114 A. »E BAftY. 



ferunt, in caeteris plantis hospitis conidia tantum observavi. Forma Stel- 

 lariœ et Arenariœ conidia majora, 1/45-1/34 millim. longa, offert, forma 

 Cerastiorum (P. (omeniosa Turk.) conidia plerumque minora (1/60- 

 1/65 millim. longa) et stipites conidiophoros magis divisos gracilioresque. 

 Occurrunt tamen in ipsis Cerastiis formée intermediae. Forma Spergulœ 

 conidiorum membranam fere hyalinam et oosporarum episporium saepe 

 densius et irregularius reticulatum prsebet. In forma Lcpigoni (P. Le- 

 pigoni Fuck.), rami conidiophori rigidiores esse soient. P. Scleranthi 

 Rabenh. denique stipites conidiophoros sœpe inœqualiter dichotomos, 

 conidia minora (1/56-1/50 millim. longa) offert, cseterum a reliquis formis 

 non diversa ; semper oosporis carere videtur, quibus de causis pro specie 

 distincta non sumenda. 



13. P. Arenariœ Berk. Botrytis Arenariœ Berkeley, Journ. 

 Hort. Soc. LoncL, I, 31. Tab. 4. Ann. andMag.,\. c. p. 100. 

 (P. Arenariœ Tul., Compt. rend., 1. c.,ad priorem speciem perti- 

 nere videtur.) 



Exs. Fuckel, Fung. rhen., n° 18. 



Stipites conidiophori (saepe solitarii e stomatibus émergentes) 

 graciles, 6-7-ies sequaliter, rarius inaequaliter dichotomi, Rami 

 patentissimi, ultimi tenues acuti subulati recliusculi. Conidia late 

 ellipsoidea, utrinque obtusissima, parva (1/65-1/56 millim. longa), 

 membrana vix violascente. Oosporse globosse, parvse, episporio 

 laete fusco extus verrucis crassis hemisphsericis v. cylindricis 

 obsito. (Tab. XIII, fig. 8, 9.) 



Hab. in Arenaria serpyllifolia et Mœkringia Irinervia, totam plan- 

 tain occupans, conidia prsesertim in foliorum pagina inferiore ferens; 

 oosporas rarissime in Arenariœ foliis, copiose in Mœhringiœ pedicellis 

 et floribus inveni. 



14. P. Dianthi f . 



P. conforta (forma Agrostemmœ Fuckel, Fung. rhen., n° 16). 

 Stipites conidiophori sequaliter v. subinsequaliter 4-6-ies dîcho- 

 tomi ; rami patentes, ultimi subulati acuti reçu" v. deorsum curvati. 

 Conidialate ellipsoidea, utrinque rotundato-obtusa, membrana dilute 

 vioiacea. Oosporarum episporium laete fuscum, cristis latis obtusis 



