tQ NATURAL HISTORY BULLETIN. 



parmi les puccinies; elle nait a la surface inferieure des feuilles, et 

 J forme des anneaux briins, arrondis et reguliers, au milieu desquels 

 I'epiderme de la feuille reste sain; les puccinies qui composent 

 ces anneaux, sont tres-remarquables par leur petitesse; elles adhe- 

 rent fort peu au receptacle, lequel est peu apparent, et sont portees 

 sur un pedicelle tres-court. Ces 3 caracteres semblent rapprocher 

 cette espece des uredo, niais ses pericarpes sont tres-certainement 

 divises en 2 loges par une cloison transversale. Je I'ai trouvee sur 

 la veronique de Pona, et sur la \eronique a feuilles d'ortie. 



Joanna fragilipes: spots dark, deeply concave; sori pul- 

 vinate, scattered or sometimes confluent along the veins, red- 

 dish brown, pulverulent; spores I2~i8 by 32-40//, oblong or fusi- 

 form, constricted, with a conical thickened apex which is paler 

 than the spore; membrane smooth, light brown, pedicel hya- 

 line, fragile, about the length of the spore. Plate 11.. Fig. 9a. 



Fonna ■persistens.; spots yellow to dark, deeply concave: 

 sori scattered or sometimes clustered, pulvinate, at first light 

 brown, then grev with the germinating spores. Two forms 

 of spores are found in the same sorus; brown, thick-walled 

 spores, which fall readily from the slender pedicels and which 

 have not germinated, \\\kt forma fragilipcs described above, 

 and thinner walled spores. 12-14 ^7 36-40/', with broad per- 

 sistent pedicels, which have germinated. Often a large cen- 

 tral sorus is found, grev with the germinating spores, and 

 surrounded bv minute sori of ^\\^ forma fragjUpcs.. Plate 11.. 

 Fig. 9b. 



Reported in Farlow's Host Index on ]'eroiiica alpiua. 



Wise, la. 



10. PucciNiA xANTiiii vSV/'ri'. (1822. Syn. Fuug. Car., p. 73. ) 

 loa. On Xanthiitm canadcnsc Mill. Ann Arbor. Mich.. 

 Jlohvay. 



lob. Pine Ridge. Fresno Co.. Cal.. Mainzvaring: 

 IOC. Decorah, la., Ilolivay. 



Orig. Descr. "500. 15. Xanthii Sz. P. macula tenui orbiculari pallida, 

 subtus fusco-brunnea pallide marginata, sporidiis oblongis bilocu- 

 laribus pedicellatis. In a\ ersa pagina foliorum Xanthii strumarii. 

 locis arenosis. Subtus primum pallidas vesiculas, cellularum folii 

 lemulas, exhibet, quibus disruptis et epidermide orbatis, cohseren- 

 tem pustulam fuscam exhibent sporidia, sub lente lutea, pedicello 

 longiore quani spotidia." 



