Microscopic:
spores 100-160 x 6-7 microns, 15-septate at maturity, in a parallel fascicle in the ascus, brown, cylindric-clavate, broadest above the middle, tapering each way to the obtuse ends; asci 8-spored, up to 210-225 microns long and 20-22 microns wide, broadly club-shaped, apex narrowed, the pore blue with iodine; paraphyses up to 3 microns in lower part, up to 8 microns thick in upper part, "brown, cylindric, septate, usually strongly curved, or coiled at the slightly thickened tips"; hymenial spines numerous, 8-10 microns thick, variable in length, usually projecting about one-third their length beyond the hymenium, straight, acute, black, opaque, (Seaver), var. hirsutum: spores 80-170 x 5-7 microns, fusoid-clavate, narrowing toward each end from above middle, asci 8-spored, 180-275 x 18-25 microns, clavate, the variety usually being described as having regularly 15-septate spores; paraphyses cylindric, moderately septate, somewhat enlarged and straight or curved to circinate [twisted or coiled] in upper part, setae abundant, acuminate, dark brown, projecting 1/4 to 1/3 their lengths above the hymenium, var. longisporum (Tai) Mains with long spores 156-190 x 6-7 microns and asci 237-281 x 19-25 microns for type from China, but in collections from California spores (120)133-180(195) x 6-7 microns, fusoid-clavate, mostly 15-septate, asci 225-275, clavate, var. irregulare Mains with only some spores 15-septate (22-82% in various collections of this variety) and measuring (90)100-150(165) x 5-7 microns, var. heterosporum Mains from at least TN with spores 8-21-septate (64% of spores less than 15-septate and 21% more in various collections), and measuring (95)120-150(160) x 5-6 microns with asci 175-200 x 17-20 microns, var. multiseptatum Mains from TN with spores 12-22 septate (21% less than 15-septate 57% greater than 15-septate in 2 collections) and (145)160-195(210) x 6 microns, long and fusoid-clavate, with 8-spored asci 210-225 x 20-25 microns, clavate, (Mains), hairs dark brown, pointed, straight, up to 180 x 8-9 microns, (Breitenbach), spores 80-210 x 5-7 microns, with about 15 cross-walls, (Trudell)

EDIBILITY

supposedly edible but too tough to be worthwhile, (Arora)

Synonyms and Alternate Names:
Geoglossum hirsutum Pers.
Odontia quercinum Pers.
Radulum quercinum (Pers.) Fr.
Trichoglossum gracile Pat.