79 



Hab. In Viciis, Lathyro pratensi, Ervis et Piso sativo 

 mensibus Augusto et Septembri in Fennia saltem australi 

 passim obvia *). 



8. P. Alsinearum Casp. in Ber. der Berl. Acad. d. 

 Wissensch. 1855. 



Stipites validi, aeqvaliter, raro inaeqvaliter 4 — 5— 8:ies 

 dichotonii; rami patentes, ultimi subulati, elongati, plerum- 

 qve arcuati. Zoosporangia ellipsoidca, utrinqve obtusissima, 

 plus minus sordide violacea. Oosporae cristis validis, cras- 

 sis, numerosis, connexis subregulariter reticulatae, laete fuscae. 



Syn. Peronospora Alsinearum De B. in Hcdw. 1864, N:o 9, 

 p. 135. P. Scleranthi Rab. in Horb. myc. I, 1471 b. 



Exsicc. Rab. Fung. eur. II. 378 et 379. Karst. Fung. 

 Fcnn. 582. 



Hab. In Cerastio vulgato et Sclcranlho annuo in re- 

 gionc Mustialensi et in paroecia Kimitto mense Julio leeta **). 



C. Oogonii membrana vix incrassata, maturitate cor- 

 rugata, marcescens. Oosporae episporio crasso, cristis pau- 

 cis, grossis, valde irregularibus, connexis, oogonii membra- 

 nae hinc inde adglutinatis munitae, irregulariter angulatae. 

 Mycelium et haustoria (exceptis duabus ultimis speciebus) 

 divisionis B. 



9. P. ef f us a (Grev.) Rab. Herb. myc. 1880. 

 Stipites fasciculatim e stomatibus egredientes, breves, 



crassi, superne 2 — 5 — 6-ies, raro 7-ies dichotomi. Rami ul- 

 timi crassi, breviter subulati, arcuatim deflexi. Zoosporan- 

 gia ellipsoidea, conspicue pedicellata, sordide et dilute violacea. 



*) P. calotheca De B. 1. c. in AspervHa odorata, Galio Apa- 

 rine et G. Mollugine nec non P. Myosotidis De B. 1. c. in Myoso- 

 tide strida, M. hispida et Asperugine procumbente inqvirendac sunt. 



**) P. Arenariae (Berk.) De B. 1. c., Arenariam serpyllifoliam et 

 Moehringiam trinervem iufestans, vix dubie in Fennia invenienda est. 



