520 NORTH AMERICAN FLORA [VoLumE 7 
11. Teleutospora Bidentis (Lagerh.) Arthur & Bisby. 
Uromyces Bidentis Lagerh. Bull. Soc. Myc. Fr. 11:213. 1895. 
Caeomurus Bidentis Kuntze, Rev. Gen. 33: 449, 1898, 
Uromyces densus Arth. Mycologia 7:196. 1915. 
O. Pycnia unknown. 
III. Telia hypophyllous, numerous, in small circinating groups on roundish, discolored 
spots 1-4 mm. across, sometimes confluent, roundish or oval, 0.1-1 mm. across, the central 
sorus largest, surrounded by the smaller ones, early naked, compact, pulvinate, dull cinnamon- 
brown, becoming waxy-cinereous from germination, surrounding epidermis inconspicuous; 
teliospores obovoid or oblong, 15-23 by 30-45 wu, rounded or narrowed above, natrowed below; 
wall pale cinnamon-brown, thin, 1 yu, thicker above, 4-9 y, smooth; pedicel hyaline, once or twice 
length of spore. 
. This species is correlated with Klebahnia Bidentis (P. Henn.) Arth., the pycnia and telia 
being morphologically indistinguishable from that species. Sometimes the two forms occur 
intermixed upon the same leaf, and seemingly arise from the same mycelium. When more 
fully studied it may be found advisable to unite them under one name. 
On CaRDUACEAE: 
Bidens leucantha (1,.) Willd., Porto Rico. 
Bidens pilosa V,., Haiti; Porto Rico. 
Bidens squarrosa H.B.K. (B. antiguensis Coult., B. tereticaulis DC.), Costa Rica. 
TYPE LocALITy: Ecuador, on Bidens andicola. 
DIsTRIBUTION: West Indies and Central America; also in South America. 
37. *MICROPUCCINIA Rostr. Plantep. Haandb. 266. 1902. 
Puccinia Link, Ges. Nat. Freunde Berlin Mag. 7:29. 1815. Not Puccinia Willd. 1787, nor Puc- 
cinia Pers. 1794. 
Caeoma § Dicaeoma Nees, Syst. Pilze 16. 1816. 
Leptopuccinia Rostr. Plantep. Haandb. 268. 1902. 
Dasyspora Arth. Résult. Sci. Congr. Bot. Vienne 346. 1906. Not Dasyspora Berk. & Curt. 1853. 
Polioma Arth. Jour. Myc. 13: 29. 1907. 
Sclerotelium Sydow, Ann. Myc. 19: 172, 1921, 
Coronotelium Sydow, Ann. Myc. 19:172. 1921. 
Trailia Sydow, Ann. Myc. 20: 121. 1922. 
Cycle of development includes pycnia (frequently obsolete) and telia, both subepidermal 
or the pycnia rarely subcuticular. 
Pycnia submerged in the tissues of the host beneath the epidermis, globoid or flask- 
shaped, with protruding ostiolar filaments (or when subcuticular, superficial and conic, without 
ostiolar filaments). 
Telia erumpent, or occasionally long covered by the epidermis, definite, often in cir- 
cinating groups, compact, sometimes confluent into a cumulative mass, frequently cinereous 
by germination of the spores at their maturity, especially when unaccompanied by pycnia, 
or pulverulent. Teliospores free, pedicelled, two-celled, in some species also few or many 
one-celled (mesospores); wall colored, in a few species nearly or quite colorless, firm, smooth 
or less often verrucose, with one pore in each cell, usually in the upper part. 
Type species, Micropuccinia Ribis (DC.) Rostr. on Ribes rubrum. 
Host belonging to family Liliaceae. 
Teliospore-wall conspicuously and irregularly tuberculate. 1. M. tumamocensis. 
Teliospore-wall finely and inconspicuously striate. 2. M. Moreniana. 
Host belonging to family Convallariaceae. 3. M. mesomajalis. 
Host belonging to family Aristolochiaceae. 4. M. asarina. 
Host belonging to family Polygonaceae. 5. M. ornata. 
Host belonging to family Chenopodiaceae. 6. M. Eurotiae. 
Host belonging to family Portulacaceae. 7. M. agnita. 
Host belonging to family Caryophyllaceae. 
Teliospore-wall nearly or quite uniformly thin. 8. M. detonsa. 
Teliospore-wall much thickened above. 
Telia round or oval. 9. M. Arenariae. 
Telia long and linear. 10. M. hystertiformis. 
Host belonging to family Ranunculaceae. 
Telia long covered by epidermis. ll. M. Pulsatillae. 
Telia soon naked. 
Teliospores clavate or fusiform, smooth. 
Teliospores narrow, 12-16 pu. 12, M,. Anemones-virginianae. 
Teliospores broad, 20-26 p. 13. M. gemella. 
*Micropuccinia in collaboration with HERBERT SPENCER JACKSON. 
