1918] ARTHUR—UREDINALES 473 
Aecia hypophyllous, pasa over the whole leaf surface, 
cylindric, large, o.5-o.8 mm. in diameter, o. 5-1 mm. high, at 
first incurved, then erect, the cits erose; aeciospores globoid, 
18-21 by 21-26 uw; wall colorless, thin, 1~1.5 u, appearing smooth. 
No aecia have been reported before on this host. There is a 
Puccinia Enceliae Diet. and Holw. known from Mexico, but no 
aecia have been associated with it as yet, and the chances that the 
present collection should be referred to it are few.. 
24. UREDO sp. (on Carduaceae).—Baccharis sp., vicinity of 
La Paz, Bolivia, August 9, no. 18840. 
This collection, showing only uredinia, and with the host 
specifically undetermined, cannot be located with any degree of 
confidence. 
25. UREDO ERYTHROXYLONIS Graz. (on Erythroxylonaceae).— 
Erythroxylon Coca Lam., La Paz, Bolivia, August 16, no. 18916. 
A common rust wherever coca is cultivated. .No other stage 
in the life cycle is known. In the present collection fully 50 per 
cent of the spores are distinctly paler in their lower part than above. 
INDEX TO UREDINALES 
New and newly combined names are in bold-faced type 
Aecidium Enceliae 23 Puccinia sphenica 20 
spilanthicola 21 
Chrysocelis Lupini 2 
Spilanthis 21 
Cleptomyces Lagerheimianus 4 
Coleosporium Senecionis 1 
Diorchidium Berberidis 5 
Puccinia Acnisti 17 
ambusarum 11 
Cuzcoensis 19 _ 
Enceliae 23 
unicolor 20 
Sphenospora Berberidis 5 
quitensis 3 
Uredo Bambusarum 11 
Hydrocotyles 15 Mogiphanis 13 
Lagerheimiana 4 Olyrae 11 
malvacearum 14 Sp. 24 
Mogiphanis 13 Uromyces Cestri 10 
Montoyae 19 crassipes 7 
Nicotianae 16 elatus 8 
Piptadeniae 5 Howei 9 
Roseanae 12 leptodermus 6 
Spegazzinii 18 Uropyxis quitensis 3 
texana 3 
