LIST OF GENERA AND SPECIES 1341 
Helenium campestre Small. Type, Little Rock, Ark., Hasse, May 25, 1885, in Herb. 
ARX B tuU 
Helenium polyphyllum Small. Type, Bain, Pl. Tenn. Occ., no. 77, in Herb. C. U. 
Helenium Helenium (Nutt. ) Small.  Leptopodum Helenium Nutt. 
Helenium incisum (T. & G.) Small. Leptopoda incisa T. & G. 
Gaillardia trinervata Small. Type, Palmer, Ind. Terr., no. 448, in Herb. C. U. 
Mica zu santha Small. Type, Bowie Co., Tex., Eggert, June 13, 1898, in Herb. 
Thymophylla tagetoides (T. & G.) Small. Hymenatherum tagetoides, T. & G. 
Thymophylla polychaeta (A. Gray) Small. Hymenatherum polychaetum A. Gray. 
Thymophylla Wrightii (A. Gray) Small. Hymenatherum Wrightii A. Gray. 
Thymophylla tenuiloba (DC.) Small. Hymenatherum tenuilobum DC. 
Thymophylla pentachaeta (DC.) Small. Hymenatherum pentachaetum DC. 
Thymophylla Treculii (A. Gray) Small. Hymenatherum Treculii A. Gray. 
Thymophylla gnaphaloides (A. Gray) Small. Hymenatherwm gnaphaloides A. Gray. 
Mesadenia similis Small. Type, Benton Co., Ark., Plank, 1899, in Herb. N. Y. D. G. 
Mesadenia maxima Harper. Type, Harper, Ga. Pl., no. 1164, in Herb. N. Y. B. G. 
Mesadenia difformis Small. Type, Walton Co., Fla., Curtiss, 1885, in Herb. N. Y. B. G. 
Mesadenia sulcata (Fernald) Small.  Cacalia sulcata Fernald. 
Senecio rotundus (Britton) Small. Senecio obovatus rotundus Britton. 
Carduus Helleri Small. Type, Heller, Pl. So. Texas, no. 1720, in Herb. C. U. 
Carduus austrinus Small. Hee: Wright, Coll. N. Mex., no. 1291, in Herb. C. U. 
Carduus revolutus Small. Type, Fla., Chapman, in Herb. C. U. 
Carduus flaccidus Small. Type, La., Carpenter, in Herb. C. U. 
Carduus pinetorum Small. Type, Cocoanut Grove, Fla., Small & Nash, Nov. 2 & 5, 1901, 
in Herb. N. Y. B. G. ; ne 
Nabalus cylindricus Small. Type, Roan Mt., Tenn., Britton, Sept. 9, 1885, in Herb. C. U. 
