LEPIDODERMA 143 



from Utah, in Ellis collection, N. Y. Bot. Gard., belongs here. A col- 

 lection from Washington, which otherwise seems to belong here, has 

 short, irregular, brownish stipes. 



Washington, California, Utah; Sweden, Switzerland. Alpine, and 

 apparently uncommon. 



4. Lepidoderma carestianum Rost. 



Mon. 188. 1875. 

 PI. X, Figs. 217, 218, 219. 



1862. Reticularia carestiana Rabenh., Fung. Eur. Ex. No. 436. Not pub- 

 lished. 



Fructification in the form of flat, pulvinate plasmodiocarps, or 

 rarely sporangiate, the sporangia sessile, ellipsoidal, elongate, irregu- 

 lar, confluent, brown or brownish gray, the peridium covered more or 

 less completely with dull white or yellowish crystal-like scales; colu- 

 mella, where visible, yellowish brown, calcareous; capillitium coarse, 

 rigid, more or less branched and united, or colorless, delicate, forming 

 a definite net; spores distinctly warted, purple, 11-15 ix. Plasmodium 

 black. 



The plasmodial colors of this species and L. chailletii are quoted 

 from Lister with some misgiving, since the other characters of these 

 two species are based upon Meylan's treatment, which seems more in 

 accord with the material available for study. The difference in spore- 

 size between the two species is not distinctive, since the ranges over- 

 lap, but in general, the sporangiate forms have small spores and the 

 plasmodiocarpous forms large spores, while the average spore-size of 

 L. granuliferum is well beyond either. Amaurochcete minor Sacc. & Ell., 

 cited by Lister as a synonym of the present species, is represented in 

 the Ellis collection at the New York Botanical Garden by two collec- 

 tions made by Harkness in Utah. The spores range from 15-18 ix in 

 diameter, averaging 16.3 /j.. In this and in other respects, the material 

 agrees with L. granuliferum as here understood. 



New Hampshire, Washington, California; Europe. 



Lepidoderma mandshurica Skvortz. (Phil. Jour. Sc. 46 : 88, 1931) is 

 described as follows: "Sporangia forming short, subglobose or elon- 

 gate pulvinate plasmodiocarps, 0.5 mm. to 5 cm. long, 0.5 to 5 mm. 

 broad, silvery gray, clothed with brilliant brownish threads, branched 

 and anastomosing. Spores brown-violet, smooth, 6.8 to 7.2 /x." The 

 illustrations show a flattened, pulvinate, circular to irregularly ex- 

 panded fructification. Apparently differing from L. carestianum Rost. 

 mainly in the gray color and the much smaller spores. 



