314 STUDIES OF AMERICAN FUNGI. 



Furfuraceous, with numerous minute scales. 



Gleba, tiie chambered tissue forming the hymenium (fruiting surface) in the puff- 

 balls and their allies. 



Hygrophanous, appearing to be water-soaked. 



Hymenium, the fruiting surface of the mushrooms and other fungi. 



iHymenomycetes, the subdivision of the Basidiomycetes in which the fruiting 

 surface is exposed before the spores are ripe. 



Hymenophore, the portion of the fruit body which bears the hymenium. 



Hypha (pi. hyphce), a single mycelium thread. 



Imbricate, overlapping like the shingles of a roof. 



Involute, folded or rolled inward. 



Lamella (pi. lamellae), the gills of the mushroom. 



Mycelium, the vegetative or growing portion of the mushrooms, and other fungi, 

 made up of several or many threads. 



Ocreate, applied to the volva where it fits the lower part of the stem, as a stock- 

 ing does the leg. 



Pectinate, like the teeth of a comb. 



Peridium, the wall of the puff-balls, etc. 



Pileus (pi. pilei), the cap of the mushroom. 



Plicate, plaited, or folded like a fan. 



Punctate, with minute points. 



Pulverulent, with a minute powdery substance. 



Repand, wavy. 



Resupinate, spread over the matrix, the fruiting surface external and the pileus 

 next the wood. 



Revolute, rolled backward. 



Rugose, wrinkled. 



Rugulose, with minute wrinkles. 



Saprophytic, growing on dead organic matter. 



Sessile, where the pileus is attached directly to the matrix without any stem. 



Sinuate, said of the gills when they are notched at their junction with the stem. 



Stipe, the stem. 



Sulcate, furrowed. 



Squamulose, with minute scales. 



Squarrose, with prominent reflexed scales. 



Tomentose, with a dense, matted, hairy or woolly surface. 



Trama, the interior portion of the gills or pileus. 



Umbo, with a prominent boss or elevation in the center of the pileus. 



Umbilicate, with a minute abrupt depression in the center of the cap. 



Veil, a layer of threads extending from the margin of the cap to' the stem (partial 

 veil or marginal veil). A universal veil envelopes the entire plant. 



Veins, elevated lines or folds running over the surface of the lamellae in some 

 species, and often connected so as to form reticulations. 



Ventricose, enlarged or broadened at the middle, bellied. 



Vesiculose, full of small rounded vesicles, as the trama of thepileusof aRussula. 



Volva, a wrapper or envelope, which in the young stage completely surrounds 

 the plant, same as universal veil. At maturity of the plant it may be left 

 in the form of a cup at the base of the stem, or broken up into fragments 

 and distributed over the cap and base of the stem. 



