— 16 — 
verrucis crassis hemisphsrieis v. eylindricis obsito. — Hab. 
in Arenaria serpyllifolia et Mehringia trinervia. 
14. P. Dianthi DBy. P. conferta. Stipites conidiophori 
squaliter v. subinzequaliter 4 —6ies dishotomi ; rami patentes, ultimi 
subulati acuti recti v. deorsum curvali. Conidia late ellipsoidea, 
utrinque rotundato-obtusa, membraha dilute violacea. Oosporarum 
episporium lite fuscum, cristis latis obtusis brevibus flexuosis, 
hine inde irregulariter anastomosantibus et verrucis irregularite 
hemisph:ericis obsitum. In Dianthi proliferi folüs; forma si- 
millima, robustior, oosporis carens, in Agrostemmate Githagine 
frequens est. 
15. P. Holostei Caspary. Stipites conidiophori fasciculati 
(in foliorum pagina inferiore dense cxspitosi), aqualiter aut in- 
zqualiter 6—7ies dichotomi. Hami patentes, ullimi late diver- _ 
gentes subulati acuti reeti v. curvati. Conidia late ellipsoidea, 
utrinque obtusissima, membrana dilutissime violascente. Ödehore 
globos®, episporium obseure luteo-fuscum, tubereulis spinulis 
eristulisque spe connexis densissime obsitum, ideoque spinu- 
loso-scaberrimum. Hab. in Holostei umbellati foliis, caulibus, 
floribus. ' 
$ C. Effuse. Oogonii membrana vix incrassata, maluri- 
tale corrugata, marcescens. Öosporx episporio erasso, crislis 
mean grossis valde irregularibus connexis, oogonii membran& 
inc inde adglutinatis munite, irregulariter angulate. Mycelium 
et haustoria (exceptis duabus ultimis speciebus) divisionis B. 
16. P. effusa (Grev.) Stipites conidiophori faseiculatim e 
stomatibus egredientes (ideoque dense cwspitosi), breves, crassi, 
superne 2—5—6-ies, raro 7-ies dichotomi. Conidia late ellip- 
soidea, utrinque obtusissima, membrana sordide et dilute violacea. 
Oogonia varie magnitudinis; oosporarum episporium kete fuscum. 
«. Major stipitum conidiferorum ramis ultimis crassis, 
breviter subulalis, arcuatim deflexis, conidiis ellipsoideis, con- 
spieue pedicellatis. Hab. in C’henopodio albo, Ch. hybrida, 
Spinacia oleracea. 
ß. Minor ramis multo angustioribus, gracilioribus , inferi- 
oribus erecto-palentibus, ultimis subulatis subsquarrosis rectis 
v. vix curvatis, non dellexis. Conidia globoso-ovoidea, pedi- 
cello vix conspieuo. In Airiplice patula L, A. vulgari, 
Chenopod. polyspermo, Spinacia oleracea, Polygono aviculari. 
17. P. Urtie@ (Lib.). Stipites conidiferi humiles, laxe 
4—6-ies dichotomi; rami Hexuosi, ultimi subulati arcuati saepe 
deflexi. Conidia magna, late ovoidea vel subglobosa, distincte 
pedicellata, apice obtusissima, membrana dilute violascente. 
Vospor® mediocres, episporio sordide fusco. In Urtic® urentis 
L, foliis. 
18. P. Ficarie Tulasne. Stipites conidiophori humiles, 
