COMPOSITA. 2538 
Volcan de Fuego, at 8300 feet (Salvin); Costa Rica, Volcan de Irazu, 8000 to 9000 
feet (Grsted). Hb. Kew. 
Perhaps we have included more than one species under this name. 
13. Cnicus undulatus, A. Gr. in Proc. Amer. Acad. x. p. 42. 
Cirsium undulatum, Spreng. Syst. iti. p. 874; DC. Prodr. vi. p. 651. 
Cirsium grahami, A. Gr. Pl. Wright. ii. p. 102; Bot. Mag. t. 5885. 
Upper Mississippr and SaskaATcHEWAN southward.—Nortu Mexico, Sonora ( Wright, 
Thurber). Tb. Kew. 
14. Cnicus wrightii, A. Gr. in Proc. Amer. Acad. x. p. 41. 
Cirsium wrightii, A. Gr. Pl. Wright. ii. p. 101. 
Texas; New Mexico.—Norri Mexico, Sonora (Wright). Hb. Kew. 
199. CENTAUREA. 
Centaurea, Linn. Gen. Plant. n. 984; Benth. et Hook. Gen. Plant. ii. p. 477. 
A genus of between 300 and 400 herbaceous species, with the exception of the 
South-American species, indigenous in the northern hemisphere, chiefly the Mediter- 
ranean region; one only is indigenous in North America, and about four or five in 
extratropical South America. Three or four species are widely diffused weeds of 
cultivation. 
1. Centaurea americana, Nutt. in Journ. Acad. Philad. ii. p. 117; Bart. Fl. 
Amer. Sept. ii. t.50; Torr. & Gr. Fl. N. Amer. ii. -p. 453. 
Centaurea nuttallii, Spreng. Syst. iv. (Suppl.) p. 298. 
Centaurea mexicana, DC. Prodr. vi. p. 575. 
Plectocephalus americanus, Don in Sweet’s Brit. Fl. Gard. ser. 2, t. 51. 
ARKANSAS; Lovistana; Texas; New Mexico.—Norta Mexico, Chihuahua (Gregg), 
Chiricahui Mountains (Rothrock). Tb. Kew. 
Tribe XII. MUTISIACEZA. 
Mutisiacee, Benth. et Hook. Gen. Plant. ii. pp. 168 et 214. 
Fifty-three genera are referred to this tribe; and these embrace about 450 species, 
most of which are shrubs or rigid herbs. They find their greatest concentration in 
western South America; a few occur in Tropical and South Africa, Central and Eastern 
Asia; and one is indigenous in Australia. 
200. ONOSERIS. 
Onoseris, DC. in Ann. Mus. Par. xix. p. 65, t. 12; Benth. et Hook. Gen. Plant. ii. p. 486. 
About twelve herbaceous and shrubby species in the Andes and extratropical South 
America, and one in Brazil. 
