218 BOTANICAL GAZETTE. 



The species is remarkable for frequently producing biseptate 

 spores ; in Avliich character it approaches the genus Phragmidmm. 

 Sometimes two or three of these spores are visible at once in the 

 field of the microscope, so numerous are they. 



PucciNiA iNTERMixTA. — vSpots uoue ; sori abundant, scattered, often 

 intermingled with the vEcidium, amphigenous, dark reddish-brown; 

 spores oblong-elliptical, obtuse, slightly constricted at the sej)tum, 

 .0014-.0016 of an inch long, .0008-.0009 of an inch broad; pedicel 

 very short or none. 



Leaves of Iva axillaris. Green River, Wyoming Territory. July. 

 M. E. Jones. 



Puccinia Physalidis. — Spots none; sori abundant, frequently con- 

 liuent and occupying the whole lower surface of the leaf, reddish- 

 in-own; spores elliptical or oblong-elliptical, often irregular, slightly 

 constricted at the septum, .0012-.0016 of an inch long, .0008-. 001 of 

 an inch broad ; pedicel hyaline, nearly equal to the spore in length. 



Leaves of PJnjsalis viscosa. Colorado. June. M. E. Jones. 



SoROSPORii'M AsTRAGALi.-Spore-masses subglobose, compact, .001- 

 .002 of an inch in diameter, purplish-brown, destroying the seeds and 

 filling the pod ; spores six to twelve in a mass, minutely rough, close- 

 ly adhering to each other and somewhat flattened on their contiguous 

 faces, subglobose, .0000-.0008 of an inch in diameter. 



In the pods of Astragalus Drummondu. Colorado. May. M. E- 

 Jones. 



The species is closely related to S. Desmodii, but its spores are 

 more minutely rough and have a decidedly darker purplish-brown 

 color. It fills the whole j)od with its dusty mass, not even leaving 

 the external coat of the seeds. 



Trichobasis Oxytropi. — Spots none ; sori scattered or crowded, am- 

 phigenous, reddish-brown; spores obovate or broadly elliptical, mi- 

 nutely rough, .001 of an inch long, .0007 of an inch broad. 



Leaves of Oxytropis Lamberti. Colorado. T. S. Brandegee. Com- 

 municated by E. A. Ban. 



Trichobasis gaurina. — Sori few, scattered, erumpent, dark-brown ; 

 spores subglobose or elliptical, minutely rough, .0008-.001 of an inch 

 long, generally containing a shining nucleus. 



Leaves of Gaura coccinea. Colorado. June. 31. E. Jones. 



JEciDiUM gaurinum. — Peridia amphigenous, numerous, scattered or 

 crowded, generally occupying the whole lower surface of the leaf,' 

 scattered on the upper surface, short; spores subglobose, bright-yel- 



