Part 2, 1907] UREDINACEAE 125 
On EBRETIACEAE: 
Cordia cylindrostachya R. & S., Jamaica. 
TYPE LOCALITY: Between Babahoyo and Balsapamba, Ecuador, on Cordia sp. 
DISTRIBUTION: West Indies; also in South America. 
16. BAEODROMUS Arth. Ann. Myc. 3: 19. 1905. 
Cycle of development includes only pycnia and telia, both subepidermal. 
Pycnia deep-seated, somewhat erumpent, flask-shaped, without ostiolar filaments. 
Telia erumpent, definite, round, without peridium. Teliospores catenulate, compacted 
into a mass about as high as broad, one-celled, ellipsoid ; wall brownish, medium thick, 
smooth. ; 
Type species, Bacodromus Holwayi Arth. (on Senecio cinerarioides). 
Teliospores with uniformly thick walls. 
Spores broadly ellipsoid, about 20 by 30#. 1. B, Eupatorii. 
Spores oblong, about 25 by 40. 2. B. Holwayt, 
Teliospores with walls thicker above. 3. B. californicus. 
1. Baeodromus Eupatorii Arthur. 
Dietelia Eupatorii Arth, Bot. Gaz. 40: 197. 1905. 
O. Pycniaamphigenous, numerous, crowded insmall groups, punctiform, golden-yellow, 
rather conspicuous, immersed, subepidermal, flask-shaped, 100-150 broad; ostiolar fila- 
ments 20-35 u long. 
III. Telia hypophyllous and caulicolous, crowded in orbicular groups, 1-2.5mm. across, 
often circinating about the pycnia, on stem causing small swellings up to 1 cm. long, on 
discolored spots, very small, 0.2-0.3 mm. across, round, somewhat waxy; teliospores 
broadly ellipsoid, more or less angular and irregular by pressure, 20-25 by 24-364; wall 
golden-brown, smooth, medium thick, 1.5-2.. 
On CARDUACEAE: 
Eupatorium pazcuarense H.B.K., Mexico (state). 
TYPE LOCALITY: Amecameca, Mexico, on Hupatorium pazcuarense. 
DISTRIBUTION: Southern Mexico. 
2. Baeodromus Holwayi Arth. Ann. Myc. 3: 19. 1905. 
O. Pycnia epiphyllous, in small groups opposite the telia, punctiform, golden-yellow, 
becoming brown, immersed, subepidermal, globose, 100-140 in diameter; ostiolar fila- 
ments 30 long ; pycniospores oblong, about 4 by 5. 
III. Telia hypophyllous, densely crowded in orbicular groups, 3-5 mm. across, golden- 
brown, becoming chestnut-brown, centrifugal in development, round, 0.1 mm. across, rup- 
tured epidermis inconspicuous ; teliospores catenulate, united into a solid mass, 5-8 in a 
series, short-cylindrical or oblong, 20-28 by 30-42; wall smooth, golden-brown, uniformly 
1.5-2.5 # thick. 
ON CARDUACEAE: 
Senecio cinerariotdes H.B.K., Mexico (state). 
TYPE LOCALITY: Nevada de Toluca, Mexico, on Senecio cinerarioides. 
DISTRIBUTION : Known only from the type locality. 
ILLUSTRATION : Arth. doc. cit. f. 1. 
3. Baeodromus californicus Arth. Ann. Mvc. 3: 19. 1905. 
O. Pycnia unknown. 
III. Telia amphigenous and caulicolous, densely crowded in more or less orbicular 
groups, 2~7mm. across, golden-brown becoming cinnamon-brown, centrifugal in develop- 
ment, round, 0.2 mm. across, pulvinate, early naked, ruptured epidermis inconspicuous ; 
teliospores catenulate, united into a solid mass, 4-6 spores ina series, ellipsoid or obovate, 
16-20 by 28-37 # ; wall smooth, pale cinnamon-brown, 2-34, thicker above, 5-8. 
On CARDUACEAE: . 
Senecio Douglasit DC., California. ; : ; ; ; . 
Type LOCALITY: Lytle Creek, San Bernardino Mountains, California, on Sevzecio Douglasit. 
DISTRIBUTION : Southern California. 
ILLUSTRATION: Arth. doc. ctt. f. 2. 
