THE UREDINALES FOUND UPON THE ONAGRACEAE 
Key, based upon life history 
Pyemia and aecia only occurring upon Onagraceae. 
Aecia diffused. 
Aecia in groups. 
Aeciospore wall thick, 2-3 ix. 
Aeciospore wall thin, i tx. 
Spores larger, 14-21 11 long. 
Spores smaller, 13-15 m long (Eur.) 
Pycnia, aecia, and telia occurring upon Onagraceae. 
Teliospores up to 60 fx in length. 
Teliospores up to 45 ^t in length (Eur.) 
Pycnia, aecia, uredinia, and telia occurring upon Ona- 
graceae. 
Teliospores one-celled. 
Teliospores two-celled. 
Characters of the latter (S. A.) 
Life-history uncertain; possibly same as P. 
Epilohii-tetragoni (Afr.) 
Uredinia and telia only occurring upon Onagraceae. 
Telia within or below epidermis. 
Characters similar to the latter (Eur.). 
Pycnia (when formed) and telia occurring upon Ona- 
graceae. 
Teliospore apex scarcely thickened, 1.5-4^1. 
Teliospore wall smooth, 3 fx thick. 
Teliospore wall verrucose, 1.5-2 fx thick. 
Teliospores smaller, 13-18 by 27-37 ix. 
Teliospores larger, 17-25 by 30-44 ju. 
Teliospore apex considerably thickened, 5-12 ix. 
Teliospores somewhat smaller, up to 40 ^l. 
Teliospores medium, up to 50 ju. 
Teliospores somewhat larger, up to 60 tx. 
Uredinia only known upon Onagraceae (S. A.). 
Puccinia Veratri. 
Aecidium Anograe. 
Puccinia Peckii. 
Aecidium Circaeae. 
Puccinia Jussiaeae 
( Puccinia Ludwigiae) . 
Puccinia Epilohii- Fleischeri, 
Uromyces plumharius. 
Puccinia Epilohii-tetragoni. 
Puccinia luxurians. 
Puccinia Krookii. 
Pucciniastrum pustiilatum. 
Pucciniastrum Circaeae. 
Puccinia sphaeroidea?* 
Puccinia scandica. 
Puccinia Epilohii. 
Puccinia Circaeae. 
Puccinia Fuchsiae. 
Puccinia gigantea. 
Uredo oenothericola. 
Key, based upon spore forms independently 
Aecia in groups, i. e., infection local. 
Aecisopore wall thick, 2-3 ^i. 
Aeciospore wall thin, i fx. 
Aecia small, 0.2-0.3 mm. across. 
Aeciospores 15-21 ix long. 
Aeciospores 13-15 ix long. 
Aecia larger, 0.3-0.6 mm. across. 
* Doubtfully upon Onagraceae. 
Aecidium Anograe. 
Puccinia Jussiaeae 
{Puccinia Ludwigiae). 
Aecidium Circaeae. 
Puccinia Peckii. 
