The North American species of Psathyrella.

464

MEMOIRS OF THE NEW YORK BOTANICAL GARDEN

[VOL. 24

A 1925
194 195
16196
\' c197 197
FIGS. 185-197. Figs. 185-186, P. hydrophila: 185, pleurocystidia; 186, spores. Figs. 187-188,
P. ogemawensis: 187, spores; 188, pleurocystidia. Figs. 189-190, P. avellaneifolia var.
avellaneifolia: 189, pleurocystidia; 190, cheilocystidia. Figs. 191-192, P. avellaneifolia var.
perplexa: 191, spores; 192, pleurocystidia. Figs. 193-196, P. paradoxa var. paradoxa: 193,
spores; 194, cheilocystidia; 195, pleurocystidia; 196, caulocystidia. Fig. 197, spores of
P. paradoxa var. velicopia.