[Vor. 5 
364 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Herb.) ; Alto Cedro, Underwood & Earle, 1527, comm. by N. 
Y. Bot. Gard. Herb. 
34. H. opaca Burt, n. sp. 
Type: in Burt Herb. and N. Y. Bot. Gard. Herb. 
Fruetifieations resupinate, effused, adnate, when young 
slightly velvety, very thin, and between bister and Vandyke- 
brown, finally becoming glabrous, somewhat thicker, Vandyke- 
brown and cracked, the margin 
thinning out; in structure 200-300 
и thick, lacking an intermediate 
layer, with the setigerous layer very 
ЦИ Щи SQ dense and opaque and composed of 
қаш suberect, interwoven, dark hyphae, 
Fig. 30 and of setae; setae 50-90 8-10 y, 
emerging up to 60 д, starting from 
all parts of the setigerous layer; 
spores hyaline, even, 3$-5 13-2 и. 
Fruetifieations 3-5x 1-2 cm. 
On bark of dead frondose limbs. Wet, wooded region, 
2000—4000 ft. altitude. Jamaiea. December and January. 
H. opaca belongs in the group with H. corrugata and H. 
tenuis, from both of which it differs by its velvety surface 
when young, different color, darker hyphae, and denser and 
more opaque strueture in sectional preparations. 
Specimens examined: 
Jamaica: Chester Vale, W. 4. Ф Edna L. Murrill, 297, comm. 
by N. Y. Bot. Gard. Herb.; Cinchona, W. A. & Edna L. 
Murrill, 538, type, comm. by N. Y. Bot. Gard. Herb.; Troy 
and Туге, W. A. Murrill Ф W. Harris, 923, 937, comm. by 
N. Y. Bot. Gard. Herb. 
35. H. tenuis Peck, N. Y. State Mus. Rept. 40 : 57. 1887; 
Saee. Syll. Fung. 6 : 599. 1888; Massee, Linn. Soc. Bot. Jour. 
27: 109. 1890. 
Type: in N. Y. State Mus. Herb. 
Fructifieations resupinate, effused, becoming confluent, very 
thin, adnate, somewhat cracked, velvety, drying from raw 
umber to mummy-brown, the margin thinning out, indeter- 
mac 
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H. opaca. 
Section X 68. From type. 
