304 BOTANICAL GAZETTE [JUNE 
On an undetermined species of Mimosaceae, Cardenas, State of 
San Luis Potosi, Oct. 22, 1898, no. 31444. 
This rust has many characters in common with that on Pithecolobium, 
although the hosts do not appear to be closely related. The host is a thorny 
shrub or tree, with evenly twice pinnate leaves; the leaflets oblong, nearly glab- 
rous, entire, about 3 by 7™™. A cupulate gland usually occurs on the main 
rachis at the insertion of each pair of petioles. 
27. Ravenelia Pithecolobii, n. sp——Uredospores in the teleutosori 
elliptical or broadly oval, 15-18 by 24-30, wall golden-yellow, 
medium thick, 2-3, thicker at apex, 3-5“, evenly verrucose, pores 
4-6, equatorial: teleutosori amphigenous, small, round, at first 
bullate, scattered, subepidermal, chestnut-brown; teleutospore-heads 
chestnut-brown, 6-8 cells across, 70-go# in diameter, each spore 
bearing 2-3 slightly curved tubercles, 5-7 long, acute, pale brownish; 
cysts appressed beneath the head, extending from periphery to 
pedicel, united laterally ; pedicel colorless, short, deciduous ; paraphyses 
none.—On Pithecolobium dulce (Roxb.) Benth., Guadalajara, Sept. 
27, 1903, NO. 5051. 
28. RAVENELIA MIMOSAE-SENSITIVAE Henn.—On Mimosa stipt- 
tata Rob., Cuautla, Morelos, Oct. 28, 1903, no. 5228; and Iguala, 
Nov. 4, 1903, no. 5326: M. caerulea Rose, Cuernavaca, Oct. 30, 1903, 
no. 5290: M. Galeottii Benth., Cuernavaca, Oct. 31, 1903, no. 5303: 
M. polyanthoides Rob., Iguala, Nov. 3, 1903, no. 5324: M. albida 
H. & B., Cuernavaca, Sept. 24, 1898, no. 3125, Oct. 29, 1903, nO. 
5265; and Cuautla, Oct. 20, 1903, no. 5213: M. alba floribunda 
Rob., Oaxaca, Nov. 10, 1903, no. 5368; Etzatlan, State of Jalisco, 
Oct. 2, 1903, no. 5086: Mimosa sp., Etla, State of Oaxaca, Nov. 16, 
1903, no. A. 
This species appears to be remarkably uniform on all the hosts so far reported 
for it. Uredo sensitiva Speg. (An. Mus. Nac. Buenos Aires 6: 236. 1899) 1s 
probably a synonym, judging from the description. All the numbers under 
this species were submitted to Dr. B. L. Roprnson of the Gray Herbarium, who 
determined the hosts. 
29. RAVENELIA CASSIAECOLA Atk.—On Cassia sp., Oaxaca, 
Nov. 10, 1903, no. 5359. 
This species has not before been reported from Mexico, having been known 
only from the southeastern United States. 
