24G PrTonospornceie, Peronospora. 



deis, 24-20 ^; ir;-CO, apice obtusissimo, l)asi obtusa vel acutiuscula, 

 membrana dilute sordideque violacea; oosporis episporio pallide 

 luteo-fusco, cristis tenuibus, acutis, connexis regulariter laxe et 

 grosse reticulato munitis. 



Jlab. \\\ foliis Vicia^ sativa^. \. sepium, V. hirsuta^, V. 

 tetraspe rmse. V. pisiformis, V. Cracca^, V. tenuifo- 

 I i a? , V. V i 1 1 o s ;tj, V. a n g u s t i f o I i a^ , Y. F a b ?e . V. a m e r i- 

 canfc, Pisi sativi, Lathyri pratensis. Orobi nigri, 0. 

 verni, 0. tuberosi in Italia, Hritannia, Germania, Belgio, Gallia, 

 ppnnia et America boreali. — f. Orobi Sacc. Status oogonicus: Pro- 

 iomyces rel/culalus Sacc. Mich. I, p. l?> et Fungi Ital. tab. 102: 

 dense gregarius, plagulas foliorum arescentes occupans pustulasque 

 punctiformes vix elevatas fuscidulas formans; sporaogiis in quaque 

 foliorum cellula singulis, sphipricis, 2o y.. diam. eximie asperato- 

 reticulatis, lutescenti-fuscidulis, monosporis; sporis spha^.roideis. tu- 

 nica crassiuscula, IS-20 y.. diara., syppe 1-2 guttatis ex hyalino di- 

 lutissime fumosis. lu foliis Orobi verni amphigenus. rarissime, 

 Conegliano Italia^ borealis (Spegazzini). 



4. Peronospora Alsinearum Casp. in Berl. Acad. d. Wissensch. 18^5, •** 

 De Bary in ITedwigia 1804, n. 0, p. 135, P. Scleranilii Rab. in Herb. 

 Mjc. I, p. 1471 b, P. conferia Ung. Bot. Zeit. 1847, p. .314 pro 

 parte, P. Lepigoni Fuck. et P. i07neniosa Fuck. Fung. Rhen. — 

 Hyphis conidiophoris validis a^qualiter, raro inTqualiter 4-5-S-ies 

 dichotomis; ramis patentibus, iiltimis subulatis, elongatis, plerum- 

 que arcuatis ; conidiis ollipsoideis utrinque obtusissimis; cuticula 

 plus niinus sordide violacea: oosporis episporio laHe fusco, cristis 

 validis, crassis, numerosis connexi s subregulariter reticulato. 



ffab. in C e r a s t i o v u 1 g a t o, C . g 1 o m e r a t o, C. t r i v i al i . 

 s e m i d e c a n d r 0, C. a r v e n s i , S t e I i a r i a m e d i a, S c I er a n t li o 

 an n uo, Lepigon r u b ro et AIs ine m ed i a in Ifalia, Belgio. 

 Gallia, Germania et in agro Mustialense Fennia'. — Proioniiices 

 Siellaricc Fuck. (En. Nass. p. 1, n. 2, fig. 1) ad oosporas huius 

 speciei trahendus. Specimina in Stellaria, Cerastiis, Spei 

 gula crescentia, sa^pe oosporas ferunt, in ceteris plantis tan- 

 tum cor.idia observantur. — • Forina Sicllariai et Arenaritc co- 

 nidia majora, 22-30 y.. longa, offert ; forma Cerasiiorn?n conidia 

 plerumque minora 15-18 y.. longa et hj-phas conidiophoras inagis 

 divisas gracilioresque. In Cerastiis occurrunt tamen forma; inter- 

 media\ u\n Proi. Siellari<r Fuck. (I. r.) spor.v snnt orbiculata». 



