E RS 
1920] 
BURT—THELEPHORACEAE OF NORTH AMERICA. XII ZE 
becoming confluent, sometimes becoming narrowly reflexed, 
with the upper surface villose, varying from buffy brown to 
Natal-brown, becoming somewhat zonate when reflexed about 
5 mm., the margin entire and 
usually whitish; hymenium even, 
somewhat velvety, bister or snuff- 
brown, becoming light drab and 
somewhat pruinose with age; in » 
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structure about 500 y thick, the — //77 i 
intermediate layer with a darker 
zone on its upper side and com- 4&7% 
posed of loosely, longitudinally l i l 
arranged, slightly colored hyphae ae Ed D. A oM 
: : : ; cystidium, c, paraphyses, p, 
3-33 u in diameter; hymenium and spores, s, X 665. 
30—45 u thick, not zonate, having 
incrusted cystidia 30-45X8-15 u all confined to the single- 
layered hymenium, protruding up to 25 u; branched, filiform 
paraphyses 2 » in diameter, becoming colored, are present also 
in the hymenium, basidia simple, 4-spored; spores white in 
spore collection, even, flattened on one side, 6-11 xX343 a. 
Fructifications 5-10 mm. in diameter, becoming confluent 
over areas 1-2 em. wide and 3 to many cm. long, and reflexed 
2-5 mm. 
On dead frondose wood and fallen limbs. New York to 
Mexico and westward to Idaho and Arizona, in the West Indies, 
and reported from Brazil. Throughout the year. Common. 
S. albobadium may usually be recognized by its brown, velvety 
hymenium with a white border; with age the hymenium tends 
to become more uniformly light drab or pruinose, but some 
small fructifications in the vicinity are likely to show the original 
color contrasts. This species has a wide geographic range and is 
somewhat variable in coloration but is very constant in micro- 
scopic structure; the branched, colored paraphyses are highly 
distinctive. 
Specimens examined: 
Exsiccati: Bartholomew, Fungi Col., 3688, 4784; Ellis, N. Am. 
Fungi, 15; Ravenel, Fungi Am., 221, 449; Ravenel, Fungi 
Car. 1: 29. 
New York: Grand View, H. von Schrenk (in Mo. Bot. Gard. 
