ON LEGUMINOSZ : 99 
13. Uromyces Orobi Lév. 
Aicidium Orobi Pers. in Rém. Neu. Magazin, i. 92. Cooke, Handb. 
p. 542; Mier. Fung. p. 197. 
Uromyces Orobi Lév. Ann. Sci. Nat. ser. 3, vill. 371, 376. Plowr. Ured. 
p. 121. Sydow, Monogr. ii. 106. Fischer, Ured. Schweiz, p. 69, 
f. 52. 
Spermogones. Hypophyllous, mixed with the ecidia. 
Aicidiospores. Aicidia hypophyllous, on yellowish spots, in 
dense clusters 1—5 mm. long, rarely soli- 
tary, shortly cup-shaped, with whitish revo- 
lute margin; spores densely and minutely 
verruculose, yellowish, 14—21 yp. 
Uredospores. Sori amphigenous, scat- 
tered, minute, punctiform, pulverulent, 
brown; spores globose to ovate, distantly 
echinulate, pale-brown then darker, 20— 
28 x 18—25 pw; epispore 3—4 w thick, with 
three or four germ-pores. ; ; 
ea Sori similar, but darker; i ee 
spores subglobose to ovate, rounded or sub- a 
conical above, and much thickened (7—1]1 y) and darker, smooth, 
brown, 25—35 x 18—28 yu; pedicels persistent, yellowish, thick, 
as much as 100 » long. 
On Orobus tuberosus (Lathyrus montanus = L. macrorrhizus). 
Acidia in May and June; uredo- and teleutospores from June 
onwards. (Fig. 53.) 
Cooke says that the ecidia also occur on the stems. The thicker 
membrane of the uredospores, which is also less strongly echinulate, 
distinguishes them from those of U. Fubae. Jordi made attempts to 
infect various other species of Lathyrus, and also species of Vicia and 
Pisum, from U. Orobi, but in every case without success. 
DistRiBuTion : North-western and Central Europe. 
14. Uromyces Pisi Wint. 
Uredo appendiculata var. Pist Pers. Obs. Myce. i. 17. 
Ascidium Cyparissiae DC. Flor. fr. ii, 240. 
Uromyces Lathyri Fckl. Symb. Myc. p. 62. 
