Arthur; Uredinales of Porto Rico 
183 
In Mayor’s work on the Colombian rusts this species is recorded 
from Jamaica on Commelina nudiflora and Tradescantia multi- 
flora. It is doubtless a common rust throughout the tropical 
world, but too inconspicuous to be often collected. 
The single collection of this species by Stevens shows only 
uredinia, as has been the case with most other collections. The 
type collection for Cooke’s name, which has been examined 
through the kindness of the Director of the Kew Gardens, shows 
both telia and uredinia. This collection came from Socotra, an 
island at the mouth of the Gulf of Aden. Other collections with 
both telia and uredinia have been examined from the eastern 
border of Africa along the coast of the Red Sea, and also a col- • 
lection from the Malabar Coast of western India. No telia are 
known on any collection from the western hemisphere; and no 
pycnia or aecia from any part of the world have been associated 
with the species. It was placed in Nigredo on the assumption 
that the morphological and host characters warranted the belief 
in pycnia and aecia of a certain form to complete the life cycle. 
22. Uromyces Caesalpiniae (Arth.) comb. nov. 
Ravenelia Caesalpiniae Arth. Bull. Torrey Club 31 ; 5 - I 904 - 
On Mimosaceae: 
Mimosa ceratonia L., Bayamon, Feb. 19, O, II, III, jpj, 
March 2, ^08 bis, May 21, 1868; Vega Baja, March 2, 
5 o 5, May 21, ip2p, Nov. 5, 4264; Monte Alegrillo, June 
20, ; St. Catalina, Aug. 28, 2725; Cabo Rajo, July 
28, 316^] Indiera Fria, Maricao, 3454-, Abonita, Nov. 3, 
4020 ] Vega Alta, November, 4133; San Sebastian, Nov. 
22, 4310; Lares, Nov. 22, 4830 ] Manati, 3306; Luguillo 
forest, Dec. 2, 3432 ; San German, Dec. 8, 3764 ; El 
Gigante near Ad juntas, Dec. 15, 5P/o; Preston’s ranch 
near Naguabo, Dec. 31, 6637. 
The type material of Ravenelia Caesalpiniae Arth., now in the 
Arthur Herbarium, was’ scanty, consisting of two compound 
leaves, bearing together twelve leaflets, moderately supplied with 
pycnia and uredinia, but no telia. The collection was made near 
Bayamon, P. R., in 1901, by L. M. Underwood and R. F. Griggs, 
