Perisporiaceae, Erysiphese, Pliyllactinia. 5 



in foliis Tanaceti in Vogesis (Mougeot, t. Fries). — Specimina 

 Mougeotiana pertinerent sec. Leveille ad Phyllactiniam , quod 

 vere improbabile videtur. 

 7. SphaBrotheca Mors-uvae (Schw.) Berk. et Curt. in Grev. IV. p. 158. 12 

 Thuem. F. pomic. 92. Erysiphe Mors-uvce Schv/. — Mycelio 

 denso, crassiusculo, margine albo, centro fusco-brunneo ; peri- 

 theciis minutis, crebris, sparsis, atris, applanato-globosis, rugu- 

 losis, e mjcelio denique emergentibus (Schw); sporidiis 15 a. 

 long. sec. B. et C. 1. c. 



Hab. in Amer. bor. Pensylvania (Schw.) et Carolina sup. (Cur- 

 Tis) in baccis Ribis Uvae crispae. 



b) Perithecia polyasca. 



PHYLLACTINIA Lev. in Ann. Sc. nat. 1851, p. U4. {Eiym. phyllon, 

 folium et actiti radius). — Perithecia globoso-depressa, polyasca, 

 majuscula, appendiculata, mycelio arachnoideo [Oidii) insidentia. 

 Appendices aciculares, rectfe, radiantes basi vesiculoso-inflat^e. 

 Asci 2-4-spori. — Sec. Tulasne pycnidia adsunt peritheciis asco- 

 phoris similia sed stylosporas fascidulas ovoideas foventia. 



1. Phyllactinla sufftjjta (Reb.) Sacc. Mich. II., p. 50. Ph. guitata is 

 (Wallr.) Lev. in Anu. Sc. nat. 1851, tom. XV, p. 144, t. 7, f. 11. 

 — Amphigena sed stepius hypophylla; mycelio arachnoideo ple- 

 rumque evanido; peritheciis sparsis hemisphaericis, demum de- 

 pressis, magnis; appendicibus hyaliuis, simplicibus; ascis in sin- 

 gulo perithecio 4-20, breviter pedicellatis 2-4-sporis. 



Hab. ad folia viva Alni, Crataegi, Pyri, Mespili, Loni- 

 cerae, Fagi, Coryli, Quercus, Carpini, Betula^, Fra- 

 xini, Catalpae, Corni, Celastri etc. iu tota fere Europa, 

 Sibiria asiatica, America boreali, per «statem et autumnum. 



Obs. Speciei synonymia, quam extricare conatus sum, sequens 

 est: Sclerotiurn Erysiphe ;S corylea Pers. (1801), Scl. (Erysibe) 

 suffulta Rebent. (1804), E. Coryli DC. (1805), E. vagans Biv. 

 Bernh. (1815), E. pachypus Martius (1817), Alphitornorpha gut- 

 iata Wallr. (1819). Ex quo patet noraen Rebentischii esse jure 

 prioritatis prajferendum. Observandum quod Mucor Erysiphe Lin- 

 uaei et Scleroiium Erisiphe Pers. onines pene Erysiphaceas com- 

 plectantur. 



2. Phyllactinia Candoilei Lev. Disp. meth. Erys. p. 42. — Hypo- 14 

 phylla; myceho tenui evanido; peritheciis sparsis, magnis; ascis 



8, tetrasporis. 



