ini 



I II 



18 



The a|)|)on(liige3 are so uiii(|ii(' iind the forks so conspicuous that 

 \t scionis iiiijiossiltlo a mistake slioiiM lie made in identilication. In 

 sonic instiiiiccs. wlien tlie division is near tlie end, an aiipioacli to 

 Mirrosp/to'ra is apparent, hut the cliaracteristic curve or coil of the 

 tips leaves no I'oom to doulit the proper generic jjosition. 



U. macrosiKH'.i, Peek, Trans. Albany Inst. Vll, p 21'). — 2')tli I?e]). 

 N. Y. Stfite Mus. ]». i)(). 



Ampliigenous. ^lyceliuui conspicuous, abundant. I'eritliecia 

 large, 110-10") //, wall tissue soft, reticulations very small, usually 

 o-lO /,«, and rather ol»scure; ajipendagcs very numerous, oO or more, 

 hyaline, slendiu-, smooth, usually shorter than the diameter of the peri- 

 thecium, tips closely coiled, not enlarged. Asci several. 8-10. Sjjo- 

 ridia 2. large, 20x30-35 /t. 



On UhiniH fnlvd, U. Ami'i'ivniai, C. aldtu, (htrija Vlrghdru. 



Rather couimon east of the liocky Mountains. On the last 

 named host (coUecteii by Tracy in Wisconsin) tiie fungus is undoubt- 

 edly the same as that much more commonly found on elms. 



It diiVers sulliciently IVom Kuropeai< specimens of U. Bivonct', 

 \jv\. on Ll/iiiis caii)p('sfr/',s (Tliiim. Mycoth. I'lsiver. No. 75.5). In 

 these latter the ])eritliccia are sniallci- (N(M)O //), and tlic reticulaticms 

 are mucli larger (10-15 //), and moie distinct. 'J'he fewer (less than 

 20) a)»])endages are stouter, somewhat roughened and conspicuously 

 swollen at tlieii- tips. The usually Ibui- asci each contain two sporidia 

 al)out 30 ft long but narrower than in U. iixicrotipom. 



U. hif(')'?ii<'<Ji(i, |}. tt C. apjiears from descri])tion to be the same 

 as U. 7/iacrospont. 



U. pai'vuia, C. & P. Krysiphei of the IT. H. .lourn. Bot. 1872. 



Amphigenous. Perithecia usually small, 00-100 //, raicly 135 //, 

 ilelicate, reticulations distinct, small and regular, avei'aging about 10 tt; 

 !i]iiMMidages ()0-100. delicate, slender, iiyaline. c<)nMn<»nly shorter than 

 the diameter of the jierithecium. Asci 5-7, broadly ellijttical. Spo- 

 ridui 5-8, mostly (5, about 20-25 /i long. 



On Celt is ocrident'fl/s. From the Atlantic coast to Washington 

 (t^eymoui-). Not ai)parently abundant, but often collected from widely 

 separated localities. 



Distinct from U. f)oJt/rha't(i, M. & C, on same host. Washington 

 (State) s])ecinu'n.-: have perithecia of larger size than usual, attaining 

 rather more than 125 /i, while 100 /i seems to be about the extreme 

 for eastern specimens. 



U. polycha-ta, (B. & C.) 



l-.iysilthc polychtcta, H. & C. Orev, IV, p. 159. 

 (iiciiinla I.ymUii, ,Speg. Kutijr. Arg. U, p. 17. 

 Plcochicta Ciirtiiii, Sacc. & Spcff. Fung. Arg. II, p. 44. 

 (.'nciiiii/j fio/jr/itr/ti, Rav. K, Car. IV, No. 6S. 



