1 88 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



On Cruciferae: 



Sisymbrium linifolium (Nutt.) T. & G. 

 Type locality: Helena, Montana, on Sisymbrium linifolium 



(Kelsey, May 19, 1889, 54). 

 Distribution: Known only from Helena, Montana. 



Note. — The life history of this species is uncertain, as the evi- 

 dent perennial aecia are accompanied by pycnia and telia, making 

 a complicated condition. Culture work with this species must be 

 carried out before its life history can be known with certainty. 

 Most specimens referred to this species belong either to Puccinia 

 Holboellii (Hornem.) Rostr. or A ecidium monoicum Peck. 



14. Allodus effusa (D. & H.) Arth. Result. Sci. Congr. Bot. 



Vienne 345. 1906 



Puccinia effusa Diet. & Holw. Erythea 3: 81. 1895. 



Aecia amphigenous, in rather loose groups often scattered over 

 large portions of the leaf or along the petiole, more rarely annular, 

 circular; aeciospores 16-23 by 19-30 /i; wall 1-1.5 m thick, very 

 inconspicuously verrucose. 



Telia amphigenous, chiefly arising in or around the aecia, early 

 naked, dark chocolate-brown; teliospores broadly ellipsoid to 

 oblong, 20-30 by 32-51 /x; usually rounded at both ends; wall 

 chestnut to light chocolate-brown, 2.5-3 M thick, moderately 

 verrucose above, nearly smooth below, the apex rarely thickened 

 up to 5 m; pedicel colorless, rarely the length of spore. 



Urediniospores occurring sparingly in the telia, golden yellow, 

 21-26 by 27-35 /i, moderately echinulate; wall 3-3.5 m thick, the 

 pores 2, opposite, usually equatorial. 



On Violaceae: 



Viola lobata Benth. and V. praemorsa Dougl. 

 Type locality: Dunsmuir, California, on Viola lobata. (Holway, 



May 30, 1894.) 

 Distribution: Washington to Northern California. 

 ExsicCATi: Sydow, Ured. 2371; Barth. N. Am. Urcd. 1438. 



Note. — An undescribed Dicaeoma on Viola occUata, and a Dasy- 

 spora, also undescribed, on Viola lobata Srom Dunsmuir, California, 

 are evidently correlated species. Dicaeoma Violae differs in 

 having thinner-walled and usually lighter-colored teliospores. 



