CALIFORNIA ACADEMY OF SCIENCES. 27 



Nearly allied to P. tidrellca B. & C. and P. spreta. Differs 

 from P. (Uredo) heiulierce, Schw. in having spores J larger, 

 with a more distinctly pointed tip. 



Puccinia digitata. 



I. II. Hymenium and Stylospores. Unknown. 



III. Telentospores. Hypophyllous; sori round 1 — I mm., 

 solitary, dark brown, prominent, surrounded by the ruptured 

 epidermis, and marked by pale depressions on the upper 

 surface: spores remarkably persistent, clavate, lower cell 

 much the longer, pale; the upper red-brown; epispore thick- 

 ened upward and terminating in 1 — 7, digitate processes; 

 pedicel J as long as the spore, stout, persistent. /< 45 — 

 54 X 15—18. 



On living leaves of Ehamnus crocea. 



Tamalpais — all the year. 3257. 



Differs from P. coranata in the much larger and more 

 prominent sori, in the darker upper cell, and relatively 

 shorter process of the epispore. 



Puccinia melanconioides. 



I. Hymenium. iEcidium amphigenous ; peridia scat- 

 tered on faded spots, or arranged in an interrupted circle 

 round the margin. 



II. Stylospores. Unknown. 



III. Teleutospores. Sori round, scattered quite evenly 

 over the surface, covered at first by the epidermis which 

 soon ruptures in a circumscissile manner, leaving a round 

 white peridium-like base about which the dark brown, broad- 

 ly elliptic, slightly constricted spores, breaking from their 

 short pedicels, accumulate, presenting much the appearance 

 of a Melanconium. /< 28—50 x 16 — 28. 



On the upper surface of living leaves of Dodecatheon Mea- 

 dia. Antioch, Cal. April. 3101. 



Allied to P. jarlmvIcB, but spores larger and darker. 



Puccinia nodosa. . 



I. II. Hymenium and Stylospores. Unknown. 



