COMPOSITA. 229 
1. Hymenoxys chrysanthemoides, DC. Prodr. v. p. 661. 
Actinea chrysanihemoides, H. B. K. Nov. Gen. et Sp. iv. p. 298, t. 411. 
Nort Mexico, region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer, 524) ; 
Sour Mexico, Chalco (Andrieux, 316). Hb. Kew. 
184. PSATHYROTES. 
Psathyrotes, A. Gr. Pl. Wright. ii. p. 100; Benth. et Hook. Gen. Plant. ii. p. 415. 
Herbaceous plants restricted to North Mexico and the adjoining country. 
1. Psathyrotes ramosissima, A. Gr. in Proc. Amer. Acad. vii. p. 363, ix. p. 206. 
CALIFORNIA; ARIzONA.—NortH Mexico, Sonora. 
2. Psathyrotes scaposa, A. Gr. Pl. Wright. ii. p. 100, t. 13. 
Norra Mexico, near El Paso and Santa Maria, Chihuahua (Bigelow &c.). Hb. Kew. 
3. Psathyrotes schottii, A. Gr. in Proc. Amer. Acad. ix. p. 206. 
Peucephyllum schotti, A. Gr. in Torr. Bot. U.S. & Mex. Bound. Surv. p. 74. 
Norra Mexico, Sonora (Schott, Thurber). Hb. Kew. 
Bentham and Hooker retain the genus Peucephyllum, doubtfully referring it to 
the Senecionidee (Gen. Plant. ii. p. 438). 
Tribe VII. ANTHEMIDE. 
Anthemidee, Benth. et Hook. Gen. Plant. ii. pp. 167 et 203. 
Forty-five genera, including nearly 700 species, are referred to this tribe. Of these 
only twelve genera and sixty-three species are American ; and only three of the genera 
are endemic in America. 
185. ACHILLEA. 
Achillea, Linn. Gen. Plant. n. 971; Benth. et Hook. Gen. Plant. ii. p. 419. 
A genus of about one hundred herbaceous species, inhabiting the northern hemi- 
sphere, and chiefly in the Old World. 
1. Achillea millefolium, Linn. Sp. Pl. p. 1267; DC. Prodr. vi. p. 24; Fl. Dan. 
t. 737. 
Souta Mexico, Omitlan (Hartweg), Desierto Viejo (Bourgeau, 838). Hb. Kew. 
This plant is dispersed all round the temperate zone of the northern hemisphere, and 
extends into the Arctic regions; but it may have been introduced into Mexico. 
186. BAILEYA. 
Baileya, Harv. & A. Gr. Pl. Fendl. p. 105 ; Benth. et Hook. Gen. Plant. ii. p. 428. 
Herbs, endemic in the Mexican region. 
