76 KANSAS Academy of Science. 



17. Peronospora Oxybaphi E. & K., in Journal of Mycology, vol. I, p. 2. [Syll., vol. 

 VII, p. 248, No. 829.] 



Conidia and oospores, on leaves of Nyctagineae May to July; most common 

 in June. 



On Oxybaphus Nyctagineus Sweet. 



1761, May, 1886, Manhattan; 1508, May 28, 1886, Manhattan; 1614, May 23, 1889, 

 Manhattan; 539, May 25, 1885, Manhattan; 1527, May 31, 1884, Zeandale, Riley 

 county; 1562, June 13, 1888, Manhattan; 1619, oospores nearly mature, June 23 and 

 24, 1889, Manhattan; 1620, June 29, 1889, Manhattan; (Exs. N. A. F. No. 1418, June, 

 1884, Manhattan); 1651, July 4, 1889, Zeandale, Riley county. 



The conidia of this species germinate by a lateral tube, which is short, thick, and 

 rarely branched. 



%Leiothecae Schroet., in Cohn. Krypt. Flora, Schles. III., S. 243 ( Parasiticae and 

 Efifusae DeBy.) [Syll., VII, p. 249.] Oospores sub-globose, epispore nearly 

 smooth, sometimes folded. Mycelium mostly as in § Calothecae. 

 A Parasiticae wall of oogonium thick and rigid; oospore with a thin wall. 



18. Peronospora Corydalis DeBary, in Ann. Sci. Nat., Ser. 4, t. XX, p. 107. Hedw. 1864, 

 No. 9. p. 134. [Bot. Gaz., vol. VIII, p. 329; Syll., vol. VII, p. 329, No. 834.] 



Conidia and oospores on leaves, stems, and inflorescence of Fumariaceae, Feb- 

 ruary and April and May; most abundant in April. 



On Corydalis aurea Willd., var. occidentalis Englm. 

 1582, on leaves, Feb. 3, 1889, Manhattan; 1575, on leaves, April 21, 1889, Manhat- 

 tan; 1643, with mature oospores, on leaves and stems, April 22, 1888, Manhattan; 

 (Exs. Kansas Fungi No. 13, with oospores, April, 1888, Manhattan); 1567, on leaves, 

 stems and inflorescence. May 1, 1888, Manhattan; 1568, on leaves and stems. May 2, 

 1888, Manhattan; 517, on leaves. May 10, 1884, Manhattan; 1607, with mature 

 oospores, on leaves and stems. May 14, 1889, Manhattan. 



19. Peronospora parasitica (Pers.) Fries, Summa Veg. Scand., sec. pos., p. 493. 

 BoTKYTis PABASiTiCA Pers. Obs. Mycol. I, p. 96, t. 5, fig. 6. [Bull. Bussey Inst., 

 vol. I, p. 428; Bot. Gaz., vol. VIII, p. 313; Syll., vol. VII, p. 249, No. 830.] 



Conidia and oospores, on leaves, stems and inflorescence of Cruciferae, April 

 to July, and December; most common May. 



On Draba Caroliniana Walt. 

 1561, on leaves, April 1, 1888, Manhattan; 1513, on leaves, April 5, 1888, Manhat- 

 tan; 1554, on leaves, April 22, 1888, Manhattan; 1553, on leaves, stems, and capsules, 

 April 25, 1888, Manhattan; 1543 (coll. Miss May Varney), on stems and leaves. May 

 3, 1889, Manhattan; 1577, on leaves, stems, and capsules. May 9, 1888, Manhattan; 

 1512a, on lower leaves, May 9, 1888, Manhattan (Cystopus candidus No. 1512 also oc- 

 curs on the leaves of the same plants); 511, with immature oospores, on leaves. May 

 10, 1884, Manhattan; 1552, on leaves, stems, and capsules. May 13, 1888, Manhattan. 



On Sisymbrium canesceus Nutt. 

 1533a, on leaves, April 25, 1889, Manhattan (Cystojms candidus No. 1533 also oc- 

 curs on same leaves); M. A. Carleton, No. 66, on leaves and stems, April 28, 1888, 

 Cloud county; M. A. Carleton No. 80, on leaves, stems, and capsules, May 15, 1888, 

 Wichita, Sedgwick county; M. A. Carleton No. 80t>, on stems and inflorescence, May 

 22, 1888, Cloud county; 736, on leaves, stems, and capsules, June 5, 1884, Manhattan; 

 1579, on leaves, December 23, 1888, Manhattan. 



On Lepidium intermedium Gr. 

 1535, on leaves, April 4, 1889, Manhattan; 1519, on leaves, April 5, 1888, Manhat- 



