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76
siculiformia, obovata. Stipites zoosporangiiferi dense
fasci-culati, cylindracei, recti vel curvati, in apicem excurrcntes
simplicem subulatum aut breviter scmel, bis, raro ter
diclio-toinuin, rarissime trifurcatum, caeterum siinplices aut sub
apice ranios gerentes 1—2—3 horizontaliter patentes,
alter-nos vel suboppositos, similiter ae stipes primarius divisos.
Zoosporangia parva, inaeqvalia, plerumqve låte ovoidea vel
ellipsoidea vel globulosa, apice papillani obtusissimam
ge-rentia. — Oogonia sphaeroidea, laevia aut verrucosa,
membrana rigida, diaphana, hyalina vel dilute luteo-fusca, e
stra-tis duobus composita, externo tenui, interno valde crasso
liinc poro tubum foecundantem recipiente perforato.
Oospo-rae sphaeroideae, oogonia plerumqve pro maxima parte
ex-plentes, laeves vel subrugosae, lutescentes, diaphanae.
Syn. 1’eronospora densa De B. Rech, sur le dév. in Ann.
Se. nat. 4:c ser, XX ct in Ilcdw. 1864, N:o 9, p. 133.
Exsicc. Rab. Fung. cur. cd. II, 795. Karst. Fung. Fcnu.
581. Thum. Fung. austr. 113. Myc. univ. 343.
Hab. In caulibus et foliis vivis Rhinanthi minoris in
paroeciis Tammela et Kimito mensibus Julio et Augusto
par-cius a nobis lecta.
Sect. III. Acroblastae. Zoosporangia Candida, apice
papillata, germinando tubum e papilla terminali protrudentia.
5. P. gangliformis (Berk.) De B. Recli. sur le dév.
in Ann. Sc. nat. 4:e sér., XX, p. 104.
Mycelii hyphae validae, nonnunqvam torulosae.
Haus-toria vesiculiformia, obovata vel clavata. Stipites 2—6-ies
dichotomi, nonnunqvam trichotomi, stipite et ramis primariis
gracilibus, superne dilatatis vel inflatis. Dicliotomiae
ulti-mae apice inflatae in vesiculam tympaniformem vel
turbina-tam vel subglobosam e margine et facie superiore processus
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