‘Part 7, 1922] AECIDIACEAE 481 
7. Klebahnia Montanoae (Arth. & Holway) Arthur. 
Uromyces Montanoae Arth. & Holway; Arth. Mycologia 10:127. 1918. 
O. Pycnia unknown. 
II. Uredinia hypophyllous, scattered, round or oblong, 0.1-1 mm. across, early naked, 
pulverulent, cinnamon- or light chestnut-brown, ruptured epidermis evident; urediniospores 
with pores in optical section appearing obovate-triangular or flattened-triangular, 23-26 p 
wide, with pores in surface view obovoid or elliptic, 19-23 by 23-28 »; wall cinnamon-brown, 
thin, 1-1.5 », moderately echinulate, the pores 2, equatorial. 
III. Telia hypophyllous, scattered, round, 0.3-0.5 mm. in diameter, early naked, compact, 
dark cinnamon-brown becoming cinereous from germination, ruptured epidermis inconspicu- 
ous; teliospores narrowly obovoid or ovoid, 18-21 by 29-40 u, rounded above, rounded or 
narrowed below; wall cinnamon-brown, thin, 1 », thickened at apex, 4-7 », smooth; pedicel 
colorless or yellowish, up to 50 » long. 
On CaRDUACEAE: 
Montanoa dumicola Kiatt, Costa Rica. 
Montanoa hibiscifolia Benth., Guatemala. 
Montanoa Pittieri Rob. & Greenm., Guatemala. 
TYPE LocaLity: San Lucas Toliman, Solola, Guatemala, on Montanoa Pittieri. 
DisTRIBuTION: Central America. 
8. Klebahnia Bidentis (P. Henn.) Arth. Mycologia 7: 196. +1915. 
Uredo Bidentis P. Henn. Hedwigia 35: 251. 1896. 
Puccinia Bidentis Dietel & Holway; Holway, Bot. Gaz. 24: 32. 1897. 
Uredo bidenticola P. Henn. Hedwigia 37: 279. 1898. 
Uredo amaniensis P. Henn. Bot. Jahrb. 38: 106. 1905. 
Uromyces bidenticola Arth. Mycologia 9: 71. 1917. 
O. Pycnia amphigenous, numerous, in small groups, honey-yellow becoming darker, 
globoid, 100-140 » in diameter; ostiolar filaments few, 20-30 long; pycniospores large, 
5-7 » in diameter. 
II. Uredinia amphigenous, circinating about the pycnia or scattered on indefinite, dis- 
colored spots, roundish, 0.2-0.8 mm. across, rather tardily naked, pulverulent, cinnamon- 
brown, ruptured epidermis conspicuous; urediniospores ellipsoid or obovoid, 19-27 by 27-35 yu, 
sometimes slightly flattened with pores in optical section; wall cinnamon-brown, variable 
in thickness, 1.5—-3 », moderately and distinctly echinulate, the pores 2, equatorial or slightly 
superequatorial. ' 
III. Telia amphigenous, usually hypophyllous, frequently crowded or circinately con- 
fluent on pale, discolored spots, roundish, 0.2-1 mm. across, early naked, pulvinate, light 
cinnamon-brown becoming cinereous by germination, ruptured epidermis inconspicuous; 
teliospores obovoid or oblong-clavate, 16-24 by 29-45 y, rounded above and slightly narrowed 
below; wall pale cinnamon-brown or colorless, very thin, 1 », thickened into a colorless umbo 
at apex, 5-10», smooth; pedicel colorless, once to twice length of spore, persistent. 
Own CaRDUACEAE: 
Bidens expansa Greene, California. 
Bidens heterophylla Ortega( B. arguta H.B.K.), Mexico (state?); Guatemala. 
Bidens Holwayi Sherff & Blake, Guatemala. 
Bidens leucantha \., Florida; ‘Mexico (state), Morelos, Puebla; Guatemala; Bahamas; 
Cuba; Porto Rico; Jamaica: Martinique. 
Bidens pilosa L., California; Costa Rica; Guatemala; Nicaragua; Bermuda; Cuba; 
Porto Rico; "Martinique. 
Bidens squarrosa H.B.K. (B. tereticaulis DC., B. tereticaulis antiguensis Coult.), Oaxaca; 
Costa Rica; Guatemala. 
Bidens sp., Hidalgo. 
Cosmos caudatus H.B.K., ae orn aaa 
‘Type Locauity: Ecuador, on Bidens andicola 
Gemcoon Southern Florida and southern California, southward through the West Indies 
and Central America; also in South America, Africa, and Asia. 
ILLUSTRATIONS: McAlpine, Rusts Austr. pl. 28, f. 243, 244. 
Exsiccatr: Barth. Fungi Columb. 4493, 4691, 4887; Barth. N. Am. Ured. 782, 783, 1686, 2484, 
