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Hypholoma

Field characters

Pileus: smooth, colored reddish brown, yellowish or greenish
Annulus: present or absent, if present fibrillose
Stipe: fleshy, centric
Stature: Naucorioid
Ecology: saprophyte, mostly on living or dead wood
99J17C_5_1_H_sublateritium_Fr_Quel.jpg

Micro characters

Basidiospores: smooth with germ pore
Cystidia: chrysocystidia present (see photo)
Spore Print: dark brown to purple-brown
Lamellae: adnexed, adnate or short decurrent, white or greenish when young, becoming the color of the spores.
Lamellar Trama: regular
Pileipellis: hyphae below surface with inflated cells

Notes

There are some nomenclatural problems with this mushroom. Lincoff, 1981, Arora, 1986 and Singer, 1986 use the name Naematoloma as a synonym. Largent and Baroni, 1988 use Hypholoma but state that both names are used by different agariciologists. Roody, 2003 uses Hypholoma. Singer, 1986 should be consulted for the discussion if interested in nomenclatural debate. He says that Naematoloma is the proper name, and Hypholoma would only be proper if used to replace Psathyrella (based, it appears, on the structure of pileipellis).

Our common species, quite abundant in the late summer and early fall is commonly called "brick top" (H. sublateritium). The specific epithet means "nearly brick colored" Roody, 2003. Another species (H. fasciculare), the "sulfur tuft" is poisonous. Both species are illustrated here.

Pholiota is another brown-spored mushroom found on wood. It's spores are much more rusty brown in color.

Bessette et al., 1997 say it is a small genus, and describe five species.