Uredinales, PucciniaceEe, Pucciniese, Uromyces. 65? 



neis, apice saepe papiila depressa latiore briinneola auctis, epi- 

 sporio 2 \i cr. ; pedicello liyalino decidno sporam subaequante 

 praeditis. 



Hah. in foliis P o 1 y g a 1 a e p e r s i c a r i a e f o 1 i a e v. affi- 

 nis, Kipayo, Uganda, Africa trop. (Dummer). 



69. Uromyces fuscatUS J. C. Arthur, Bull. Torr. Bot. Cl. 45., 1918, 2415 

 ]). 142. — Aecidiis ampbigenis in greges 3-5 mui. cr. dispositis; pe- 

 ridiis breviter cylindraceis margine erecto lacerato praeditis ; cel- 

 hilis peridialibus rbomboideis, 28-37 ^ 13-19, tunica extus 7-9 |ji cr, 

 minute tranverse striata, intus 2,5-3,5 \i cr. moderate verrucosa ; 

 aecidiosporis globosis 16-22 [x diam., tunica byalina 1-1,5 [i cr., mi- 

 nute crebreque verrucosa ; uredosoris ampbigenis sparsis, rotun- 

 datis 0,3-0,8 mm. diam., elevatis mox nudis, pulveraceis obscure 

 cinnamomeo-brunneis epidermide rupta cinctis; uredosporis globosis 



V. late ellipsoideis, 22-29 ^ 18-24, tunica cinnamomeo-brunnea 2-3 {a 

 cr. crebre minuteque verrucosa, poris 3-4 subaequatorialibus prae- 

 dita ; teleutosoris sparsis, rotundatis v. irregularibus 0,5-2 mm. 

 diam. subconfluentibns, mox nudis, prominentibus, obscure casta- 

 ueo-bruuneis 2-2,5 \i cr. apice 3-5 {x cr., verrucis lineariter dispo- 

 sitis ornatis; pedicello byaliuo sporam longitudine subaequante^ 

 fragili. 



Eab. in foliis Polygoni alpini AIL, House Creek Idabo 

 (Nelson et Macbride), Summit County Utab (A. O. Garrett), 

 Amer. bor. 



70. Uromyces tingitanus P. Henn. — Sacc, Syll. XVII p. 257, XXI 24i6 

 p. 572. — Aecidiis ampbigenis (cfr. Hariot, Bull. Soc. Mycol. Fr. 

 1914 p. 236, Urom. tingit.), flavo-melleis aggregatis," saepius circu- 

 latim in eadem macula saturate-purpurea ac uredosori dispositis, 

 cupulatis, margine non vel vix reflexe laceratis ; cellulis pseudo- 

 peridii fere acbrois, polymorpbis, rite pentagono-bexagoniis, tu- 

 nica eoncolore crassiuscula donatis, leviter veruiiculatis, 24-30 * 



22 ; aecidiosporis achrois laevibus , sphaericis oblongisve, utra- 

 que fine saepius abrupte deplanatis, sat crasse tunicatis, 24-26 ^ 

 16-20. 



Hah. in foliis R u m i c i s t i u g i t a n i , prope Les Ongious 

 (Herault), Gallia (de Crozals). 



71. Uromyces Thellungi Maire, Bull. Soc. H. X. de l'Afr. du Xord, 2417 

 1917, p. 147. — Uredosoris amphigenis, maculis miuutis purpureis 

 plerumque insidentibus, sparsis v. aggregatis, saepe circiuantibus, 

 rotundatis, 0,5-1 mm. diam., interdum confluentibus, diu epidermide 



Syll. fung. XXIII (VI-1924) ' 42 



