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IOWA ACADEMY OP SCIENCE 
The conspicuous secia of early spring are followed directly by the incon- 
spicuous telia, the uredinia being elided. Not as common as the abundance 
of the host would indicate. 
230. PucciNiA PoLYGONi-AMPHiBiAE Pei’S. {^Aecidium Geranii DC.] 
I on Geranium maculatum L. 
II, III on Polygonum ampTii'bium L. 
The aecia are rather common, but never abundant, while the telia were col- 
lected but once, then in fair abundance. 
231. PucciNiA PUSTULATA (Curt.) Arth. [A. pustulatum Curt., Puccinia 
Andropogi Schw.] 
I on Comandra um'bellata (L.) Nutt., and G. pallida A. DC. 
Ill on Andropogon furcatus L. 
Rather a common species, and always abundant when found. 
232. Puccinia punctata (Str.) Link. 
II, III on Galium tinctorium L. 
Rare, and never abundant. 
233. Puccinia Rhamni (Pers.) Arth. [P. coronata Corda.] 
II, III on Avena sativa. L. 
This is the common rust of oats. It is quite abundant, especially on self 
sown oats. 
234. Puccinia Silphii Schw. 
On Silphium perfoliatum L. 
The telia appear in early spring and continue in fair abundance throughout 
the summer. The secia and uredinia are omitted in this species. 
235. Puccinia S'orghi Schw. [P. Maydis Carrau.] 
On Zea Mays L. 
Common, but apparently not detrimental, at least to any considerable ex- 
tent. 
236. Puccinia Taraxaci Plowr. [P. flosculosorum (A. & S.) Wint.] 
II, III on Taraxacum officinale Willd. (T. Taraxacum Karst.) 
Common and abundant throughout the summer. The secia are elided. 
237. Puccinia Ueticae (Schum.) Lagerh. [Aeeidium Urticae Schum., P. 
caracis Aut. p.p.] 
I on TJrtica gracilis L. 
Aecia collected sparingly, telia not seen. 
238. Puccinia violae (Schum.) DC. 
I on Yiola papilionacea Nutt., V. pudescens Ait., and V. scahriuscula Schw. 
The secia are abundant in spring but later stages have not been observed. 
>/ 239. Aecidium Campanulastri n. sp. 
On Campanulas trum americanum (L.) Small (Campanula americana L.), 
Fayette, Iowa, June 25, 1909. 
