184 NORTH AMERICAN FI.ORA [Voi<UMB 7 



4. Spirechina Rubi (Dietel & Hoi way) Arthur. 



Uromyces Rubi Dietel & Holway; Holway, Bot. Gax. 31 : 327. 1901. 



O. Pycnia epiphyllous, few in small groups, 0.3-0.5 mm. across, on larger discolored 

 spots which are 0.8-2 mm. across, pustular, prominent, flatten ed-hemispheric, 75-120 /^ 

 broad and less than half as high. 



II. Uredinia at first epiphyllous, usually surrounding the pycnia, groups 0.5-2 mm. 

 across, sori irregular in outline, 0.1-0.3 mm. across in shortest diameter, usually somewhat 

 elongate and often confluent into one or more rings, at first bullate, soon naked and ap- 

 planate, pulverulent, orange- colored fading to whitish, ruptured epidermis overarching and 

 conspicuous; urediniospores obovate or ellipsoid, 17-21 by 23-32 ju; wall pale-yellowish, or 

 nearly colorless, moderately thick, 1.5-2 fi, sometimes thicker above, 2-5 /^, strongly 

 spinosely-echinulate, the points about 3 fi apart, often much longer and more prominent on 

 apical part, the pores very indistinct, seemingly 3 or 4 and equatorial ; secondary form not 

 well shown, probably hypophyllous, and the spores thinner-walled and less strongly 

 echinulate. 



III. Telia hypophyllous, minute, arising from the stomata, in indefinite groups, 

 0.8-1.5 mm. across on larger yellow areas, seemingly pulverulent, white; teliospores 

 irregularly ovoid or ellipsoid, 15-25 by 24-32 yu, often somewhat pointed above and nar- 

 rowed below; wall colorless, uniformly thin, 1 /^ or less, smooth. 



On Rosaceae : 



Rubus adenotrichos Schlecht., Veracruz. 



Rubus glaucus Benth. , Guatemala. 



Rubus poliophyllus Focke, Guatemala. 



Rubus sp., Michoacan, Morelos. 

 Type LOCALITY : Cuernavaca, Mexico, on Rubus sp. 

 Distribution : Central Mexico southward into Central America. 



5. Spirechina epiphylla Arthur, sp. nov. 



O. Pycnia unknown. 



II. Uredinia hypophyllous, small and inconspicuous, only a few seen ; urediniospores 

 ellipsoid or broadly obovate, 18-20 by 20-24 fi ; wall nearly or quite colorless, thin, 1-1.5 /i, 

 finely and closely echinulate, the pores 3 or 4, approximately equatorial. 



III. Telia epiphyllous, numerous in circinnating groups 2-4 mm. across, aecioid, 

 roundish or irregular, small but distinct, about 0.1 mm. across, rarely confluent, soon 

 naked, white or whitish, velvety, ruptured epidermis inconspicuous ; teliospores originat- 

 ing within the enlarged epidermal cells, irregularly fusiform, 12-19 by 34-45 /i, narrowed 

 at both ends ; wall colorless, uniformly thin, 1 //, smooth ; pedicel short, one half length 

 of spore or less, more or less deciduous, colorless, terete. 



On Rosaceae : 



Rubus trivialis Michx., Texas. 

 Type collected at College Station, Texas, on Rubus trivialis^ May 22, 1890, H. S.Jennings. 

 Distribution : Known only from the type locality. 



25. KUEHNEOLA Magn. Bot. Centr. 74: 169. 1898. 



Cycle of development includes pycnia, uredinia, and telia ; autoecious. Pycnia sub- 

 cuticular, other sori subepidermal. 



Pycnia flattened, hemispherical, without ostiolar filaments, 



Uredinia erumpent, definite, with no paraphyses in the primary form, but usually with 

 paraphyses in the secondary form. Urediniospores borne singly on pedicels ; wall usually 

 pale or quite colorless, echinulate or verrucose-echinulate, the pores obscure, usually 2 or 

 3, equatorial. 



Telia erumpent, definite, without paraphyses. Teliospores free, three- to several-celled 

 by transverse septa ; wall colored or sometimes nearly colorless, smooth or somewhat 

 roughened at apex, the pores one in each cell, apical. 



Type species, Phragmidium albidum Ludw. (on Rubus sp.). 



Teliospores few- (3-5-) celled, pedicellate. 



Secondary uredinia usually without paraphyses. 1. K . obtusa. 



Secondary uredinia usually with paraphyses. 2. K, JDuchesneae, 



