56 BOTANICAL GAZETTE. 



species, both in its effused mode of growth and in its much shorter 

 pedicel, whose length is scarcely equal to the diameter of the spore. 

 Uromyces compacta. — Spots none or obsolete; sori compact, 

 orbicular or oblong, blackish-brown; spores elliptical or oblong, ob- 

 tuse or bluntly pointed, .0014-.0019 of an inch long, .0009-001 

 broad; pedicel colorless, equalling or exceeding the spore in length. 

 Dead stems of some ''Composite plant/ 1 Arizona. May. 

 Pringle. 



Uromyces versatilis. — Spots none; sori numerous, minute, 

 amphigenous, rotund or oblong, slightly elevated, ochraceous-brown; 

 spores oblong or oblong-pyriform, generally separating from the 

 pedicel when old, .0009-0012 of an inch long, .0005-0006 broad; 

 pedicel short. 



Living branches, petioles and leaves of Acacia Greggii. Arizo- 

 na. May. Pringle. 



This is an aberrant species, and approaches Trichobasis in its 

 deciduous spores. The young spores are subglobose and borne on 

 pedicels larger than themselves, thus resembling the paraphyses of 

 some species of Lecythea. The color of the spores is pale ferrugin- 

 ous, or reddish-brown with an ochraceous tint. The fungus is 

 abundant on the young branches as well as on the leaves of the host 

 plant. 



Puccinta Gayophyti. — Spots none; sori small, scattered, am- 

 phigenous, reddish-brown ; spores obovate or subelliptical, generally 

 constricted at the septum, obtuse, smooth, .0012-0016 of an inch 

 long, .0008-00095 broad; pedicel short, colorless. 



Living leaves of species of Gayophytum. Soda Springs, Califor- 

 nia. Jones. Northern California. Aug. Pringle. 



Peridermium filamentosum. — Peridia numerous, irregularly 

 arranged, erumpent, three or four lines long, one or two lines broad, 

 cylindrical or subcompressed, obtuse at the apex, membranous, 

 whitish when evacuated, containing a central bundle of loose per- 

 current concolorous longitudinal filaments which are attached to 

 the inner surface at the apex; spores varying from subglobose or 

 broadly elliptical to oblong-ovate or oblong-elliptical, yellow-orange. 

 .0011-.0013 of an inch long, .00064-.0008 broad, epispore thick, 

 minutely roughened. 



Living branches of Pinus ponderosa. Arizona. July. Prin- 

 gle. 



This is a very interesting species. Its peculiarity is found in 

 the central longitudinal filaments which extend through the mass 

 of spores from the base to the apex of the peridium. The surface 

 of these filaments is covered with minute protuberances which ap- 

 pear when magnified as if they might be immature spores. In the 

 specimens before me none of the peridia are open at the apex, and 

 in this respect also a remarkable departure is made from the generic- 

 character. The peridia in some of the specimens are longitudinally 

 ruptured, thus indicating a relationship to the genus Pcestelia. 



