Summary:
{See also Earthstars Table.} "For purposes of field identification, G. fimbriatum might be regarded as an example of G. saccatum, without a line delimiting the mouth of the spore sac. There are other characters, such as the smaller spores which distinguish it." (Smith(49), Latin names italicized). Features include 5-9 non-hygroscopic rays, stemless or very short-stalked spore case, fibrillose peristome (mouth), comparative pale spore mass with pale capillitial hyphae, and small finely verruculose spores (Pegler(4)).

Microscopic:
spores 3-3.7 microns in diameter excluding ornamentation, 3.3-4 microns including ornamentation, round, "yellow-brown, finely verruculose", verruculae 0.1-0.3 microns high, about 0.2-0.5 microns wide, fine, isolated; basidia not seen; capillitial hyphae 2.5-7 microns wide, walls thickened, pale yellowish to almost colorless, finely tapered to the tips, "smooth or finely encrusted, especially towards the tips"; spore case with hairs that are hyphae 30-160 x 10-20 microns, cylindric-clavate, hyaline or pale yellowish, with thickened, refractive walls, (Pegler), spores 3-3.5 microns in diameter, round, with a very thin colorless envelope and minute projections extending into it, dark brown; capillitial threads 4-7 microns wide, nearly colorless (both in KOH and in iodine), very thick-walled, unbranched; forma pallidum has colorless spores and capillitium, (Smith(49))

Notes:
A collection from BC by A. McKinnon was deposited at the University of British Columbia and determined by P. Kroeger. Another BC collection at the University of British Columbia was collected by R. Winder and O. Ceska and determined by O. Ceska. Schalkwijk-Barendsen(1) lists the species for AB.

Synonyms and Alternate Names:
Peniophora accedens (Bourdot & Galzin) Wakef. & A. Pearson
Peniophora glebulosa subsp. accedens Bourdot & Galzin