1905] ARTHUR—RUSTS FROM MEXICO 3905 
30. Ravenelia inconspicua, n. sp.—Uredosori hypophyllous, 
small, o.5™™ or less across, subcuticular, soon naked, pulverulent, 
ruptured cuticle inconspicuous, paraphyses abundantly intermixed 
with the spores; uredospores globose or broadly elliptical, 15-20 by 
15-22, wall medium thick, 2-2.5, golden-yellow, closely verrucose, 
pores about 10, scattered, paraphyses spatulate, smooth, cinnamon- 
brown, paler below, walls thick, 3-6#: teleutosori hypophyllous, 
very small, scattered, blackish, shining, subcuticular; teleutospore- 
heads chestnut-brown, 6-8 cells across, 60-100 in diameter, each 
cell bearing 4-6 cylindrical tubercles, 3# wide by 5-7» long, slightly 
colored; cysts appressed to the under side of the head, 6-10, some- 
what united to one another; paraphyses none.—On Cassia (or 
Caesalpinia) sp., Zapotlan, State of Jalisco, Oct. 9, 1903, no. 5135- 
31. RAVENELIA SPINULOSA Diet. & Holw.—On Cassia Holwayana 
Rose (C. multiflora Mart. & Gal.), Cuautla, State of Morelos, Oct- 
23, 1903, no. 5226; Oaxaca, Nov. 11, 1903, no. 5390: C. Galeottiana 
Mart., Tehuacan, Nov. 7, 1903, no. 5348: Cassia sp., Oaxaca, 
Noy. 10, 1903, no. 5372; Cuernavaca, Nov. 1, 1903, no. 5310. 
32. Ravenelia pulcherrima, n. sp.—Uredosori amphigenous, in 
loose groups or scattered, round, small, 0.25-0.5™™ across, soon 
naked, subcuticular, cinnamon-brown, paraphyses numerous, inter- 
mixed with the spores; uredospores ellipsoid or oblong-globoid, 
15-18 by 17-24, wall thin, 1.5-2#, pale golden yellow, finely and 
closely echinulate-verrucose, pores 6-8, scattered, paraphyses large, 
capitate or spatulate, 12-18 by 35-55, smooth, walls of the stipe 
thin and nearly colorless, walls of the head much thickened above, 
3-10, chestnut-brown: teleutosori amphigenous, small, scattered 
or confluent, subcuticular, blackish-brown; teleutospore-heads choco- 
late-brown, 6-7 cells across, 75-120 in diameter, each spore bearing 
4-5 inconspicuous papillae, semihyaline, 1-2# high; cysts appressed 
to the underside the head, extending from periphery to pedicel; 
paraphyses none; pedicel short, colorless, deciduous.—On Poinciana 
pulcherrima L. (Caesalpinia pulcherrima Sw.), Yautepec, State of 
Morelos, Oct. 24, 1903, no. 5236 (type); Iguala, State of Guerrero, 
Noy. 4, 1903, no. 
33. RAVENELIA LAEVIS Diet. & Holw.—Or Indigojera jaliscen- 
sis Rose, Chapala, Oct. 5, 1903, no. 5108: I. densiflora Mart. & Gal., 
