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1917] LONG—RAVENELIA 65 
on the pods of Acacia farnesiana from Mexico, the rust has been collected in 
Texas on the leaves and woody branches of this host and in Hawaii on the 
It was probably introduced into Hawaii on nursery stock which con- 
tained infected woody branches. Apparently Ravenelia siliquae does not have 
a telial stage, since only uredinia have ever been found, although this rust has 
been collected during October, November, January, and February on pods, 
leaves, and woody — and in three countries, namely, United States, 
Mexico, and Hawa 
RAVENELIA AUSTRALIS Diet. and Neg. 
O. Pycnia unknown. 
II. Uredinia amphigenous, very small, punctiform to irregularly 
oval, less than 0.5 mm. across, subepidermal, soon naked, rup- 
tured epidermis inconspicuous; urediniospores obovate, elliptic- 
obovate to subpyriform, light cinnamon brown, 13~20 by 25-32 yu, 
average for 20 spores 16.6 by 28.2y; walls 1.5-2.0p thick, 
slightly or not at all thickened above, concolorous, echinulate, 
germ pores 4—6, equatorial; paraphyses very abundant, incurved, 
dense, encircling the sori, ferruginous, hyphoid, more or less curved 
near apex, 10-17 by 50-67 w, average for 10 paraphyses 12.5 by 
14.4 mu, walls about 2.5 w thick, an occasional paraphysis clavate, 
nearly colorless and with a solid stipe. 
Tlf. Telia amphigenous, punctiform to irregularly oval, less 
than o.5 mm. across, blackish-brown, subepidermal, early naked, 
ruptured epidermis inconspicuous; -paraphyses very — : 
encircling the sori and similar to those found in the u 
teliospore heads chestnut-brown, hemispherical, 67-110 w across, 
average for 20 heads 92.3 u, 7-11 cells across, 18-30 marginal ~ 
ee 22-64 immer ones, 40-94 ‘spores pet head, smooth; cysts 
1, beneath entire head, i Mu, 
