Parr 2, 1907] AECIDIACEAE 135 
ON MIMOSACEAE : 
Calliandra grandifiora Benth., Jalisco. 
TYPE LOCALITY: Mountains near Chapala, Jalisco, Mexico, on Calliandra grandifiora. 
DISTRIBUTION : Known only from the type locality. 
ILLUSTRATION : Bot. Gaz. 35: pi. 3, f. 25. 
8. Ravenelia gracilis Arth. Bot. Gaz. 39: 393. 1905. 
O. Pycnia amphigenous, crowded in small groups, punctiform, prominent, fuscous, sub- 
cuticular, hemispherical, 60-100 » broad, and half as high. 
II. Uredinia epiphyllous, scattered, small, less than 0.25 mm. in diameter, round, 
mammillose, subepidermal, dehiscent by central, irregular rupture, the encircling epi- 
dermis forming an aecidioid cup; paraphyses numerous, intermixed with the spores, or 
more often only peripheral, cylindrical, 7-10 by 40-60, somewhat contorted, walls 
smooth, thin, nearly or quite colorless; urediniospores elliptical or obovate-oblong, 16-21 
by 30-40 #; wall rather thin, 1.5-2.5, golden-brown, strongly and evenly echinulate, pores 
4-6, equatorial. 
Ill. Telia epiphyllous, scattered, small, resembling the uredinia but without para- 
physes, subepidermal ; teliospore-heads chestnut-brown, 5-7 cells across, 75-100 in diam- 
eter, each spore bearing 4-7 slender, nearly colorless tubercles, 3-4 v high; cysts delicate, 
appressed beneath the head, extending from periphery to pedicel, united laterally; pedicel 
short, colorless, deciduous. 
ON MIMOSACEAE : 
Gen. et sp. indet., San Luis Potosi. 
TYPE LOCALITY: Cardenos, Mexico, on unknown host. 
DISTRIBUTION : Known only from the type locality. 
9. Ravenelia siliquae Long, Bot. Gaz. 35: 118. 1903. 
O. Pycnia unknown. : 
II. Uredinia fruticolous, round, large, 1-4 mm. across, scattered, often confluent, 
subcuticular, early naked, pulverulent, cinnamon-brown, ruptured cuticle conspicuous ; 
paraphyses few, intermixed with the urediniospores, small and inconspicuous, clavate, 
6-7 by 40-45 w, wall thin, 1y,-thicker at apex, 1-24, colorless below, pale golden-yellow 
above; urediniospores oblong to obovate-fusiform, 11-15 by 20-334; wall light cinnamon- 
brown, medium thin, 1.5-24, densely and strongly verrucose, pores 8, in two irregular 
transverse zones, equidistant from equator. : 
IIt. Telia unknown. 
ON MIMOSACEAE : : 
Vachellia Farnesiana (L.) W. & A. (Acacia Farnesiana Willd.), Jalisco, Oaxaca. 
TYPE LOCALITY: Etla, Oaxaca, Mexico, on Acacia Farnesiana, 
DISTRIBUTION : Southern Mexico. 
ILLUSTRATION : Bot. Gaz. 35: pl. 2, f. 7. 
10. Ravenelia Acaciae-pennatulae Dietel, Beih. Bot. Centr. 20°: 373. 1906. 
O. Pycnia unknown. 
II. Uredinia epiphyllous, scattered, round, small, 0.2-0.4 mm. across, subcuticular, 
early naked, cinnamon-brown, pulverulent, ruptured cuticle conspicuous; paraphyses 
thickly intermixed with the spores, small and inconspicuous, clavate, 9-15 by 40-50 u, stipe 
slender, wall thin, 1, slightly thicker at apex, 1-24, pale golden-yellow above, colorless 
below; urediniospores ellipsoid or broadly oblong, 15-22 by 20-33 4; wall dark cinnamon- 
brown, medium thick, 1.5-2.5 4, densely and strongly verrucose, pores 8, in two irregular 
transverse zones of four each, equidistant from equator. 
III. Telia epiphyllous, scattered, round or irregular, small, 0.3-0.5 mm. across, sub- 
cuticular, early naked, blackish-brown, shining, ruptured cuticle noticeable; paraphyses 
none; teliospore-heads chestnut-brown, 5-7 cells across, 60-100 in diameter, each spore 
set with 7-9 short, semihyaline papillae, 1-2” long; cysts pendent beneath entire head, 
hyaline, swelling and bursting readily in water ; pedicel short, hyaline, deciduous. 
ACEAE: 
Meee cochliacantha Humb. & Bonpl., Guerrero, Puebla. 
Acacia pennatula Benth., Oaxaca. . . 
TYPE LOCALITY: Etla, State of Oaxaca, Mexico, on Acacia pennatula. 
DISTRIBUTION: Southern Mexico. 
