98 



■ 



Pintpineilifoliae on account of its single bractless flowers, its numer- 

 ous acicular spines, and its small leaves ; but it recedes in its pinna- 

 tifid calyx-lobes. — G, Engelmann. 



New Species of North American Fungi. 



By J. B. Ellis. 



4 



VoLUTELLA DiAPHANA. — Punctiform. miuute, white, substipitate, 

 marginal hairs few, straight, hyaline, septate below and united by a 

 membrane, which forms a receptacle filled with the oblong-elliptical, 



hyaline, 1-2-nucleate spores, .0002' long. 



Very near V. Ilyacinthoriun^ Berk., but apparently distinct. 



On decaying leaves of Or oni iiim aquaticum. October. 



Helicosporium MiCROscopicuM. — Tufted, minute, scarcely vis- 

 ible without a lens. Tufts cinereous-brown, consisting of a prostrate, 

 subhyaline, branching hypha, w^ith erect, faintly septate branches 

 bearing lateral, closely coiled, .0005' in diameter, 12-20-septate, pale 

 brownish spores of about two coils. 



The manner of growth seems to be as follows : The tip of the 

 young erect thread coils upon itself and forms a spore, after which 



the same thread pushes its growth still further, but in a direction a 

 little inclined to that of its former growth, when the tip coils again 

 in a direction opposite to that of the first coil, forming a second spore. 

 Whether this manner of growth is continued further I have not ob- 

 served. 



The spores or conidia soon fall away, and the thread that bore 

 them becomes erect and straight. The mature spores are slightly 

 constricted at the septa. 



On decaying staminate catkins of Alntis^ serrulata^ ^ying on the 

 ground in damp thickets. June. 



ISARiopsis Grayiana. — Appearing like a thin, tufted, brown 

 pubescence. Tufts .005' high, composed of numerous, rather slen- 

 der (.0001' in diameter), closely septate, subnodulose threads, more 

 or less abruptly bent above, and bearing at their tips the small, 

 .0002' — .0003', oblong- elliptical, simple or uniseptate spores. 



Occasionally, some of these spores become more elongated and 2- 

 3-septate. 



On old canes of Riihis villosuSy lying on the ground. West 

 Chester, Pa. 



Zygodesmus RUDis. — Hypha coarse, showing only here and 

 there the zygodesmoid joints : spores, or conidia, subglobose, 

 strongly but rather sparingly echinulate, about .0003' in diameter. 



Forming a thin, light ferruginous stratum on the under side of a 

 charred cedar log. Found also on decaying Rhus venenata. 



Valsa didymospora. — Perlthecia 6 to 10, globose, .013' in di- 

 ameter, circinating on the surface of the inner baVk, and circum- 

 scribed by a black line which penetrates the wood, but not deeply ; 

 ostiola cylindrical, about equal in length to the diameter of the 

 perithecia, converging with their tips united and bent upwards, 

 piercing the epidermis, which is only slightly elevated ; asci clavate- 

 cylindrical, small, .ooi'-.ooi2'x.oooi5'; sporidia minute, .000125' 



