North American species of Mycena.

412 NORTH AMERICAN SPECIES OF MYCENA

flesh thin and pliant, odor and taste not known; lamellae arcuatedecurrent, subdistant to close, 20-24 reach the stipe, moderately
broad (3 mm.), whitish or pale yellowish to orange, margin a deeper
orange; stipe 4-8 cm. long, 1-1.5 mm. thick, equal, viscid, with a
dense orange-pruinose covering toward the apex, the base densely
white- or grayish-strigose and rooting somewhat in the substratum,
yellowish to orange above, becoming whitish, sordid grayish, or sordid
grayish brown toward the base.
Spores ovoid, 4.5-6 X 3.5 j, amyloid; basidia two-spored or
occasionally four-spored, 18-22 X 4-5.5,u; cheilocystidia fusoid-ventricose at first, soon with the apex more or less lobed or divided, sometimes furnished with obtuse knoblike protuberances, variously contorted and irregular in outline, 22-32 X 5-9,t; pleurocystidia absent;
gill trama with a gelatinous subhymenium in revived material, the
floccose central strand vinaceous brown in iodine; pileus trama with a
thick gelatinous surface pellicle, the tissue beneath floccose and vinaceous brown in iodine, the subhymenium gelatinous.
Habit, habitat, and distribution.-Densely cespitose on oak logs
and stumps during rainy weather in September; Florida and Texas.
Observations.-When sections are mounted in iodine the surface
of the gelatinous pellicle appears bluish because of the large number
of spores that have accumulated there. M. texensis is very closely
related to M. Leaiana. The gelatinous pellicle over the pileus and
stipe, the orange-pruinose stipe and yellowish to orange gills with
brighter edges, and the densely cespitose habit all clearly relate it to
that species. It differs in the very small spores, the short narrow
basidia, and the grayish colors of the pileus as well as in the shape and
distribution of the cystidia. I have not seen fresh material.
210. MYCENA LEAIANA (Berk.) Saccardo
Syll. Fung., 9: 38. 1891
Agaricus (Mycena) Leaiana Berkeley, Lond. Journ. Bot., 4: 300. 1845.
Collybia Leaiana Fairman, Proc. Rochester Acad. Sci., 2: 155. 1893.
Prunulus Leaianus Murrill, North Am. Flora, 9: 333. 1916.
Illustrations:
Plate 90; Text fig. 50, nos. 2, 4-5 (p. 411).
Beardslee and Coker, Journ. Elisha Mitchell Sci. Soc., 40, pl. 12 (lower).
Glssow and Odell, Mushrooms and Toadstools, pl. 56, fig. 1.