North American species of Mycena.

EUMYCENA: ADONIDAE

177

80. MYCENA ADONIS (Fr.) S. F. Gray
Nat. Arr. Brit. Plants, 1: 620. 1821
Agaricus adonis Fries, Syst. Myc., 1: 152. 1821.
Illustrations:
Plate 19 B; Text fig. 17, nos. 7, 9 (p. 173).
Bresadola, Icon. Mycol., 5, pl. 224, fig. 1.
Lange, Flora Agar. Dan., 2, pl. 53 A (pileus too pink).
Ricken, Die Blatterpilze, 2, pl. 109, fig. 6.
Pileus 5-12 (15) mm. broad, either sharply or obtusely conic when
young, becoming broadly conic in age or narrowly campanulate, not
expanding, margin appressed against the stipe at first, sometimes
moist, opaque or nearly so at first, "scarlet" when fresh and moist,
becoming orange or yellowish orange before losing moisture, hygrophanous, fading to "orange buff"; flesh thin, concolorous with the
surface, fragile, odor and taste not distinctive; lamellae ascendingadnate or attached by a tooth, subdistant to close, 14-16 reach the
stipe, two or three tiers of lamellulae, narrow, yellowish or tinged
incarnate at first, margin paler and concolorous with the faces; stipe
2-4 cm. long, 1-2 mm. thick, equal, tubular, fragile, base hardly
strigose, pruinose at first, polished and glabrous in age, pale yellow,
becoming whitish, base often sordid yellow or brownish (not bister).
Spores narrowly ellipsoid, 6-7 X 3-3.5 g, nonamyloid; basidia
four-spored, 20-22 X 6-7 u; cheilocystidia and pleurocystidia abundant and similar in shape and markings, (36) 40-58 X (8) 10-15,,
fusoid and usually with a long aciculate neck (which is branched in
some), smooth (but when dried material is revived in KOH an amorphous substance apparently holds spores and debris around the neck
or apex, making them appear incrusted); gill trama very faintly vinaceous brown in iodine; pileus trama with a thin, poorly differentiated
pellicle, beneath it a region of slightly enlarged cells, the remainder
filamentous, the filamentous portion vinaceous brown in iodine.
Habit, habitat, and distribution.-Scattered to gregarious on needle
beds under spruce and hemlock in the wet coastal conifer forests,
or in the higher mountains, not uncommon in the spring and fall;
Washington, Oregon, and California.
Material studied.-Smith, 2490, 2597, 3332, 3711, 13102, 13655.
Observations.-The occurrence of this fungus in the higher mountains and along the coast in our western states is in line with the dis