Auteuuromyces. 12 
nating teleutospores on bean, pea (Pzsum sativum), and two vetch 
seedlings. Although the teleutospores were germinating very freely, 
yet they produced no result. In 1888 two further series of cultures 
were made with U. fade on bean, pea, Vic¢a sativa, cracca, Lathyrus 
pratensis, and Ervum hirsutum. No zcidiospores were produced 
except upon the bean and the pea. The ecidium on the bean occurs 
on white spots, which are thickened and very conspicuous. On pea 
the spots are pale dirty yellow, and the pseudoperidia few and scattered, 
while on bean they are numerous and crowded together. “There can’ 
be no doubt that U. fabe and ervi are biologically distinct, but the 
1888 cultures show that continued investigation will probably lead to 
further subdivision of the forms now grouped under U. fase. 
De Bary says that in some instances the same mycelium which 
produces the ecidia of U. fade gives rise to a few isolated uredo- 
spores. 
Uromyces orobi. (Pers.) 
cidiospores—Spots scattered or circinate. Pseudoperidia flat or 
slightly prominent, with torn whitish edges. Spores sub- 
globose or polygonal from mutual pressure, orange, echinulate, 
16-27 in diameter. 
Uredospores—Sori small, crowded or scattered, soon naked, elon- 
gated on the stems. Spores subglobose or ovate, echinulate, 
yellowish, 15-28 x 16-22h. 
Teleutospores—Sori roundish or elongate, very dark brown, at first 
covered with epidermis. Spores oblong or subpyriform, api- 
culate above, often obliquely, from a thickening of the 
epispore, dark brown, smooth, 25-40 xX 18-28. Pedicels 
very long, persistent, pale brown. 
Synonyms. 
Uromyces orobi (Pers.). Winter in Rabh., ‘ Krypt. Flor.,” 
vol. i. p. 158, in part. 
ciutium orobi, Pers. Romer, ‘“‘ New Mag.,” vol. i. p. 92. 
icidium orobi, D. C. Cooke, “ Hdbk.,” p. 542; “ Micro, 
Fungi,” 4th edit., p. 197. Berk., ‘‘ Eng. Flor.,” vol. v. p. 378. 
Pucinia fabe. Johnst., ‘ Flor. Berw.,” vol. ii, p. 197. 
Exxsiccats. 
Vize, “ Micro, Fungi Brit.,” p. 327. 
On Lathyrus macrorrhizus (Orobus tuberosus). 
July to October. 
