COMPOSIT A. 133 
55. PLUCHEA. 
Pluchea, Cass. in Bull. Philom. 1817; Benth. et Hook. Gen. Plant. ii. p. 290. 
Shrubs, undershrubs, or, rarely, herbs. About thirty species, inhabiting the warmer 
regions of America, Africa, Asia, and Australia. 
1. Pluchea auriculata, Hemsley, Diag. Pl. Nov. pars altera, p. 32. 
Caulibus vel ramis subsimplicibus crassiusculis sulcatis strigosis, foliis sessilibus lanceolatis vel 
oblongis mucronatis calloso-serratis basi auriculatis scabridis, capitulis paucis grandiusculis 
pedunculatis, involucri bracteis linearibus acutis pluriseriatis scabridis, floribus numerosissimis, 
pappo corolle squilongo, acheniis pubescentibus. 
Herba (?) perennis, caulibus vel ramis subsimplicibus, crassiusculis, sulcatis, strigosis. Folia caulina 
sessilia, lanceolato-oblonga, 2-8-pollicaria, mucronata, calloso-serrata, supra scabrida, subtus 
strigilloso-pubescentia, basi auriculata, auriculis amplexicaulibus. Capitula pauca, pedun- . 
culata, 6-8 lin. vel ultra diametro ; involucri bractez lineari-elongate, acute, pluriseriate, 
scabride. Flores numerosissimi; pappus corolle equilongus. Achenia compressa, angulata, 
pubescentia.—Pluchea subdecurrens, Benth. Pl. Hartw. p. 17, nec Cass. 
South Mexico, Guanajuato (Hartweg). Hb. Kew. 
2. Pluchea cortesii, DC. Prodr. v. p. 452. 
Conyza cortesii, H. B. K. Nov. Gen. et Sp. iv. p. 75. 
Soutn Mexico, near the city of Mexico (Humboldt & Bonpland). 
3. Pluchea odorata, Cass. Dict. xlii. p. 3; DC. Prodr. v. p. 452. 
Conyza odorata, Linn. Sp. Pl. p. 1208. 
Fioripa; Bermupas.—NortH Mexico (Berlandier) : SoutH Mexico, Orizaba (Botteri, 
1083), valley of Cordova (Bourgeau, 1796), Sierra San Pedro Nolasco &c. (Jurgensen) ; 
Nicaragua, Chontales (Tate, 146), without locality (rsted, 167).—North part of Sourn 
America and the West Inpies. Hb. Kew. 
4. Pluchea purpurascens, DC. Prodr. v. p. 452. 
Conyza purpurascens, Sw. Fl. Ind. Oce. p. 1342. 
Lovtstana.— Mexico, La Antigua, Vera Cruz (Galeotti, 2268), Santiago Estato (Lieb- 
mann, 59), Yucatan and Tabasco (Johnson, 22). Hb. Kew. 
5. Pluchea subdecurrens, Cass. Dict. xlii. p. 4; DC. Prodr. v. p. 450. 
- Sovra Mexico, between Istla and Acaistla (Humboldt & Bonpland), near Tantoyuca 
(Ervendberg, 343), Colipa (Liebmann, 432), pine-forests, Chiapas (Linden, 427), without 
locality (Parkinson, 3). Hb. Kew. 
56. TESSARIA. 
Tessaria, Ruiz et Pav. Prodr. Fl. Peruv. p. 112, t. 24; Benth. et Hook. Gen. Plant. ii. p. 291. 
About five shrubby species, inhabiting Western America, from California to Chili. 
