84 COMPOSITA. 
caria, utrinque attenuata, apice vix acuta, margine calloso-denticulata, supra scabrida, subtus 
puberula, simul glandulis minutis rufis creberrime instructa. Capitula mediocria, multiflora, 
pauca, corymbosa; involucri bractez numerose, biseriatz, lineares, acute, rigide, pilose ; 
receptaculum nudum, leviter conicum ; corolla subcylindrica, puberula, simul parce glandulosa. 
Achenia glabra, sepissime 4-angulata, basi oblique callosa; pappus brevis, cupulatus, 4-5- 
dentatus. 
SourH Mexico, Uruapan, Michoacan, at 4000 feet (Galeotti, 2451). Hb. Kew. 
20. Ageratum tomentosum, Hemsley. 
Celestina tomentosa, Benth. in Vidensk. Meddel. 1852, p. 71. 
South Mexico, valley of Orizaba (Bourgeau, 2924), Real del Monte (Coulter, 247), 
Jalapa, at 3000 feet (Galeotti, 2202), province of Vera Cruz (Linden, 1185), Chiapas 
(Ghiesbreght, 547); GuatemMaLa, Capetillo, Volcan de Fuego, 4600 feet (Salvin) ; 
Costa Rica, mountains of Candelaria (rsted). Hb. Kew. 
20. SCHATZELLIA. 
Schetzellia, Schz. Bip. in Flora, 1850, p. 419; Benth. et Hook. Gen. Plant. ii. p. 242. 
‘Limited at present to one annual species :— 
1. Schetzellia mexicana, Schz. Bip. in Flora, 1850, p. 419. 
South Mexico, ravines of the Tierra Caliente, at 1500 feet (Galeotti, 2302), Acasonica, 
_ Vera Cruz (Linden, 1168). Hb. Kew. 
21. STEVIA. 
Stevia, Cav. Ic. iv. p. 32, tt. 354-856 ; Benth. et Hook. Gen. Plant. ii. p. 242. 
From eighty to 100 herbaceous and half-shrubby American species, chiefly western, 
from Mexico to Chili, a few occurring in Buenos Ayres, Brazil, and Guiana. 
1. Stevia angustifolia, H. B. K. Nov. Gen. et Sp. iv. p. 149. | 
Soutn Mexico, Santa Rosa de la Sierra &c., 7200 to 8000 feet (Humboldt & Bonpland), 
without localities (Bates, Parkinson). Ub. Kew. 
2. Stevia aschenborniana, Schz. Bip. in Linnea, xxv. p. 269. 
Stevia podocephala, Schauer in Linnea, xix. p. 718, nec DC. 
Mexico (Aschenborn). 
3. Stevia berlandieri, A. Gray, in Torr. Bot. Emory Rep. p. 73, in adnot. 
NortH Mexico, region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer), 
near Saltillo (Gregg, 224). Hb. Kew. 
4, Stevia canescens, H. B. K. Nov. Gen. et Sp. iv. p. 143. 
New Mexico.—Nortu Mexico, Sonora (Wright); Sour Mexico, Real del Monte 
(Coulter, 276, 277), Aguas Calientes (Hartweg), about Guanajuato and Chalma, 6600 
