Finuji of Illinois. 157 



teleutospores are divided like a Pucciuia; but because a few 

 such spores are found among many of single cells, the species 

 should not be transferred to the latter genus unless there is 

 good reason to suppose that the single celled spores are the ab- 

 normal ones. 



In England the aecidial forms of the greater proportion of 

 the Uromycetes are supposed to be known ; but in our own flora 

 almost nothing has been demonstrated. In the following those 

 species which have their aecidia on the same host are thus indi- 

 cated in the notes. 



U. hyperici, (Schw.) Curt. 



I. Hypophyllous; spots small, scattered, purplish; aecidia 

 minute, about six (one to nine) in a cluster, semi-immersed; 

 short; spores orange. 



II., III. Hypogenous; spots small, light cinnamon or pur- 

 ple; sori numerous, scattered. Uredoforms and teleutoforms 

 often in the same sorus, the latter succeeding the former. II. 

 Sori small, roundish, long covered by the epidermis, then sur- 

 rounded by its ruptured remains; spores light yellow, globose 

 to elliptical-oblong, minutely echinulate, 16-19 by 19-27 A*. 

 III. Sori becoming larger, angular and conspicuous, ruptured 

 epidermis prominent; spores elliptical or oblong, tapering to 

 the base, strongly thickened at the obtuse or rounded apex; 

 12 by 21-27 n; pedicel tinted, 1-2 times the length of the 

 spore. 



Spots on the stem pilose-strigose, purple; sori scattered, acuminate- 

 ovate, bullate, elevated, surrounded by the ruptured epidermis. Schw. 

 N". Am. Fungi, No. 2843, p. 292. 



On Hypericum mutilum: Union, Oct. 25, 2008, I., III.; 

 Elodesvirginica: Cook, Sept. 6, 1447, II., III.; Sept. 8, 1462, 

 II., III.; LaSalle, Sept. 28, 6218. 



Cooke (Proceedings Portland Soc. Nat. Hist., Vol. 1, part 

 II., p. 184) described, under the name Uromyces triquetra, a 

 species on Hypericum, and questioned its identity with the plant 

 described by Schweinitz. Peck (25th Rep. p. 74) adopts the 

 name given by Cooke, but Farlow (Ellis N. A. Fungi, 281) 

 uses, for what seems to be the same, Schweinitz's name. In 



