1905] THAXTER—NEW SPECIES OF WYNNEA 247 
involute on drying, the external surface rich blackish-brown, finely 
verruculose, the roughness due to projecting groups of irregular 
parenchyma-like cells becoming somewhat hair or chain-like toward 
the margins. Hymenium even, dark dull purplish-red, or brown. 
Asci elongate, about 500-540 u long, the sporiferous part cylindrical, 
about 18 # in diameter. Paraphyses septate, simple or irregularly 
branched, clavate, the slightly brownish terminal enlargement more 
abruptly and conspicuously distinguished in older specimens. Spores 
eight, subcymbiform, 32-40 X 15-16 #, the extremities apiculate or 
papillate; marked when mature by about eight roughened areas 
running longitudinally and separated by a corresponding number 
of smooth slightly depressed areas, the spore when fresh completely 
filled by numerous small round refractive oily masses. 
Growing on the ground in rich woods, Burbank, East Tennessee, and Cran- 
berry, North Carolina. 
Professor DuRAND has kindly allowed me to examine a specimen 
collected by E. WitxKrnson at Mansfield, Ohio, and communicated 
by Professor KELLERMAN, which corresponds in all respects with 
the Carolina plant. The spores of BERKELEY’s species differ in 
shape and in their smaller size; those of W. gigantea measuring 
25-30 X12 m, and those of W. macrotis received from Mr. MASSEE 
20-25 X 11-12 #. Theapothecia of W. gigantea seem also to be some- 
what smaller, more rounded distally, more numerous in a single 
plant, and distinguished by their much paler color. . 
HARVARD UNIVERSITY. 
EXPLANATION OF PLATES IV AND V. 
Fics. 1-6.—Wynnea americana Thaxter. 
1G. 1. General habit of a well-developed plant. For the original of this 
- figure, done in color by Mr. Krrecer from a formalin specimen and colored 
sketches of my own from fresh material, I am indebted to Professor FARLOW. 
Fic. 2. Paraphyses. 
1G. 3. An ascus showing connection with subhymenial filament. 
Fic. 4. Three spores, the upper in optical section. 
Fic. 5. Portion of a section of the subterranean sclerotium showing chambers 
and cortex. Leitz obj. C+oc. 1. | 
Fic. 6. Portion of walls between two chambers. Leitz obj. 1+0¢. 1. 
1G. 7. W. macrotis Berk. Three spores, two in optical section. 
Fic. 8. W. gigantea Berk. & Curt. Three spores, one in optical section. 
The spores were drawn with Zeiss apochr. 1.25™™ and 4 ocular. 
