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IOWA ACADEMY OF SCIENCE 
seriously affected, leaf, twigs, and fruit bearing the rust while the infection 
on the cultivated apple is only nominal. 
188. Gymnospoeatsgium Nidus-avis Thaxter. 
Ill on Juniperm virginiana L. 
Not uncommon on cedar trees on the windward side of high bluffs, but so 
far not taken on the leward side of hills or on level land where the wind is 
broken at a short distance. 
189. Ueomyces acumikatus Arth. 
II, III on Spartina cynosuroides Willd. 
Not uncommon. Probably the aecia of this species appears on Polemonium. 
190. Ueomyces albus D. & H. 
I on Vida americana Muhl. 
The aecia were rather abundant but telia were not observed. This is the 
only species of Uromyces we have which omits the uredinia. 
191. Ueomyces Caladii (Schw.) Farl. lAecidium Caladii Schw.] 
I, II, III on Arisaema triphyllum (L.) Schott. 
I on Arisaema dracontium (L.) Schott. 
One of our most abundant and most conspicuous rusts. 
192. Ueomyces Euphoebiae Cooke & Peck. lAccidiiim EupliorMae Schw\] 
I, II, III on EupUorMa humistrata Engelm. 
Common and abundant. The erect habit of the plant infected with the aecia 
renders it a comparatively conspicuous species. 
193. Ueomyces Pabiae (Pers.) de Bary. lAecidium porosum Peck.] 
Ill on Lathyrus venosus Muhl., and Yicia americana Muhl. 
Not common nor abundant. 
194. Ueomyces Howei Peck. 
II, III on Asclepias syriaca L. 
Rather common and where found quite abundant. 
195. Ueomyces Lespedezae-peocumbentis (Schw.) Curt. [U. Lespedezae 
(Schw.) Peck.] 
Ill on Lespedeza capitata Michx. 
Not very common nor overly abundant. 
196. Ueomyces pyeifoemis Cooke. 
Ill on Acorus calamus L. 
Rather abundant on the only clump of the host visited. October. 
197. Ueomyces Rudbeckiae Arth. & Holw. 
Ill on Rudl)eckia laciniata L. 
Common and abundant on the wild form of the host but not seen on the 
cultivated variety. The only Uromyces in our territory which produces telia 
without either aecia or uredinia. 
