Psathyrella candolleana (Fr.:Fr.) Maire

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6. Hypholoma Candolleanum Fries, Epicr. Syst. Mye. 224.
1838.
(plate 26, fig. 12; plate 27, fig. 18; plate 28, fig. 29)
Pileus 5-10 cm. broad, convex, sub-campanulate, finally ex-
landed, hygrophanous, bay or date-brown when young and .
loist, becoming white with yellow or ochraceous center when i
ry, smooth or faintly striate on the margin, frequently splitting
longitudinally and with the margin upturned; context sub-
membranous, thin, white; gills adnexed, and broadly sinuate
behind, close, narrow, violet-tinted in young plants, later cinna-
mon-brown or purplish-brown; stem 5-7 cm. long, 3-7 mm. thick,
glabrous or at times fibrillose, hollow, striate above, easily
splitting longitudinally, white; veil adorns .young plants as a
thin, white, woven membrane; spores 8-9 X 4-5 ju, smooth,
elliptic; cystidia on edge of gills, subcylindric, sub-ventricose,
projecting 20-35 /x, 9-11 n in width.
Habitat: On ground about very rotten logs or stumps.
Habit: Caespitose or scattered.
Type locality: Sweden.
Distribution: New York, Pennsylvania, Maryland, District of
Columbia, Illinois, and Washington.
Illustrations : Britzelmayer, Hym. pi. 309, fig. Ill; Cooke,
111. Brit. Fungi pi. 546 [586\; Corda, Ic. pi. 63, fig. 8; Harper,
Trans. Wise. Acad. Sci. 17: pi. 83B.
See H. appendiculatum Bull, ex Fries for data as to the dif-
ferences between this species and H. incertum Peck.
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FUNGI EXSICOATI SUECIOI, PILESERTIM UPSALIENSES.
Ed. cur. Seth Lundell et J. A. Nannfeldt.
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128. Hypholoma Oandollianum (Fr., Syst. myc. I p. 296, sub
Agarico).
On or near decaying stumps of Populus Iremula, also on
rich soil close to stumps of frondose trees.
Upland:	Bondkyrka	parish,	»Stabby	backar»	(near
Upsala).
29. VII. 1934.
Seth Lundell.
Is usually called H. appendiculatum (Bull, ex Er.), but this species —
at least sensu Pries — is probably different, and moreover, not described
by him until in Epicr. p. 427. Thus H. Candollianum is the valid name
for our fungus (comp. Lange in Dansk Bot. Ark. 4: 4 p. 43). The
illustration of Agaricus (Hypholoma) coronatus Fr. in Fries, Icon. sel.
tab. 134: 3, represents our species with the veil unusually strongly de-
veloped. Also Bresadola, Icon. Myc. XVIII tab. 851 (sub nom. H. coro-
natum), is this species as well as 852 and 853 (the later sub nom. H.
appendiculatum).
Spores 7—8 x 4—4,5 (—5) ¡x. -»S. L.
Candolleomyces candolleanus (Fr.) D.Wächt.& A.Melzer
1
NEW YORK BOTANICAL GARDEN
03028118
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