1 "7 « ► i stilaginacese, Ustilago, 



sporarum atro-brunnea; sporis dimorphis, minoribus globosis, ru- 

 gosis, brunneis, 7-8 a. diam., majoribus 12-15 ;j.. diam. globosis, 

 levibus, pallidioribus, fere hyalinis. 



Ifab. in ovariis Panici sanguinalis, Holly Springs Miss. 

 Am. bor. (Tracy). 



22. Ustilago stipicola Speg. Myc. Argent. ser. II, 1902, p. 59. — 1G01 

 Soris, paniculas infectantibus ac illas in pulverem atram totam 

 transformantibus, pulverulentis; sporis subglobosis levibus ab ini- 



tio liberis, tenuiter fcunicatis 4-5 a. diam., ferrugineis. 



Hab. in paniculis nondurn evolutis Stip;e setigern' et St. 

 filiculmis in Argentina. 



23. Ustilago nummularia Speg. Mycet. argent. ser. II, 1902, p. 59. ] " 

 — Partes infecta3 subimmutat c, vaginis parum ampliatis involutse; 

 soris compactiusculis, aterrimis, epidermidem parum tumefactam 

 incolentibus; sporis o fronte visis orbicularibus 4-5 \i. diam., la- 

 tere breviter linearibus 1,5-2 \x. cr.. levibus, obscure atro-oli- 

 vaceis. 



Hab. in culmis et intiorescentiis nondum evolutis Stipae? 

 cujsdam La Piata Argentimu. 



24. Ustilago calcarea Griffiths in Bull. of the Torr. Bot. Club, 1904. 1610 

 p. 85, fig. 8. — Pustulis nullis; soris orbicularibus 5 mm. diam. 



vel elongato-connuentibus, erumpentibus, culmicolis foliicolisque; 

 sporis fuligineis, coacervatis nigris, irregularibus, globosis v. ova- 

 tis, siepe acuminatis, 7-10 ;x. diam , guttula magna proeditis, epi- 

 sporio minuto, levi donatis. 



Hab. in culmis foliisque Bouletou;r brevisetae in solo 

 gypso-calcareo pr. Roswell, in Amer. bor. 



25. Ustilago elegans Griffiths in Bull. of the Torr. Bot. Club, 1902, 1611 

 p. 292, fig. 3. — Soris immersis, maturitate folium totum occu- 

 pantibus; sporis subglobosis, subangulosis vel suboblongis, 10-13 



a. diam. ; episporio circ. 1 a. crasso, minuto echinulato. 



Ilab. m foliis Chloridis elegantis, Cochize, Arizona Amer. 

 borealis. 



26. Ustilago Eriocauli (Mass.) Clinton, in Journ. of Mycol. 1902, p. 137. 

 Uuc ducenda Cmtractia Eriocauli Massee — Syll. XI, p. 233: 

 cfr. Ust. Eriocauli Clint. in Rhodora 1901, III, p. 82. 



Hab. in ovariis subimmutatis Eriocauli septangular is . 

 South Billerica Mass. Amer. bor. — Sori nigri, ovoidei, distiu- 

 cte bilobi, 0,7-1 mm., firmi non facile rupti ; spor;e in massam 

 atro-olivaceam dense compactae, irregulariter polygoniai vel sub- 



