Peronosporar"e;i', INTonosporn. 231 



•2. lOlTiiscU. 



15>. Peronospora FicarJae Tul. Compt. rend. 20 Janv. 1S51, F. gri- ^^^ 

 sca Rahenh. Herli. Myc. n. 322, P. nicea (ex parte) Unger l>ot. 

 Zeit. — CfRspitulis sordide alliis vel diluto violaceis, late expait- 

 sis; hyphis coiiidioplioris humilibus, 5-7-ies fcquaiiter vel ina^qua- 

 liter dichotoinis; ramis ultimis vel pcenultimis arcuatim deflexis 

 vel inflexis, ultimis ])lerumque lonpje suhulati.s ; conidiis late elli- 

 psoideis, sordide et dilute violaceis, 20-26:^15-20; oosporis palli- 

 de fnsco-Iutescentihus, epi^^porio crassiusculo levi donatis, 22-'>2 

 ■i. diam.; oogoniis subglobosis, fulvis, 35 y.. diam., sublevibus. 



Hab. ad folia vi va R a n u n c u I i F i c a r i oj, U. li u I b o s i R. 

 lanuginosi, R, repentis, R. acris, R. Flammulfe, R. au- 

 ricomi, R. polyanthemi in Gallia. Germania, Fennia, Relgio, 

 Italia, Bosnia et Lajtponia nec non in America boreali. — Totam 

 plerumque plantam occupat et iihique (radice floribusqiie exceptis) 

 frnctificat. — ((.\n huc Pcronospora M//osii/'/ F^ickel?» 



20. Peronospora arborescens (Rerk.) De l>arv in Rech. sur le dc^v. ssc, 

 Ann. Sc. Xat. 1SCk>, stn-. 1, t, XX, p. 110, Boivj/tis arbovescens 

 Berk. Jour. Hort. Soc. I, pag. 31, t. 4, f. 24. Peronospora Pa- 

 pavcris Tul. Compt, rend. I. c, P. f/risea ,S. minor Casparv in 

 Rabenh. Herb. Myc. od. 2, n. 32;>, Fuckel fung. Rhen. n. 4 et 13. 



— Hyphis (^onidiophoris gracilibus, erectis, superne 7-10-ies di- 

 chotomis ; ramis plus minus flexuosis, squarrosis, patentibus, sen- 

 sim attenuatis, ultimis tenuissimis, hreviter subulatis, plus minus 

 arcuatis; conidiis subglobosis, 15-22^:13-18, vix violaceis; oospo- 

 ris episporio hrunneo, substriato munitis. 



IJab. \\\ pagina inferiore foliorum Papaveris somniferi, 

 P. Rhoiadis, P. Argemonis et P, dubii in Italia, Gallia, An- 

 glia, Belgio et Germania, 



21. Peronospora affinis Rossm. in Rab. Herb. Myc, ed. II, p. 480, De m 

 P)ary in Ann. Sc. Nat. ser. IV, p. 4. — Hvphis conidiophoris validis, 

 regulariter 5-7-ies dicholoniis: ramis patentibus, ultimis brevibus, 

 subulatis, rectis vol deorsum curvatis; conidiis ovoideis, 22-20 :;= 

 15-18 obtusis; zoosporangiis obovoideis, apice obtusissimis, basi 

 acutiusculis, cuticula pallide et sordide violacea ; oosporarum epi- 

 sporio luteo-fusco. 



Hab. in foliis Fumarife officinalis Iiaud frequens in Ita- 

 lia, F'ennia. Germania, P,ritannia et Gallia . 



22. Peronospora Violae Do Bary lioch. sur lo d(''V. in .Vnn. Sc. Nat. 838 



