Covered with hair-like appendages, as the undersurface of some lichens.(adjective)
Composed of little strings or fibres.(adjective)
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Use "fibrillose" in a sentence
"+Stem+ nearly equal, 2 to 3 inches long, 2 to 4 lines thick, firm, hollow, slightly fibrillose, whitish or yellowish above, reddish-brown below."
"Pileus, scaly or warted.campanulate. silky, cracked or fibrillose.umbonate. umbilicate. striate."
"It is, both outside and inside, of a whitish violet color, often fibrillose above, with the cortina, and sometimes with the white veil, in the form of a zone at the middle."