3o
Peronospora Vincae Schr. in lleclw XIII, p. i 83, Beri, et De Toni in Sacc.
S_, 11 \’ I1, Pai\s I, p. 208 Fischer l^’hycom. p. 467.
Hab. in foliis Vincae minoris in Germania (Specimina non vidi et diagnosim
refero).
Caespituli albi, laxi, effusi : conidiophori plerumque singuli, 5oo a. alti,
basi incrassatuli et usque 17 y. cr., superne 6-7 - ie s ramosi; rami primarii
erecti, demum jacentes, secundarii acutangulo-divergentes, extimi fere rectangulariter
divaricati, recti vel arcuati, 5- i o y. longi; conidia ellipsoidea, hyalina
vel vix brunnea, 24-28» iò - i8 ; oosporae angulatae, perinio brunneolo, 24-
28 y. d.
Peronospora Violae De Bary in ann. Se. Nat. 1862 p. 125, Beri, et De Toni
in Sacc. Syll. VII. pars I, p. 25i. Fischer Phycom, p 461. Peron. effusa var.
Violae Fuck. Symb. Myc, p. 71. Beri, et De Toni 1. c. p. 256.
Hab. in fo liis Violae biflorae, V. Rivinianae, V. tricoloris var. arvensis in
Germania, Britannia, Fennia et Amer. bor. (Tab. XXll, fig. 2. — Ex specim.
Thuemeniano in Herb. Sacc. Specimina fere omnia in Mycothecis edita perscrutavi
sed semper exoleta inveni).
Caespituli densi, pallide violacei ; conidiophori plures fasciculati ciré. 3oo » 8,
superne 4-7- ie s ramosi, rami extimi rectangulariter divaricati, recti vel parum
curvali; conidia ellipsoidea, 22-27 » U - i g ; oosporae parum angulatae, luteo-
brunneae
Peronospora arborescens (Berck.) De Bary in .Vnn. Se. Nat. i 863, p 1 ig,
Beri et De Toni in Sacc. Syll. VII, Pars I, 261 Fischer l ’ hycom. p. 4Ò3.
Botrylis arborescens Berk. Journ. of Hort. Soc. p. 3i tab. IV, fig. 24 et Ann.
Nat, Ilist 2 Ser. VII, p. 100. Peron. Papaveris TiA. Comp. Rend. i 855, p. 26
Peron. grisea C. minor Casp. in Rab. myc. ed. II, n, 323. Pe r. effusa f. Pa-
paveris Fuck. Fungi rhen. n. i 3.
Hab. in fo liis Papaveris somniferi, P. Rhoeadis, P. Argemonis et P. dubii
in Italia, Germania Britannia et Belgio (Tab. XLlll. — Ex specim. a cl. Sacc.
in Mycoth. Ven. sub n. i 338 editis cum aliis comparatis).
Caespituli densi, late effusi, primo albidi, dein griseo-violascentes; conidiophori
5 6 coaliti, 3o o - 85o » 10-12, superne 7- 10- ies ramosi; rami plus minus
flexuosi, squarrosi, patentes, inferi et medii acutangulo divaricati, extimi breves
obtusangulo-vel rectangulariter patentes, subinde subulatim arcuati, raro sub-
forcipati; conidia fere globosa, 20-24* 16-20, hyalina vel sordide pallideque
violascentia, oogonia tunica parum incrassata praedita; oosporae globulosac,
perinio crasso a pcriplasmate sat mutato formato cinctae, 3o - 3q y. d.
Peronospora Lophanlbi Fari. Enum Peron. Un. St. in Bot. Gaz. i883
p 333, Beri et De Toni in Sacc. Syll Vii, Pars. I, p, 25g, Fischer Phycom
p. 284.
3 i
Ilab. in fo liis Lophanthi scrophulariaefolii in America boreali (Tab. XLIV.
— Ex spccim. a cl. Ellis in JV. Am. Fung. sub n. 1488 editis).
Caespituli molles, effusi, griseo-violascentes; maculae in pagina super, foliorum
et demum etiam in pagina inferiore primo lutescentes dein rufo- fuscae;
conidiophori 600-800 * 8-g, superne ò-8- ies ramosi, rami extimi rcclan-
gulariter expansi, ceteri acutangulo divaricati, omnes saepe parum curvali vcl
flexuosi; conidia subsphaeroidea, 22-27 * 18-20, sordide violascentia; oogonia
tunica parum incrassata praedita; oosporae globoso-angulatae perinio a peri-
plasmate sat mutato formato, crasso cinctac, 80-84 ^
Valde a j ìni s Per. arborescenti.
B. Sectio Intermediae
Conidiophori ramis plus minusve curvatis, ultimis difformibus in eodem
conidiophoro, h. c. aut breviter lesiniformibus, divaricatis aut parum recurvis,
Ibrcipatis plerumque longitudine inaequalibus longiori recto vel leniter undulato,
breviori saepe valde curvo.
Peronospora Arthuri Fari, in Bot. Gaz Vili, i 883, p. 3 i 5 Beri, et De Toni
in Sacc. Syll. VII. l’ ars I, p. 248. Fi.schcr Phycom. p. 448.
Ilab. in fo liis Oonotherae biennis in America boreali (Tab. XLV. — Ex
specim. a cl. Trelease lectis et cum originalibus aliisque comp.).
Caespituli densi, late effusi, griseo albescentes; conidiophori 260-290 * 8-10,
superne S-y- ies ramosi, rami omnes plus minusve curvati, extimi rectangulariter
expansi, ceteri acutangulo patentes; conidia ellipsoidea, 20-28= 1Ò-18
violascent i-grisea, oogonia tunica tenui, fugaci praedita. Oosporae subsphae-
roidcae, perinio fere membraceo, crasso cinctae, 40 5o y. d.
See. cl, Farlow perinium (episporium) est breviter obtuseque papillatum,
re vera ego papillas aut verracas minime obscrvavi et tantum perinium vix
rugosulum, inter levia et reticulata fere medium, inveni,
Peronospora Hydronbylli Wai te in Journ. of Myc. VII, p. 107, tab. XMl ,
lig. 17-24, Sacc. Syll. XI, p. 248.
Hab. in fo liis Hydrophylli virginici in Am bor. (Diagnosim refero).
Maculae amphigenae, lutescentes, margine indefinito, 10-20 » 2-4 mm. vcl
• confluendo magnam partem folii occupantes, demum brunneae; conidiophori
pluries ramosi ex icone 5-6 ies ramosi) rami inferi et medii acutangulo-divergentes,
curvi, extimi rectangulariter divaricati, saepe recurvati, conidia
ovoidea, 28-35 » 19-26, (plerumque 3o - 21), oogonia tunica tenui praedita;
oosporae subglobosae, perinio crassitudinc vario, pallide brunneo cinctae, 3g-
45 . d.
Peronospora Potentillae De Bary in Ann. Se. Nat. i 863, p. 124. Beri,
et De Toni in Sacc. Syll. VII, pars 1, p. 253, Fischer Phycom. p, 478. Pero