TWENTY-FIRST ANNUAL MEETING. 79 



b Effusae, wall of oogonium thin, wrinkled at maturity; exospore thin, usually, 

 with a few irregular folds. 



22. PeronosporaTrifoliorum DeBary, in Ann. Sci. Nat., ser. 4, t. XX, p. 117. Hedw., 1864, 

 No. 9, p. 137. [Bot. Gaz., vol. VIII, p. 329; Syll., VII, p. 252, No. 841.] 



Conidia and oospores on leaves of Leguminosae Papilionaceae May and June. 



On Astragalus Canadensis L. 



1624, with abundant nearly mature oospores. May 18, 1886, Manhattan; 1625, 

 June 20, 1884, Manhattan. 



On Astragalus lotiflorus Hook. 



1606, June 18, 1888, Manhattan; 1628, June 29, 1889, Manhattan; 937, June 30, 

 1887, Manhattan; 1787, August 18, 1889, Manhattan. 



It may be that the form on Astragalus lofijlorus is not the same as on A. Cana- 

 densis, as no oospores were found on the former. The conidiophores and conidia, 

 however, appear identical in both. 



The oospores are quite different from those of P.Viciae, being almost smooth. 



23. Peronospora leptosperma DeBary, in Ann. Sci. Nat., ser. 4, t. XX, p. 121. Hedw. 

 1864, No. 9, p. 139. [Bot. Gaz., vol. VIII, p. 331; Syll., vol. VII, p. 254, No. 847.] 



Conidia and oospores on leaves of Compositae Tubuliflorae June and July. 



On Artemisia Ludoviciana Nutt. 

 750, June 2, 1885, Manhattan; 1586, with a few nearly mature oospores, June 9, 

 1889, Manhattan; 1644, June 20, 1888, Manhattan; 1659, July 6, 1889, Manhattan. 



24. Peronospora alta Fuckel. FungiRhenani Exs., No. 39; Symb. Myc, p. 71. [Bot. 

 Gaz., vol. VIII, p. 328; Syll., vol. VII, p. 262, No. 879.] 



Conidia and oospores on leaves of Plantagineae May and June. 



On Plantago major L. 

 1578, May 14, 1887, Manhattan; 1523, May 22, 1886, Manhattan; 756, May 25, 1885. 

 Manhattan; 1590, June 9, 1889, Manhattan; 1597, June 18, 1889, Manhattan; 1640, 

 with nearly mature oospores, July 2, 1889, Manhattan. 



25. Peronospora Candida Fuckel, Fungi Rhenani Exs., No. 38 (1363) ; Symb. Myc, p. 71. 

 Peeonospoka Anagallidis Schroeter, in Rabenh. F. Eu., No. 1744 (1874); Hed- 

 wigia 1874, p. 45. Peeonospoka Andbosaces Niessl, in Rabenh. F. Eu., No. 1875 

 (1874). [Syll., vol. VII, p. 248 No. 828, p. 258 No. 860, p. 260 No. 869.] 



Conidia and oospores on leaves of Primulaceae March to June; most common 

 April and May. 



On Androsace occidentalis Ph. 



1572, on leaves of very young seedlings, March 24, 1889, Manhattan; 1649, on 

 seedlings, March 31, 1889, Manhattan; 1664, with abundant nearly mature oospores, 

 April 6, 1889, Manhattan; 1557, with oospores, April 16, 1888, Manhattan; 1555, with 

 mature oospores, April 22, 1888, Manhattan; (Kansas Fungi No. 41), 1555; 1556, with 

 very abundant mature oospores, June 22, 1888, Manhattan; 1573, on very small seed- 

 lings, December 24, 1888, Manhattan. 



This abundant Kansas species seems to be the same as Fuckel's P. Candida, 

 though I have no authentic specimens of it for comparison. It is, according to 

 specimens in F. Eu., the same as P. Anagallidis Schroeter, of which Schroeter him- 

 self, in Just's Bot. Jahresb., 2 Jahrg. (1874), p. 209, says "wohl identisch mit Per, 

 cand. Fuckel." It is the same as P. Candida Fuckel in Roum. F. Sel. Exs., No. 4858, 

 which is on Anagallis coerulea, and is evidently the same as P. Anagallidis, Schroe- 

 ter. It also agrees fairly well with W. G. Smith's figure of P. Candida in The Gar- 



