(157) 
Involucre hemispheric or broadly campanulate ; scales in several 
series, the outer foliaceous and spreading, ea nter aca and inner 
anthers aaa obtuse at “he eae aehenes ribbed; pappus- 
bristles few to many, short, caducous. Herbaceous, diffusely 
branching, with petioled serrate leaves; heads peduncled, usually 
terminating the branches 
ype, C. punctatum Cie 
Twelve species, according to Hoffmann, most of which are Old 
World forms, and probably not congeneric with the four or five 
New World species. In America Centratherum is characteristic 
of tropical South America, and none of the species extends much 
beyond it. 
Inner scales obtuse or rounded at the apex, ciliate-denticulate with glandu- 
ar hairs and more or less glandular on the back. . intermedium, 
Inner scales rounded to aristate, the margin minutely Manaus or not at all, 
arachnoid or tomentose on the back. 
Inner scales obtuse or acute, mucronate or aristate, the intermediate 
with awns 2 mm, or more in length. . C. punctatum. 
Inner pa opniee 6 or rounded, the intermediate Sith awus less than 
long or none. 3. C. muticum. 
1. CENTRATHERUM INTERMEDIUM (Link) Lessing, 
Linnaea 4: 320. 1829 
Amphirephis intermedia Link, Abb. K. Bot. Gart. Berlin. 65. 
1820. 
Spixta violacea Schrank, Pl. Rar. Hort. Monac. pl. 80. 1821. 
Erect, with ascending branches, 3-5 dm. high; stem stout, 
obl 
margined petiole; length of blade and petiole 3-4 cm., width 1-1.8 
head i 
acute at the tip, ciliate with short glandular hairs and somewhat 
glandular on the back; achenes obovoid, prominently ribbed. 
Type locality: Brazil. 
Distribution: Martinique, Duss 277¢, and Guadeloupe, Duss 
2526, to Brazil. 
