ROBINSON AND GREENMAN. GENUS MIKANIA. 13 



Willd. Spec. iii. 17-i-l, but apparently very different from Aublet's plate 

 of Eupatorium parvijiorum, PI. Guiau. ii. t. 315. — Nicaragua and 

 Panama, ucc. to Hemsley. 



-I- -!- Scales of the involucre obtuse : leaves cordate-hastate at the base. 



10. M. punctata, Klatt, 1. c. Heads described as 7-flowered. — 

 Clairieres du General, Costa Rica, Pittier, no. 3434, and banks of a 

 stream at Buenos Ayres by same collector, no. 4934. 



•t- -4- •(- Scales of the involucre acute : leaves cordate or hastate, rarely 



subtruncate at the base. 



11. M. cordifolia, Willd. 1. c. 1746. M. suaveolens, HBK. Nov. 



Gen. & Spec. iv. 135. M. gonoclada, DC. Prodr. v. 199. M. Fendleri, 



Klatt, Abh. Naturf. Gesellsch. Halle, xv. 4 (of reprint). — W. Louisiana, 



Hale ; Mexico, San Luis Potosi, Palmer^ nos. 1079, 1115, and on rocky 



slopes of Tamasopa Canon, Pringle, no. 3928 ; Colima, Palmer, no. 



1207; Acapulco, Palmer, no. 565; Cordova, Bourgeau, no. 1812; 



Wartenberg, Huasteca, Ervendherg, no. 82 ; Mirador, Sartorius ; also 



somewhat doubtful specimens from Guatemala, altitude 4,600 feet, 



Donnell Smith, no. 2366, and Navarro, Costa Rica, by the same collector, 



no. 4855. 



* * Heads decidedly smaller, 2| to 3 lines in length. 



12. M. scandens, Willd. 1. c. 1743. Leaves smoothish, acuminate ; 

 hastate basal lobes little spreading. — 31. Orinocensis, HBK. 1. c. 134. 

 Eupatorium scandens, L. Spec. ii. 836 ; Jacq. Ic. Rar. t. 169. — From 

 N. Eng. to W. Canada, Florida, and Texas ; Mexico, Victoria, Tamau- 

 lipas, Berlandier, nos. 852, 2272 ; San Bias, W. G. Wright, no. 1339 ; 

 Cordova, Bourgeau, nos. 1632, 2184; Orizaba, Botteri ; Oaxaca at Cui- 

 catlan, L. C. Smith, no. 247, and near Reyes, E. W. Nelson, no. 1861 ; 

 Guatemala, Esquintla, Hayes, Masagua, Donnell Smith, no. 2394, and 

 Ambelice, Heyde 3f Lux (no. 3434 of Donnell Smith's sets) ; Nicaragua, 

 G. Wright ; Panama, Seemann ; also W. India, Trop. Am., and warmer 

 parts of the Old World. 



13. M. dentiCTilata, Willd. 1. c. 1744. Leaves very scabrous, 

 obtusish, hastate basal lobes widely spreading. — S. Mexico at Jalapa 

 ace. to Lessing ; Guiana, Schomburgk. * 



Dubious species. 



M. ANGULATA, M. REPANDA, and M. Tlalixcotan, La Llave, El 

 Mosaico Mexicano, ii. 299 ; Seemann in Hook. Jour. Bot. & Kew Misc. 

 V. 79, from Cordova and vicinity, are unrecognized species founded solely 

 upon foliar and very doubtful characters. 



M. coriacea. La Llave, 1. c, Seemann, 1. c, is from its alternate 

 leaves positively to be thrown out of the genus. 



