1893.] NATURAL SCIENCES OF PHILADELPHIA. 441 



Marasmius concinnus E. oc E. 



On dead limb of Euonymus atropwrpureus, Mt. Cuba, Del., Sept. 

 1893. (Commons, No. 2306). 



Minute, about 2 mm. high. Pileus convex, smoky-brown, 1 mm. 

 broad, pruinose. Lamellae not crowded, adnate, pruinose, edges 

 obtuse. Stipe white, arising from a patch of white appressed tomen- 

 tum, pilose- strigose below, attenuated and pruinose- pubescent above. 

 Spores white, globose, 3//, diam. Basidia cylindrical, 12-15x4//. 



Pistillaria bartolomaei E. & E. 



On dead stems of Callirrhoe involucrata, Rockport. Ks., June 17, 

 1893. (Bartholomew, No. 319). 



Gregarious, dull flesh color, short, about 1 mm. high, sub- cylin- 

 drical or compressed, obtusely pointed at the apex, slightly darker 

 below but mostly not narrowed into a stipe. Basidia cylindrical, 

 10-12 x2-2j//. Spores globose 2-3// diam. 



This is an anomalous species, standing ambiguously between Pis- 

 tillaria and Clavaria, its crowded and dwarfish growth reminding one 

 of same resupinate Hydnum, or it might at first sight be taken for a 

 Cyphella. 



" Appears in hot, wet weather, about the middle of June and de- 

 stroys many of the best plants, root and branch." 



Asterostroma bicolor E. & E. 



On rotten wood, Wilmington, Del., Oct. 1893. (Commons, No. 

 2356). 



Effused, immarginate, thin, hymenium dirty white, substratum 

 ferruginous ; stellate hypha?, deep brown, mostly with 3-4 stout 

 (60-100x4-5// at base), radiating spines. Spores globose, hyaline, 

 5-7// diam. 



Differs from A. albido carneum (Schw.) in its ferruginous substratum, 

 coarser stellate hyphae and globose spores. It spreads over the rot- 

 ten wood for some distance, interrupted here and there by the in- 

 equalities of the surface. 



* * PYRENOMYCETES. 



Dimerosporium Galactis E. & E. 



On living leaves of Galax aphylla, Marion, Va., June, 1882. 

 Com. Smith Ely Jelliffe, M. D. 

 29 



