1920] 
BURT—THELEPHORACEAE OF NORTH AMERICA. XII 105 
pallida in Persoon’s ‘Icones et Descriptiones Fungorum’ already 
cited. Our specimens and that from Bresadola have the 
hymenium distinctly setulose with hair-like cystidia. Some of 
the specimens in Kew Herbarium under the name of Thelephora 
Sowerbeyi have hair-like cystidia, but these organs are few or 
absent in whole sections from other specimens. The original 
specimen of Helvella pannosa from Sowerby in Berkeley Her- 
barium at Kew has hair-like cystidia. I concluded that these 
cystidia are variable in abundance in English specimens and 
that Thelephora Sowerbeyi and Helvella pannosa as represented 
by the specimen from Sowerby should be kept with Thelephora 
pallida. Although the specific name pannosa of Sowerby was 
at first adopted by Fries, this was dropped later when Berkeley 
found this species, as understood by Sowerby, to be based upon 
a mixture of two species which were separated as Thelephora 
Sowerbeyi and T. multizonata; T. pallida has priority over T. 
Sowerbeyi. 
S. pallidum may be distinguished from T. Willeyi forms of 5. 
diaphanum by its occurrence in small concrescent clusters, by 
short villose or tomentose stem, and by thicker pileus with upper 
surface split radially into stiff straight fibrils. 
Specimens examined: 
Austria: G. Bresadola. 
England: from Sowerby, under the name Helvella pannosa (in 
Kew Herb.); Cornwall, C. Rea, 1 (in Mo. Bot. Gard. Herb., 
56241); Hereford, Mrs. Wynne (in Kew Herb., under the 
name Thelephora Sowerbeyi). 
Vermont: Brattleboro, C. C. Frost (in Univ. Vermont Herb.); 
Grand View Mountain, E. A. Burt. 
Connecticut: Waterbury, C. C. Hanmer, 1191. 
North Carolina: Blowing Rock, G. F. Atkinson, comm. by 
Cornell Univ. Herb., 4192. 
16. S. elegans (Meyer) Lloyd, Myc. Writ. 4. Stip. Stereums, 
24. textf.539. 1913. (Not S. elegans of earlier authors.) 
Plate 3, fig. 15. 
Thelephora elegans Meyer, Fl. Essequeboensis, 305. 1818; 
Fries, Syst. Myc. 1: 430. 1821; Epier. 545. 1838. (But here 
abridged in an important respect so that following authors 
modified the description to apply to more common species). 
