[Vor. 4 
338 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Specimens examined: 
Cuba: C. Wright, 245, cotype (in Curtis Herb.), and 569, 
cotype of Corticium saccharinum (in Curtis Herb.) ; Alto 
Cedro, L. M. Underwood & Е. S. Earle, 1527 A4, N. У. Bot. 
Gard. Herb.; Ceballos, C. J. Humphrey, 2582 (in Mo. Bot. 
Gard. Herb., 16058); Ciego de Avila, F. S. Earle & W. A. 
Murrill, 612, 620, №. Y. Bot. Gard. Herb.; Herradura, Е. 5. 
Earle & W. A. Murrill, 109, N. Y. Bot. Gard. Herb.; San 
Diego de los Baños, F. S. Earle € W. A. Murrill, 226, 315, 
N. Y. Bot. Gard. Herb. 
Jamaica: Troy and Tyre, Cockpit Country, W. A. Murrill Ф 
W. Harris, 918, 965, N. Y. Bot. Gard. Herb. 
25. M. rufus Persoon, Syn. Fung. 498. 1801; Fries, Syst. 
Myc. 1: 327. 1821; Elenchus Fung. 1: 63. 1828; Epier. 502. 
1838; Hym. Eur. 593. 1874; Saec. Syll. Fung. 6: 417. 1888; 
Bresadola, Ann. Мус. 1: 83. 1903. 
Xylomyzon rufum Persoon, Мус. Eur. 2: 31. 1825.—X. iso- 
porum Persoon, Мус. Eur. 2: 33. pl. 16. f. 1, 2. 1825. 
Illustrations: Persoon, Мус. Eur. 2: pl. 16. f. 1, 2. 
Type: authentie specimen probably in Persoon Herb. in 
Leiden. 
Fructification resupinate, effused, waxy-soft, the margin 
somewhat naked and colored like the hymenium; hymenium 
п drying fawn-color to earob-brown and Natal- 
0 brown, porose, with the equal, angular pores 
Fig. 23 about 2 to a т. ; in structure about 100-300 д 
В ; thick, with the folds standing out up to 300 д 
Pi егін f >, further, composed of loosely interwoven, hya- 
line hyphae 3-34 д in diameter, not inerusted, 
not nodose-septate, not forming a gelatinous layer; no 
cystidia; spores hyaline, even, slightly curved, 444 14-24 д. 
On decaying pine and frondose wood. Vermont, Illinois, 
and Cuba. Rare. 
Herbarium specimens of Merulius rufus have the color and 
aspect of dried cartilage. The infrequency of specimens of 
this species in herbaria may be due to the specimens having 
been passed by as immature M. tremellosus or M. ambiguus, 
