COMPOSITE. 4 177 
6. Tithonia tagetiflora, Desf. in Ann. Mus. Par. i. p. 48, t.4; Bot. Reg. t.591. 
SoutH Mexico, Acapulco (Sinclair). Hb. Kew. 
There are also specimens in Kew herbarium labelled “ Realejo (Sinclair),” probably 
in error. 
7. Tithonia thurberi, A. Gr. in Proc. Amer. Acad. viii. p. 655. 
Nortu Mexico, Sonora (Thurber, 910). Hb. Kew. 
8. Tithonia tubeformis, Cass. Dict. xxxv. p. 277; DC. Prodr. v. P. 584. 
Helianthus tubeformis, Ort. Dec. p. 101; Bot. Reg. t. 1519. 
NortH Mexico, region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer, 456, 
459), Zacatecas (Coulter, 372) ; Sour Mexico, Tacubaya, valley of Cordova, and valley 
of Orizaba (Bourgeau, 217, 1566, 3244); Guaremata (Bernoulli, 217). Hb. Kew. 
9. Tithonia, sp. 
SoutH Mexico, valley of Cordova (Bourgeau, 962). Hb. Kew. 
Perhaps a state of T. tubeformis. 
121. VIGUIERA. 
Viguiera, H. B. K. Nov. Gen. et Sp. iv. p. 224, t. 379; Benth. et Hook. Gen. Plant. ii. p. 375. 
An exclusively American genus of about sixty herbaceous or half-shrubby species, 
dispersed from Mexico to Buenos Ayres. 
1. Viguiera buddleizformis, Benth. et Hook. Gen. Plant. ii. p. 375. 
Helianthus buddleieformis, DC. Prodr. v. p. 588. 
Tithonia angustifolia, Hook. et Arn. Bot. Beech. Voy. p. 435. 
NortH Mexico, Cerro de Pinal (Seemann, 1481); SourH Mexico, Tepic (Sinclair), 
Tacubaya (Schaffner, 159), San Nicolas and Santa Fé (Bourgeau, 965, 965 bis), about 
Villalpando (Mendez), without locality (Bates, Tate, Mairet, &c.). Hb. Kew. 
2. Viguiera canescens, DC. Prodr. v. p. 579. 
SoutH Mexico, Leon, west of Guanajuato (Mendez). 
3. Viguiera cordifolia, A. Gr. Pl. Wright. i. p. 107, ii. p. 88. 
New Mexico.—Norrs Mexico, Santa Cruz, Sonora, and Chihuahua, common (Wright). 
Hb. Kew. 
4, Viguiera dentata, Spreng. Syst. iii. p. 15; DC. Prodr. v. p. 579. 
Helianthus dentatus, Cav. Ic. iii. p. 10, t. 220. - 
Mexico. 
5. Viguiera excelsa, Benth. et Hook. Gen. Pl. ii. p- 875. 
Helianthus excelsus, Willd. Sp. Pl. i. p. 2243. 
Tithonia excelsa, DC. Prodr. v. p. 585. 
Helianthus giganteus, Cav. Ic. t. 219, non Linn. nec Lour. 
BIOL. CENT.-AMER., Bot. Vol. IT., June 1881. 2a 
