COMPOSITA. 179 
16. Viguiera spherocephala, Hemsley. 
Leighia spherocephala, DC. Prodr. v. p. 582. 
Mexico (Alaman). 
17. Viguiera triquetra, DC. Prodr. v. p. 579. 
SourH Mzxico, near San Angel (Alaman, Berlandier, 827, 937 ). 
18. Viguiera urticiformis, Hemsley. 
Leighia urticiformis, DC. Prodr. v. p. 582. 
SoutH Mexico, near Guanajuato (Mendez). 
19. Viguiera, sp. 
SoutH Mexico, valley of Mexico (Bourgeau, 1222). Hb. Kew. 
20. Viguiera, sp. 
Nort Mexico, region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer, 467); 
SourH Mexico, Chapultepec (Bourgeau, 365). Hb. Kew. 
122. HELIANTHUS. 
Helianthus, Linn. Gen. Plant. n. 979; Benth. et Hook. Gen. Plant. ii. p. 376. 
An exclusively American genus of herbs, comprising about fifty species, chiefly north 
temperate, but extending southward to Peru and Chili. 
1. Helianthus amplexicaulis, DC. Prodr. v. p. 589. 
SoutH Mexico, Leon, west of Guanajuato (Mendez). 
2. Helianthus cernua, Benth. et Hook. Gen. Pl. ii. p. 376. 
Flourensia cernua, DC. Prodr. v. p. 593. 
Texas; New Mexico.—Norta Mexico, Saltillo (Gregg), Monterey to Lampasos 
(Berlandier, 1401), region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer, 469). 
Hb. Kew. | 
3. Helianthus ciliaris, DC. Prodr. v. p. 587; A. Gr. in Proc. Amer. Acad. 
1862, p. 164. 
Texas.—NortH Mexico, Sonora (Thurber). Hb. Kew. 
4. Helianthus cornifolius, H. B. K. Nov. Gen. et Sp. iv. p. 223. 
SourH Mexico, Santa Rosa de la Sierra, at 8700 feet (Humboldt & Bonpland). 
5. Helianthus laciniatus, A. Gr. Pl. Fendl. p. 84. 
Nortn Mexico, valley of Nazas, Bolson de Mapimi, and west of Coahuila (Gregg), 
valley of San Luis Potosi (Schaffner). Hb. Kew. 
6. Helianthus laurifolius, Benth. et Hook. Gen. Pl. ii. p. 376. 
Flourensia laurifolia, DC. Prodr. v. p. 592; Deless. Ic. Sel. iv. t. 35. 
NortH Mexico, between Vittoria and Tula (Berlandier, 2205), San Luis Potosi to 
Tampico (Palmer, 1109). Hb. Kew. 
2a 2 
