Arthur: New species of Uredineae 31 



wall medium thick, 1-2/i, pale-yellowish, sparsely and minutely 

 echinulate, pores obscure. 



III. Telia hypophyllous, columns scarcely extending beyond 

 the peridia, about as long as broad ; teliospores cylindrical or 

 polygonal, small, 6-9 by 13-17/i, wall smooth, thin, 0.5-0.8/i, 

 colorless. 



On Canavalia ensiformis DC, Mayaguez, Porto Rico, April 

 1 6, 1 904, G P. Clinton 87. 



An especially interesting rust on account of the combination 

 of a melampsoraceous fungus with a leguminous host. The col- 

 lection shows an abundance of telia. They are less conspicuous 

 than the uredinia, and need to be studied by means of sections. 

 The possession of a peridium in the uredinia at once widely sepa- 

 rates the species from any of the usual leguminous rusts. The 

 telia resemble those of Dietelia, only are much smaller. The 

 species possesses a uredinial stage, however, which is absent in 

 Die telia. Except in the length of the telial column, there is con- 

 siderable resemblance to Cronartium. 



Coleosporium Eupatorii sp. nov. 



II. Uredinia chiefly hypophyllous, scattered, round, small, 

 0.25 mm. across, early naked, pulverulent, yellow fading to white, 

 ruptured epidermis somewhat noticeable ; urediniospores short 

 ellipsoid, or globoid, 15-20 by 22-27/i ; wall colorless, medium 

 thick, 2-2. 5/j, half formed by the rather large, irregular, deciduous 

 tubercles. 



III. Telia unknown. 



On Eupatorium niacrophylhim L., El Yunque, Baracoa, Cuba, 

 March 12, 1903, E. W. D. Holway (type) ; Eupatorium sp., Volcan 

 Mombacho, Department of Granada, Nicaragua, February 20, 

 J 903> C. F. Baker 2461, communicated by E. W. D. Holway. 



The species is distinguished from Coleosporium Steviae Arth. 

 by larger uredinia and smaller urediniospores. The walls of the 

 spores are thicker, and the tubercles larger and noticeably irregular 

 in form, not round and papilliform as in C. Steviae and many 

 other species. 



Uredo Dichromenae sp. nov, 



II. Uredinia hypophyllous, scattered, oblong, 0.2-0.5 mm. 

 long, covered by the overarching epidermis, and having an apparent 

 peridium of hyphae ; urediniospores elliptical, or broadly obovate, 



