COMPOSITA. 261 
2. Malacothrix tenuifolia, Torr. & Gr. Fl. N. Am. ii. p. 487; Torr. Bot. U.S. 
& Mex. Bound. Surv. p. 106. 
Catirornia.— Nortu Mexico, Sonora (Schott). 
209. TARAXACUM. 
‘Taraxacum, Hall, Stirp. Helv. i. p. 23; Benth. et Hook. Gen. Plant. ii. p. 522. 
A widely dispersed genus of herbaceous plants, comprising about half a dozen species 
according to some authors, though no fewer than forty have been described. 
1. Taraxacum officinale, Wigg. Prim. Fl. Hols. p. 56 (1780). 
Taraxacum dens-leonis, Desf. Fl. Atl. 11. p. 228. 
Taraxacum mexicanum, DC. Prodr. vii. p. 146. 
This plant has a wide distribution in the temperate and mountainous regions of the 
north and south, and it is indigenous in the Rocky-Mountain range; but we have no 
proof of its being indigenous in Mexico, though it is now common enough in many 
districts as a weed of cultivation. 
210. PYRRHOPAPPUS. 
Pyrrhopappus, DC. Prodr. vii. p. 144; Benth. et Hook. Gen. Plant. ii. p. 523. . 
About four or six herbaceous species inhabiting the Southern States of N. America 
and Mexico. 
1. Pyrrhopappus carolinianus, DC. Prodr. vii. p. 144; A. Gr. Man. Bot. 
Northern U.S. ed. 5, p. 280. 
VIRGINIA southward to FLORIDA and westward to Texas and New Mexico.—Nortu 
Mexico, Sonora (Schott). 
2. Pyrrhopappus multicaulis, DC. Prodr. vii. p. 144. 
Trxas.—Nortu Mexico, Tamaulipas (Berlandier), region of San Luis Potosi, 6000 to 
8000 feet (Parry & Palmer, 555), without locality (Bates). Hb. Kew. 
3. Pyrrhopappus pauciflorus, DC. Prod. vii. p. 144. 
Chondrilla pauciflora, Sessé et Mog., ex Don in Trans. Linn. Soc. xvi. p. 180, nec Ledeb. 
Mexico (Mogino & Sessé.) 
4, Pyrrhopappus sesszeanus, DC. Prodr. vii. p. 144. 
Chondrilla sesseana, Don in Trans. Linn. Soc. xvi. p. 144. 
Mexico (Mogino & Sessé). 
211. CALYCOSERIS. 
Calycoseris, A. Gr. Pl. Wright. ii. p. 104; Benth. et Hook. Gen. Plant. i. p. 523. 
Two annual herbaceous species, the second Californian. 
1. Calycoseris wrightii, A.Gr. Pl. Wright. ii. p. 104, t. 14. 
Norra Mextco, Sonora and along the Rio Grande (Smith). Hb. Kew. 
