CLINTON: NORTH AMERICAN USTILAGINEAE. 
449 
var. Nuttalliana , Colo., N. Mex.; A. Pennsylvania , N. Y., Wise.; 
A. Virginiana , la., Tex.; Anemonella thalictroides ^. Y.; Ilepatica 
acutiloba , la., Ill., IncL, N. Y., Wise.; H. triloba , Mo.; Ranunculus 
adoneus , Utah; A?. fascicularis , Ill.; Ranunculus sp., Utah.; 
Trollius sp., N. Y. 
This is the common Urocystis on Ranunculaceae east of the 
Rocky Mountains. While there are some slight differences in its 
appearance on different hosts these do not seem to be specific. 
Usually the species is distinguished from the other species on 
Ranunculaceae by the one or two spores being incompletely sur¬ 
rounded by sterile cells. Recently the specimens on Actaea, 
which have been listed under this species, have been examined and 
found to agree more closely with those on Cimicifuga and so they 
are included here under Urocystis carcinodes. The specimen on 
Trollius has not been seen. The germination has been described 
by Fischer de Waldheim, Plowright, and Brefeld (23). 
Urocystis carcinodes (B. & C.) Fisch. de Waldh. 
Thecaphora carcinodes B. & C., Grev., 3 : 58. 1874. 
Urocystis carcinodes Fisch. de Waldh., Aper^. Syst. Ust., 38. 1877. 
Exsiccati: Urocystis carcinodes (B. & C.) Fisch. de Waldh., on Actaea 
rubra , Ell., Ev., & Barth., Fungi Col., 1891, on Cimicifuga racemosa, Kell., 
Ohio Fungi, 79. 
Sori on stems, petioles, or midribs, rarely on blades, forming very 
conspicuous outbreaks that cause considerable distortion of infected 
parts, upon rupture disclosing dusty brown black spore mass; spore 
balls ovoid to subspherical, firm, chiefly 25—45 p in length ; sterile 
cells hyaline or yellowish tinted, ovoid to subspherical, usually com¬ 
pletely covering the spores, often thick walled, 6-12 ^ in length; 
spores reddish brown, ovoid to subspherical or polyhedral, smooth, 
usually 12-16 p in length. 
Hosts : Actaea alba , AY. Va.; A. rubra , Utah ; Actaea sp., Penn.; 
Cimicifuga racemosa , N. Car., Ohio, Penn, (type), Tenn. 
This species forms very conspicuous outbreaks causing considera¬ 
ble distortion to the host. It is between Urocystis Anemones and 
Urocystis sorosporioides , having firmer spore balls more completely 
covered with sterile cells than the former and usually smaller spore 
balls with fewer fertile cells, generally 1-6, than the latter. Its ger¬ 
mination has not been reported. 
