[Vor. 7 
100 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
the largest specimen of S. exiguum. While differences in size 
are not generally a good criterion for specific distinction, I am 
inclined to think that they will prove so in this instance. 
Specimens examined: 
New York: Westport, C. H. Peck, type (in N. Y. State Mus. 
Herb. and in Burt Herb.). 
I2. S. tenerrimum Berk. & Ravenel, Grevillea 1: 162. 1873; 
Saec. Syll. Fung. 6: 551. 1888; Massee, Linn. Soc. Bot. Jour. 
27: 165. 1890. Plate 2, fig. 11. 
Type: in Kew Herb. and Curtis Herb. 
Pileus coriaceous, thin, infundibuliform or flabelliform, soon 
lobed and split, upper surface slightly rough, fibrillose-striate, 
not zonate or only very indistinctly “pale tan" when collected, 
becoming tawny olive to Saecardo's umber in the herbarium; 
stem filiform, whitish, bearing some fibrils towards the base; 
hymenium even, concolorous, setulose with hyaline hairs 
under a lens; pileus in section 300 y thick, composed of longi- 
tudinally and densely arranged hyaline hyphae 3 y in diameter; 
cystidia hair-like, not incrusted, 4-8 y in diameter, protruding 
30-50 u; spores hyaline, even, subglobose, 4-5 K 3-4 u. 
Fructifications 2-10 mm. broad, 5mm.-23 cm. high; stem 
3-7 mm. long, 4-3 mm. thick. 
On ground among mosses. New York, Wisconsin, South 
Carolina, and Cuba. July to November. Rare. 
The collections which I have referred to S. tenerrimum are 
from the widely separated localities stated above and only a 
single gathering of several fructifications at each locality. There 
are slight differences between the specimens of the several 
gatherings, but not great enough to preclude their reference 
to a single species, although doing so has required some general- 
ization from the original description. 
S. tenerrimum is related to S. undulatum of northern Europe 
as known to me by the specimens distributed in Karsten, Fungi 
Fennicae, 912, and by the extended account by Maire, Ann. 
Myc. 7: 426-431, text f. 1, 2. 1909, but the latter species 
attains much larger size, has a coarser stem, and is infundibuli- 
form with central stem. None of the collections of S. tenerri- 
mum are composed wholly of specimens with infundibuliform 
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