12 PerisporiacesD, Erysiphea), Microsphfera. 



Hab. '\\\ foliis Cephalau thi in Carolina sup. — Mycelium 

 evanescens; appondices ter furcatfu, perithecio duplo longiores. 



8. Microsphaera Grossulariae Lov. Disp. Erys. in Ann. Sc. Nat. 1851. ^o 

 XV. p. IGO, t. 9, fig. :i5. Er. penicillata imr. Grossularice Link. — 

 Amphigena; peritheciis minutis, globulosis, sparsis gregariisque, 

 mycelio arachnoideo insidentibus; appendicibus 10-15, peritliecia 

 aequantibus, vage dichotomis, ramulis ultimis bidentatis ; ascis 

 4-8, ovoideis, 4-5-sporis. 



Hab. in Gallia, AngUa, Germania, Amer. bor., Sibiria asiatica, 

 in foliis Ribis Grossularia? (et Sambuci canad. t. Berk). 



0. Microsphaera Astragali (DC.) Trev. Alphitomorpha holosericea 4i 

 Wallr. (1819) Erjsiphe Astragali DC. (1815) Micr. holosericea 

 (Wallr.) Lev. Ann. Sc. nat. 1851, p. 159, t. 9, fig. 27. — Myce- 

 lio arachnoideo fugaci; peritheciis minutis, sparsis v. gregariis, 

 globulosis; appendicibus 12-16 perithecio sextuplo longioribus, 

 simplicibus bifidisve; ascis suboctonis, 4-6-sporis. 



Hah. in Gallia, Belgio, Italia, Germania, America bor. in foliis 

 Astragali Glycyphylli et Cooperi, Autumno. — Ob ap- 

 pendices non definite dichotomas an potius ex: Erysiphes genere'? 



10. Microsphaera tlifl\jsa C. et Peck 25 Rep. p. 95. — Mycelio tenui 42 

 evanescente; peritheciis minutis, globulosis, nigris; appendiculis co- 

 piosis (18-25) perithecium ^equantibus v. duplo longioribus, hya- 

 linis, interdum vage ramosis apiceque nodulosis; ascis 4-6, ova- 

 tis 4-6-sporis. 



Ilab. Amer. bor., Albauy, in foliis Desmodii canadensis 

 plerumque epiphylla. 



11. Microsphaera Russellii Clint., Peck 26 Rep. 80. — Amphigena; ^^ 

 raycelio arachnoideo, evanescente; appendicibus 8-18, longissimis, 

 flexuosis, coloratis, versus apicem simplicem aut bis terve divisum 

 rectiusculum dilutioribus; ascis ovatis, 4-8; sporidiis 4-6 ellipsoi- 

 deis 17-20:^10. 



Hab. in Amer. bor. Buff^alo, North Greenbush, in foliis et pe- 

 tiolis Oxalidis strictae. u Appendices peritliecium sextuplo 

 superantes; asci 46-48 a. diani.)). 



12. Microsphaera pulchra C. et Peck 25 Rep. p. 95. — Amphigena; ^^ 

 mycelio teiiui persistente; peritheciis numerosis, globosis, nigris ; 

 appendiculis octo-duodecim, fere perithecium a^quantibus, hyalinis 

 «apice pluries refracto-dichotomis, apicibus obtuse bidentatis ; 

 ascis 4-5; spoi-idiis 4-6, 18-20 c; 8-10 >). 



Hab. in Amer. boreal, Greenbush, in foliis Corni aiterni- 



