86 NORTH AMERICAN FLORA [VOLUME 7 
Uredinia small; urediniospores thin-walled. 
Teliospores oblong. 22. C. paraphysatum. 
Teliospores oblong-clavate. 23. C. occidentale. 
Teliospores clavate. 24. C. Senecionis. 
1. Coleosporium Bletiae Dietel, Hedwigia 37: 216. 1898. 
O and I. Pycnia and aecia unknown. 
Il. Uredinia hypophyllous, irregularly scattered, small, 0.3 mm. across, early naked, 
yellow fading to white, ruptured epidermis noticeable; urediniospores ellipsoid or globoid, 
14-20 by 20-252; wall thin, 1-1.5 4, finely but conspicuously verrucose with crowded 
papillae. ‘ 
Ill. Telia hypophyllous, irregularly scattered, somewhat confluent, often crowded in 
annular groups about the uredinia, 0.3-0.5 mm. across, slightly elevated, orange-yellow 
fading to pale dull-yellow; teliospores with wall swelling 15-20 thick above; contents 
orange-yellow fading to colorless, terete or somewhat clavate, 16-20 by 58-77 u, truncate or 
rounded at each end. 
ON ORCHIDACEAE : 
Phajus Wallichti Lindl. (P. grandiflorus Reichb.), California. 
TYPE LOCALITY : Tokio, Japan, on Bletia hyacinthina. 
DISTRIBUTION : Central California on plants imported from Japan ; also in Japan. 
EXSsIccaTi: Sydow, Ured. 1232, 
2. Coleosporium ribicola (C. & E.) Arthur. 
Uredo ribicola C. & HE. Grevillea 6: 86. 1878. 
Uredo Jonesti Peck, Bull. Torrey Club 12: 36. 1885. 
O and I. Pyenia and aecia unknown. 
II. Uredinia hypophyllous, scattered or in small open groups on conspicuous yellow 
spots, 0.5 mm. across, tardily naked, reddish orange-yellow fading to pale-yellow, becoming 
pulverulent; urediniospores broadly oval, or globoid, 20-27 by 26-30; wall thick, 3-5 4, 
densely verrucose with slender cylindrical tubercles. 
III. Telia hypophyllous, resembling the uredinia, scattered or in small open groups on 
conspicuous yellow spots, 0.5 mm. across, reddish orange-yellow fading to pale-yellow; 
teliospores with wall swelling 15-25 above; contents orange-yellow fading to pale-yellow, 
terete, 17-22 by 48-60, rounded or acute at both ends. 
ON GROSSULARIACEAE : 
Ribes inebriens Lindl., Colorado. 
Ribes leplanthum A, Gray, Colorado, New Mexico. 
Ribes longifohum Nutt., Colorado. 
Ribes pumilum Nutt., Colorado. 
Ribes Purpust Koehne, Colorado, New Mexico, Wyoming. 
TYPE LOCALITY : Rocky Mountains [Colorado], on Ribes [leptanthumr}. 
DISTRIBUTION: Central Rocky Mountain region. 
EXSICCATI: Ellis & Ev. N. Am. Fungi 2258. 
3. Coleosporium Mentzeliae (Dietel & Holway) Arthur. 
Stichopsora Mentzeliae Dietel & Holway, Bot. Gaz. 31: 337. 1901. 
O and I. Pycnia and aecia unknown. 
II. Uredinia hypophyllous, scattered, 0.5 mm. or less across, early naked, orange-yellow 
fading to white, ruptured epidermis barely noticeable; urediniospores globoid, 20-24 by 20- 
28; wall rather thin, 1.5-2u4, closely and conspicuously verrucose, with elongate papillae. 
III. Telia hypophyllous, scattered, small, 0.25 mm. across, blood-red fading to pale- 
yellow; teliospores with wall swelling to 8 thick above; contents orange-yellow fading to 
colorless, cylindrical, or somewhat clavate, 14-20 by 24-45 #, rounded at both ends. 
On LOASACEAE : 
Mentzelia hispida Willd., Jalisco. 
TYPE LocaLity: Chapala, Mexico, on Mentzelia hispida. 
DISTRIBUTION : Central Mexico. 
4. Coleosporium Begoniae Arthur, sp. nov. 
O and I. Pycnia and aecia unknown. 
II. Uredinia hypophyllous, scattered, 0.5 mm. across, soon naked, yellow fading to 
white, very pulverulent, ruptured epidermis inconspicuous; urediniospores ellipsoid, or 
