Poroiiosporace.i!, reroiiospora. 249 



li) Leiolhccd' SclirocL (I';irasitic;o et, ofVnsic; Dc njiry). — Oospor;u .siiijf^lo- / 

 bosie, cpisporio plerumqiic siililcvi, h^nlturle ])licatiilo tcctte. Mycelium sai- 

 pius ut iu sect. Calolhecai. 



1 , rariisitic;e. 



M. Peronospora parasitica (Pers.) De IJarv llech. siir le dev. iii Aiiii. ^"^^ 

 Scienc. Nat. 180^. ?>v\\ 1, t. XX, [i. 110, Bolri/lh parasilwa Pers. 

 Obs, I, p. 06, t. :>. r. 0. (\)nla lcon. V. p. 52, t. II, f. IS, /;. ra- 

 mulosa Link Spec. I, p. 5;'), Muxor Boiri/tis et M. I'Jr>/S'/mi (?) 

 SoNverbv l-lngl, Fung, tab, Wo^ et 400, Botri/lis agaricina Johnst. 

 (sec, Casp.), 7>. nir.ea i\Iart. Fl. Erl. Peronospora conferta Ung. 

 Bot, Zeit. 1847, P. parasilica Tiil. Compt. rend. 26 Janv. 1854, 

 r. Dentaria^ liabenh, Fung, Vaw. 86, P. ochrolenca Ces. Rab. 

 Herb. Myc, ed. 2, n, 175, — Hyphis mycelicis crassis, ramosissimis, 

 haustoriis numerosis, ramo.^iis; ramis clavatis, obtusis, crassis, cur- 

 vatis, cellulas planta^ hospita^ sa>pe explentibus; hyphis conidio- 

 phoris crassis, moUibus, flexiiibus, .'equalitpr vel inafiqualiter 5-8- 

 ies dichotomis, rarius trichotomis vel ramos sparsos 1-2 sub apice 

 dichotomo gerentibus; ramis semper repetite bifurcatis; ramis se- 

 cundi et tertii ordinis primariis et stipiti multo angustioribus, su- 

 bulatis, arcuatis; conidiis late ellipsdideis, 20-22 s; 10-20, apice ob- 

 tusissimis, candidis; oogonis angulato-globosis, membrana crassis- 

 sima stratis pluribu.s composita, nitida liyalina vel Havescente 

 pra^ditis; oosporis globosis 2()-l;> y., diam., levibus vel subrugosis, 

 flavescentibus vel fuscescentibus. 



ILab. in folii.s et inHorescentiis, sa^pius socio Cysiopodc can- 

 (lido , C r u c i f e r a r u m pl urimaru m , e, gr, C a p s e 1 1 dp B u r- 

 sa.^ Pastoris, Nasturtii silvestris, N, palustris, Bar- 

 liareie vulgaris, Turritis glabrce, Arabis Gerardi, A. 

 T ]i a 1 i a n .'o, C a r d a m i n e s p a r v i f 1 o r x, C, a m a r lo, C. p r a t e n- 

 s i s , C. h i r s u t ai r h o m b o i d i s, D e n t a r i ii; g 1 a n d u 1 o s a», U . 

 li ulbi fera}, D. heptaphylhc, D.' laciniatie, Hosperidis 

 matronalis, Sisymbrii Alliaria?, S, officinalis, S. So- 

 phia>, Erysimi cheiranthoidis , Cheirantlii Cheiri, 

 Mattliiolfe incana^, M. annua?, Brassicai Napi, 15. olo- 

 r a c e fe, B. s a t i v a3, S i n a p i s a 1 b a), S, a r v e n s i s, A 1 y s s i c a- 

 lycini, Berteroa:; incana;, Erophila) (Drabse) verna^ 

 Carae 1 in a^ m icr ocar pae, C. dentataD, C. sativa^, C. fce- 

 tida}, Tiilaspidis arvensis, Tesdalea> nudicaulis, L e- 

 p i d i i D r a b le, V i r g i n i c i, a f f i n i s, c a m p e s t r i s. r u d e r a 1 i s, 

 N e s I i i\3 p an i c u 1 a t je , D i p 1 o t a x o o s t e n u i f o 1 i ae , B u n i a- 



