COMPOSIT.A. 209 
Tribe VI. HELENIOIDEA. 
Helenioidee, Benth. et Hook. Gen. Plant. ii. pp. 167 et 199. 
Fifty-nine genera are included under this tribe, whereof all, except two, are endemic 
in America, chiefly inhabiting extratropical regions. The species number nearly 300, 
by far the greater part being herbaceous, or only shrubby at the base. 
147. JAUMEA. 
Jaumea, Pers. Syn. Plant. ii. p. 397; Benth. et Hook. Gen. Plant. ii. p. 397. 
Six species are referred to this genus, two of which (one unpublished) inhabit 
Tropical Africa, the others California, Mexico, and Buenos Ayres. They are herbs or 
undershrubs. 
1. Jaumea mexicana, Benth. et Hook. Gen. Plant. ii. p. 397. . 
Espejoa mexicana, DC. Prodr. v. p. 660. 
Mexico, San Dionisio (Alaman) ; Nicaraeua, Granada (Crsted, 225). Hb. Kew. 
2. Jaumea peduncularis, Benth. et Hook. Gen. Pl. ii. p. 397. 
Chethymenia peduncularis, Hook. et Arn. Bot. Beech. Voy. p. 298, t. 62. 
Sout Mexico, Jalisco (Beechey). Hb. Kew. 
148. OLIV ZEA. 
Olivea, Schz. Bip.; Benth. in Hook. Ic. Pl. t. 1103; Benth. et Hook. Gen. Plant. ii. p. 897. 
An herbaceous monotype, endemic in Mexico. 
1. Olivea tricuspis, Schz. Bip.; Hook. Ic. Pl. t. 1103. 
Souta Mexico, near Guadalaxara (Schaffner). 
149. EUTETRAS. 
Eutetras, A. Gr. in Proc. Amer. Acad. xv. p. 39. 
A diminutive shrubby monotype, endemic in Mexico. 
1. Eutetras palmeri, A. Gr. in Proc. Amer. Acad. xv. p. 40. (Tab. XLIII. 
fige. 6-13.) | 7 
North Mexico, region of San Luis Potosi, 6000 to 8000 feet (Palmer & Palmer, 
5204), Zacatecas (Coulter, 318). Hb. Kew. 
EXPLANATION OF TAB. XLIII. Fiec. 6-18. 
Fig. 6, portion of plant, nat. size; 7, a ray-flower; 8, a disk-flower; 9, a stamen; 10, style of a 
disk-flower; 11, a style of a ray-flower; 12,a scale of the pappus; 13, a bristle of the pappus : 
all enlarged. 
BIOL. CENT.-AMER., Bot. Vol. II., October 1881. 26 
