A monograph on the genus Galerina Earle / by Alexander H. Smith and Rolf Singer.

298

The Genus Galerina Earle

Spores 7-9 X 4.5-5.5 p, inequilateral in profile, in face view ovate to
oval, tawny in KOH, outer wall loosening around the depression which
is smooth, remainder of surface minutely warted. Basidia 4-spored. Pleurocystidia scattered, 34-56 X 12-18 /, ventricose with short necks and obtuse
to rounded apices. Cheilocystidia 40-58 X 10-15 u, fusoid-ventricose with
obtuse apices. Gill trama subparallel, hyaline or nearly so in KOH. Pileus
trama homogeneous, hyaline to pale ochraceous in KOH. Clamp connections present.
HABIT, HABITAT AND DISTRIBUTION: Scattered on remains of herbaceous
stems (of Capnoides), Green Lake, Mt. Rainier National Park, Washington,
Oct. 17, 1952.
OBSERVATIONS: The very soft context, broadly ventricose pleurocystidia, and the change in color of the base of the stipe when bruised, are distinctive. The veil remnants, though forming a thin zone at first, soon vanish.
In many respects this species connects the Stirps Vittaeformis with Stirps
Cedretorum. The habitat is most unusual for a Galerina. The carpophores occur singly along the old stems, in the manner of many species of Psilocybe
which have a similar type of habitat.
OBSERVATIONS: The pleurocystidia might lead one to look for this species in Physocystis but the variation is toward the subacute apex as often
shown in var. latifolia, so we place the species here.
MATERIAL EXAMINED: Smith 41074-type; 41077; 41082; 41083; 41100;
48167; 48168.
174a. Galerina mollis var. latifolia Smith, var. nov.
Illustrations: Figs. 195 (pleurocystidia), 196 (cheilocystidia).
Pileus 10-20 mm latus, obtusus, demum planus et umbonatus, pallide
fulvus; lamellae subdistantes, latae, late-adnatae, stipes 20-30 mm longus,
1-2 mm crassus, fragilis, sursum subfulvus, deorsum castaneus; sporae
8-10.5 X 4.5-5.2 /; pleurocystidia 48-65 X 10-16 /; cheilocystidia pleurocystidiis similia. Specimen typicum legit Smith 41066 (MICH), prope Green
Lake, Mt. Rainier National Park, Washington, 17 Oct. 1952.
Pileus 10-20 mm broad, obtuse, expanding to plane or with a slight
obtuse umbo, surface glabrous, moist, hygrophanous, "ochraceous tawny,"
margin striate, fading to pinkish buff; flesh exceedingly soft and fragile,
concolorous with surface, odor and taste none.
Lamellae subdistant, broad, broadly adnate, readily seceding, with
decurrent lines down apex of stipe, edges even.
Stipe 20-30 mm long, 1-2 mm thick, equal, hollow, exceedingly fragile,
concolorous with gills above, dull chestnut brown below, fibrils over lower
part grayish.
Spores 8-10(10.5) X 4.5-5.2 /I, inequilateral in profile, ovate in face
view, wall minutely roughened and with a ragged line around the depression, ochraceous tawny in KOH. Basidia 4-spored (one pileus 2-spored and
spores 9-11 X 5.5-7 I,). Pleurocystidia abundant, fusoid-ventricose, 48 -