid-leathery to the touch, becoming bald and usually cracking up with age so that whitish flesh shows through the cracks; margin inrolled, with a 1-2 mm overhanging sterile portion; whitish to pale tan or brown.

Pore Surface: Dull yellow at first, becoming olive and eventually pale olive brown; bruising blue promptly; 2-4 angular pores per mm at maturity; tubes 10-15 mm deep.

Stem: 4-9 cm long; 1-2 cm thick; equal above a slightly swollen base; ground color whitish or yellowish to brownish (often paler toward apex), but sometimes developing pink to red streaks; sometimes finely reticulate over the upper portion with a pink to red reticulum, but often without reticulation—or with small, red, scaber-like dots; basal mycelium white.

Flesh: Whitish; soft; staining pale blue on exposure; purple-red in the stem.

Odor and Taste: Odor not distinctive; taste bitter.

Chemical Reactions: Ammonia negative on cap surface and flesh. KOH on cap surface negative to pale orange; on flesh orangish. Iron salts gray to blue-gray on cap surface; negative on flesh.

Spore Print: Olive brown.

Microscopic Features: Spores 9-15 x 3-5 m; boletoid-fusiform;
smooth; yellowish in KOH. Basidia 4-sterigmate. Hymenial cystidia 20-30 x 4-6 m; lageniform to fusiform; smooth; thin-walled; hyaline in KOH. Pileipellis a cutis; elements 4-10 m wide, smooth or encrusted, hyaline to yellowish- or brownish-walled in KOH. Contextual hyphae hyaline to yellowish in Melzer's reagent; inamyloid.

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Entoloma luridum

https://www.mushroomexpert.com/Entoloma_luridum.html

Ecology: Saprobic (possibly mycorrhizal?); growing alone or gregariously under conifers; late summer and fall; originally described from Tennessee (Hesler 1967); distributed in eastern North America from the Great Lakes region to the Appalachians and the Maritime Provinces. The illustrated and described collection is from Wisconsin.

Cap: 5-8 cm across; broadly conic to broadly bell-shaped; bald; moist or dry; the margin becoming broadly wrinkled; pale creamy yellow; hygrophanous.

Gills: Narrowly attached to the stem; close; short-gills frequent; fairly bright yellow, becoming brownish pink as spores mature.

Stem: 6-10 cm long; 1-2 cm thick; equal or slightly tapered to apex; dry; bald; whitish to yellowish; basal mycelium white.

Flesh: Thick; white; unchanging when sliced.

Odor: Not distinctive.

Spore Print: Brownish pink.

Microscopic Features: Spores 5-10 x 5-7 m; angular; predominately 7-sided; subglobose to ellipsoid overall, with a large apiculus; smooth; thin-walled; hyaline in KOH; inamyloid. Basidia 35-40 x 6-10 m; clavate; 4-sterigmate. Hymenial cystidia not found. Pileipellis an ixocutis; elements 4-8 m wide, smooth, hyaline in KOH; subcutis of inflated elements. Clamp connections present.

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Colus pusillus

https://www.mushroomexpert.com/Colus_pusillus.html

Note: The description below is based on the photos sent to me, and on the sources cited below. I have not studied any collections of Colus pusillus.

Ecology: Saprobic; growing alone or gregariously; in woods or in cultivated areas; year-round in tropical and subtropical areas; possibly limited to Oceania.

Fruiting Body: Initially a whitish "egg" up to 2 cm across, attached to white cords; rupturing, with the stinkhorn emerging as a cage-like structure, 5-8 cm high, composed of about 10 corrugated, scarlet arms that are roughly triangular in cross-section and that sometimes fuse into a stem-like and slightly paler base composed of vertical columns; the inner surfaces of the cage covered with foul-smelling, olive brown slime; the egg tissue creating a whitish volva.

Microscopic Features: Spores 4.5-6 x 1.5-2 m; cylindric; smooth; hyaline in KOH.

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Lactarius paradoxus

https://www.mushroomexpert.com/Lactarius_paradoxus.html

Ecology: Mycorrhizal with pines (especially loblolly pine and long-leaf pine); growing alone or gregariously, often in grassy areas near the host trees; summer and fall; originally described from Florida (Beardslee & Birmingham 1940); fairly widely distributed in eastern North America, but more common in the lower Appalachians and the southeastern states; also recorded from the Caribbean and the Gulf Coast of Mexico. The illustrated and described collections are from Arkansas, Georgia, Florida, and Texas.

Cap: 4-13 cm; broadly convex with a slightly tucked-under margin when young; becoming centrally depressed, with an uplifted margin, or shallowly vase-shaped; slimy when fresh; bald; dark blue to bluish, with a silvery sheen when young, becoming dirty grayish to purplish tan; often with faint to moderate concentric zones of color; with old age staining dirty green and eventually becoming sordid bluish green overall.

Gills: Broadly attached to the stem or just beginning to run down it; close; short-gills present; purplish pink when young, becoming dirty buff to orangish with maturity; staining and bruising dirty green.

Stem: 2-5 cm long; 1-1.5 cm thick; usually tapered to the base; bald; without potholes; dry; colored like the cap, but with purplish pink flushes—or purplish pink overall; staining dirty green with age; hollowing.

Flesh: Whitish to bluish, greenish, or purplish (or brownish in the mature, hollowing stem); firm; staining purplish red in places when sliced.

Milk: Very scant; dark purplish red; staining surfaces purplish red.

Odor and Taste: Not distinctive.

Spore Print: Pale yellowish.

Microscopic Features: Spores 7-10 x 5.5-6.5 m; ellipsoid; ornamentation consisting of amyloid warts and ridges extending 0.5-0.75 m high, forming partial reticula. Hymenial macrocystidia rare; to about 60 m long; mucronate; scarcely projecting. Pileipellis a thick ixocutis.

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Ascocoryne cylichnium

https://www.mushroomexpert.com/Ascocoryne_cylichnium.html

Ecology: Saprobic on the well-decayed, wet wood of hardwoods or conifers; usually growing gregariously or clustered; fall and winter; widely distributed in North America.

Fruiting Body: 5-22 mm across; disc-shaped to cup-shaped or goblet-shaped; gelatinous; upper surface purple and bald; undersurface similar to upper surface, or paler and finely fuzzy; with or without a poorly defined stem-like structure; odorless.

Microscopic Features: Spores 18-27 x 4-6 ; smooth; fusiform; multiguttulate; developing several septa with maturity; often with small, subglobose conidia forming, especially at the ends (conidia not coalescing into chains). Asci eight-spored; up to 220 x 15 ; extreme apices blue in Melzer's reagent. Paraphyses filiform, with subclavate to clavate or subcapitate apices 1-3 wide.

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Boletus pseudosensibilis

https://www.mushroomexpert.com/Boletus_pseudosensibilis.html

Ecology: Mycorrhizal with oaks, and possibly with other hardwoods; growing scattered, or gregariously; summer and fall; widely distributed in eastern North America. The illustrated and described collections are from Illinois.

Cap: 4-16 cm; convex, becoming broadly convex; dry; finely velvety when young but soon bald; red to reddish brown or pinkish brown (most commonly reddish brown), fading to pinkish tan; when young sometimes bruising grayish where rubbed; the margin at first tucked under.

Pore Surface: Bright yellow when young, maturing to dirty orangish olive; when very young not bruising, or bruising only faintly, but soon bruising promptly blue, then slowly brown; with 1-2 circular to angular pores per mm at maturity; tubes shallow, 4-8 mm deep (rarely to 10 mm deep, in very large caps).

Stem: 6-10 cm long; 1-2.5 cm thick; usually tapered at the base; dry; solid; bald; yellow overall, with reddish tinges developing in the bottom half; bruising light blue where handled (then, over time, slowly brownish); not reticulate; basal mycelium pale to dark yellow, or sometimes whitish.

Flesh: Yellow in the cap; deep yellow or sometimes reddish in the stem; staining blue on exposure--sometimes faintly and erratically (staining usually more pronounced on older specimens).

Odor and Taste: Not distinctive.

Chemical Reactions: Ammonia flashing purplish blue to blue-green, then resolving to negative, grayish, or orangish on cap surface; negative on flesh. KOH reddish to dull orange or negative on cap surface; orangish on flesh. Iron salts grayish on cap; grayish or negative on flesh.

Spore Print: Dull olive brown.

Microscopic Features: Spores 9-12.5 x 3.5-4.5 ; subfusoid; smooth; orangish brown to golden in KOH; brownish in Melzer's. Hymenial cystidia fusoid-ventricose; 20-35 x 5-10 ; hyaline or with orangish contents in KOH. Pileipellis a collapsing trichoderm of elements 5-12.5 (-15) wide, smooth, hyaline to ochraceous or golden in KOH; at first with primarily tubular terminal cells, but by maturity developing many subterminal and terminal cells that are septate at short intervals, with terminal cell tubular or obnapiform.

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Amanita flavorubescens

https://www.mushroomexpert.com/Amanita_flavorubescens.html

Ecology: Mycorrhizal with hardwoods (especially oaks), but sometimes reported under conifers; occasionally found in urban habitats when trees are near; growing alone, scattered, or gregariously; spring through fall; fairly widely distributed east of the Rocky Mountains, but also known from Arizona and central Mexico.

Cap: 4.5-14 cm; convex, becoming broadly convex or nearly flat; sticky at first or when wet; bright yellow to yellow-brown (often brighter yellow toward the margin, especially when young); sometimes bruising slowly reddish; adorned with conspicuous, woolly to felty, yellow warts; bald underneath the warts; the margin not lined, or only faintly lined at maturity.

Gills: Free from the stem or slightly attached to it; white; close or crowded; short-gills frequent.

Stem: 6-15 cm long; 0.5-1.5 cm thick; more or less equal above a slightly swollen base; bald, or somewhat shaggy below the ring; pale yellow to whitish, bruising and staining slowly reddish; the ring persistent, skirtlike, and whitish to yellowish (sometimes featuring yellow stains at the edges); base often adorned with yellow volval remnants that break up and become indistinct, leaving yellow remnants on the soil.

Flesh: White to yellowish throughout; staining slowly reddish, especially in the base of the stem.

Odor: Not distinctive.

Spore Print: White.

Microscopic Features: Spores 6-11 x 4.5-7 ; smooth; ellipsoid; amyloid. Basidia without clamps; 4-spored. Pileipellis an ixocutis of hyphae 2-6 wide. Lamellar trama bilateral; subhymenium ramose.

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Syzygites megalocarpus

https://www.mushroomexpert.com/Syzygites_megalocarpus.html

Ecology: Parasitic on diverse mushrooms; widely distributed in North America.

Fruiting Body: A fuzzy mold covering the victim's surfaces; yellow becoming bluish or gray.

Microscopic Features: Sporangiophores septate, dichotomously branched up to 6 times, with sporangia at the tips. Spores 5-35 ; round or irregular; surface roughened.

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