Nov. 1905 ] Notes on Species of Ravenelia 
235 
This species differs from R. uleana in all its gross characters 
and in its short deciduous pedicel. 
Ravenelia australis. Sori sub-epidermal, epiphyllous; II sori 
not present; II spores intermixed with III spores; II spores 
faintly echinulate to smooth, walls uniform, elliptic to slightly 
fusiform, fulvous, germ pores four, equatorial, large, 
10-16 x 27-32 fx, paraphyses sparingly present, clavate to sub-cap¬ 
itate, fulvous, darker at apex, 30-40 jw, long, heads 10-15 ju, thick, 
base of stipe hyaline. Ill sori scattered, epiphyllous, black brown, 
orbicular, small, naked or rarely surrounded by the ruptured epi¬ 
dermis, from 3 to many heads in a sorus. Ill heads chestnut 
brown to black brown, smooth pulvinate, 6-8 cells across, 70-100 /*, 
cysts appressed coherent, peripheral, hyaline; pedicel compound, 
hyaline, short, deciduous, cysts bursting very easily in water. 
On Leucaena microphylla Igualla Mex., Nov. 2, 1903, No. 
5314 of E. W. D. Holway. 
This species was reported by Dr. J. C. Arthur as R. verru¬ 
cosa in his “Leguminous Rusts from Mexico,” Bot. Gazette 
39:392, June, 1905. There are two points of difference in this 
and in the description of R. australis as originally published, viz., 
the cysts are reported as many and pedicel not compound. If this 
is correct then the Mexican plant here described is not R. australis 
but is a new species. The other characters coincide so fully that 
the writer has placed it as R. australis in spite of the differences 
noted. 
Ravenelia mexicana Transz. was collected by Pringle, Sept. 
12, 1889, in Mexico on Calliandra grandiflora, and has not since 
been reported, notwithstanding the many collections of Mexican 
species by Mr. Holway; that the plant was not rediscovered 
seemed strange, so a careful study of the Mexican species was 
made, with the result that the writer is fully convinced that R. 
mexicana Transcz. and R. mimosae-sensitivae P. Henn. are the 
same species. A careful comparison of the types of the two; spe¬ 
cies, with subsequent collection of one of them, was made, and the 
above opinion confirmed. The II heads of both plants have one 
very marked character, viz., the papillae on the heads are longer 
and more prominent around and near the base of the head than 
those at the top, being often reduced at top to warts. This is an 
unusual character and determined the identity of the two plants. 
No II spores of R mexicana were seen, but the described shape 
and size agrees with those given for R. mimosae-sensitivae; also 
the recently described species, R. mconspicua Arthur, is the same 
plant as R. mimosae-sensitivae, with slightly smaller uredospores 
