136 NORTH AMERICAN FLORA [VoLUME 7 
11. Ravenelia versatilis (Peck) Dietel, Hedwigia 33: 64. 1894. 
Uromyces versatilis Peck, Bot. Gaz. 7: 56, 1882. 
Uroniyces deciduus Peck, Ann. Rep. N. Y. State Mus. 45: 25. 1893. 
Ravenelia decidua Holway ; Dietel, Hedwigia 33: 370. 1894. 
O. Pycnia unknown. 
Il. Uredinia amphigenous, often forming witches’ brooms, thickly covering large areas, 
sometimes confluent, irregularly orbicular or on the branches oblong, discoid, subcuticular, 
early naked, dark cinnamon-brown, surrounded by a brown marginal stroma, ruptured 
cuticle noticeable; paraphyses very numerous, intermixed with the spores, capitate, 40-60 
long, heads 12-204 broad, wall thin, 1-1.5, often thicker above, 2-5, colored above, 
hyaline below; urediniospores oblong or ovate-oblong, 12-17 by 24-33 ; wall thin, 1-1.54, 
very slightly thicker above, minutely and sparsely echinulate, more prominent below, upper 
half golden-brown, lower half paler, or nearly colorless, pores 8, equidistant in two zones 
of 4 each, one in the equator, the other near the base. 
III. Telia amphigenous, scattered, round or oval, small, 1 mm. or less across, subcu- 
ticular, soon naked, ruptured cuticle noticeable; teliospore-heads chestnut-brown, 5-8 cells 
across, 60-100 in diameter, smooth, or with very faint tubercles on the marginal cells; 
cysts oblong-ovate, 24-30 long, hyaline, peripheral, slow to burst in water; pedicel tinted, 
short, deciduous. 
ON MIMOSACEAE : 
Acacia Greggii A. Gray, Arizona, California, Texas. 
TYPE LOCALITY: Arizona, on Acacia Greggit. 
DISTRIBUTION : Southern border of the United States from Texas to California. 
ILLUSTRATION : Bot. Gaz. 35: pl. 2. f. 3. 
12. Ravenelia expansa Dietel & Holway, Bot. Gaz. 24: 35. 1897. 
O. Pycnia unknown. 
II. Uredinia amphigenous, scattered, round, small, about 0.5 mm. across, subcuticular, 
early naked, pulverulent, cinnamon-brown, ruptured cuticle noticeable ; paraphyses inter- 
mixed with the spores, numerous, clavate, 10-13 by 30-654, smooth, wall of apex much 
thickened, 3-7, wall of sides and stipe rather uniform, 1.5-24, dark golden-brown above, 
paler below ; urediniospores globoid or broadly ellipsoid, 12-18 by 15-20; wall cinnamon- 
brown, thin, about 1, closely and finely echinulate-verrucose, pores 6-10, scattered. 
III. Telia amphigenous, scattered, round or irregular, large, 0.5-2 mm. or more across, 
subcuticular, early naked, dark chesnut-brown, shining, ruptured cuticle conspicuous ; 
paraphyses none; teliospore-heads light chestnut-brown, 5-7 cells across, 65-90 in diameter, 
each spore bearing 3-5 short pale-brown wart-like papillae; cysts pendent from insertion 
of pedicel, globoid or ovoid, swelling in water but slow to burst, 6-8; pedicel hyaline, short. 
ON MIMOSACEAE : 
Acacia tequilana §, Wats., Jalisco. 
TypE LOCALITY : Guadalajara, Mexico, on Acacia tequilana. 
DISTRIBUTION : Known only from the type locality. 
ILLUSTRATION : Bot. Gaz. 35: 1. 2, f. 10. 
13. Ravenelia igualica Arthur, sp. nov. 
O. Pycnia unknown. 
II. Uredinia chiefly hypophyllous, scattered, round, small, 0.2-0.3 mm. across, subcu- 
ticular, soon naked, cinnamon-brown, ruptured cuticle noticeable; paraphyses intermixed 
with the spores, capitate or clavate-capitate, 9-12 by 35-50, smooth, wall of apex thick- 
ened, 3-5, thinner at the sides 1-1.5y, stipe usually solid, golden-brown above, paler 
below; urediniospores globoid or broadly ellipsoid, 14-16 by 16-194; wall pale cinnamon- 
brown, thin, about 1g, finely echinulate-verrucose, pores 8-10, scattered. 
III. Telia chiefly hypophyllous, scattered, irregular, small, 0.3-0.8 mm. across, subcu- 
ticular, early naked, blackish-brown, shining, ruptured cuticle not conspicuous; paraphyses 
none; teliospore-heads chestnut-brown, 4-7 cells across, 60-90 in diameter, each spore bear- 
ing 5-7 short, rounded or slightly pointed, semihyaline tubercles, 2-4» long; cysts pendent 
from beneath the head, hyaline, ovoid or globoid, slow to burst in water; pedicel short, 
hyaline, deciduous. 
