Part 2, 1907] COLEOSPORIACEAE 93 
18. Coleosporium Helianthi (Schw.) Arthur. 
Caeoma (Uredo) Helianthi Schw. Trans. Am. Phil. Soc. II. 4: 291. 1832. 
Coleosporium Viguierae Dietel & Holway, Bot, Gaz. 24: 34. 1897. 
Coleosporium Verbesinae Dietel & Holway, Bot. Gaz. 31: 337. 1901. 
O and I. Pycnia and aecia unknown. 
II. Uredinia hypophyllous, or on some hosts epiphyllous, scattered irregularly, 0.25-0.75 
mm. across, soon naked, golden-yellow fading to white, ruptured epidermis somewhat 
noticeable; urediniospores ellipsoid, 14-20 by 19-27; wall rather thin, 1-1.5, verrucose, 
with small, crowded papillae, somewhat deciduous. 
III. Telia hypophyllous, scattered irregularly, often crowded, 0.5 mm. or less across, 
orange-yellow fading to pale-yellow, pulvinate; teliospores with wall swelling 30-404, 
rounded apical outline of each spore usually quite distinct; contents bright orange-red 
fading to colorless, oblong, or somewhat clavate, 16-22 by 55-70, obtuse and often nar- 
rowed at both ends. 
ON CARDUACESE : 
Coreopsis major Oemlert (Ell.) Britton, Virginia. 
Helianthus decapetalus 1,., Indiana. 
Helianthus doronicoides lam., Ohio. 
Helianthus giganieus I,., Pennsylvania. 
flelianthus sp., Alabama, Arkansas, Illinois. 
Verbesina gigantea Jacq., Guatemala; Jamaica. 
Verbesina montanotfolia Rob. & Greenm., Michoacan. 
Verbesina pinnatifida Cav., Jalisco. 
Verbesina turbacensis H.B.K., Guatemala. 
Verbesina virgata Cav., Mexico (state), Morelos, Oaxaca. 
Viguiera helianthoides H.B.K. (VW. dentata Spreng.), Mexico (state), Puebla. 
TYPE LOCALITY: Bethlehem, Pennsylvania, on Helianthus giganieus. 
DISTRIBUTION : Pennsylvania to Ilinois, southward to Central America. 
ExsiccaTi: Seym. & Earle, Econ _-ungi B22; Rab.-Wint.-Paz. Fungi Eur. 37907, Ellis & Ev. 
N. Am. Fungi 78806. : 
19. Coleosporium Dahliae Arth. Bot. Gaz. 40: 197. 1905. 
O and I. Pyenia and aecia unknown. 
II. Uredinia hypophyllous, irregularly scattered, 0.5 mm. oreless across, soon naked, 
yellow fading to white, ruptured epidermis somewhat conspicuous; urediniospores irregu- 
larly ellipsoid, 16-22 by 24-30; wall rather thin, 24, closely and strongly verrucose, with 
uniform papillae. 
Ill. Telia hypophyllous, irregularly scattered, sometimes confluent, about 0.5 mm. 
across, brilliant orange-yellow fading to pale-yellow; teliospores with wall swelling 10-20 
thick above; contents bright orange-yellow fading to pale greenish-yellow, oblong, 18-21 
by 45-704, rounded at both ends. . 
ON CARDUACEAE: 
Dahlia variabilis (Willd.) Desf., Jalisco. 
TYPE LOCALITY: City park, Guadalajara, Mexico, on Dahlia variabilis, cultivated. 
DISTRIBUTION: Central Mexico. 
20. Coleosporium Terebinthinaceae (Schw.) Arthur. 
Uvedo Terebinthinaceae Schw. Schr. Nat. Ges. Leipzig 1: 70. 1822. 
Caeoma | Uredo) Terebinthinaceae Schw, Trans. Am. Phil. Soc. II. 4: 291. 1832. 
O and I. Pycnia and aecia unknown. 
II. Uredinia hypophyllous, scattered, 0.25-0.5 mm. across, early naked, orange-yellow 
fading to white, ruptured epidermis somewhat noticeable; urediniospores globoid, 16-21 
by 16-27“; wall medium thick, 1.5-2, densely verrucose with low and somewhat decidu- 
ous papillae. 
III. Telia hypophyllous, scattered, 0.5 mm. or less across, orange-yellow fading to pale- 
yellow, slightly elevated; teliospores with wall swelling 20-304 thick above; contents 
orange-yellow fading to colorless, oblong or cylindrical, 17-22 by 48-64, truncate or 
rounded at both ends. 
On CARDUACEAE : 
Parthenium integrifolium L., Virginia. 
Polymnia maculata Cav., Mexico (state). 
