164 
COMPOSITE. 
[ Eupatorium . 
and near the summit of the Pouce. It is an erect herbaceous peren- 
nial, 2-3 feet high, with slender finely downy stems, few opposite dis- 
tinctly petioled crenate membranous deltoid leaves, small copious cam- 
panulate heads in crowded corymbs, linear equal subglabrous 2-3-serial 
involucral scales, a conical naked receptacle, flowers purplish about 
40 in a head, and minute angular cylindrical scabrous achenes much 
shorter than the biserial white bristly pappus. 
* E. triplinerve , Yahl, (E. Ayapana, Vent. ; DC. Prod. v. 169), a 
native of the valley of the Amazon, is cultivated and sometimes 
subspontaneous in Mauritius, to which it was brought by Captain 
Baudin in 1797, and Rodriguez. It is a slender glabrous erect 
perennial herb, with nearly sessile subentire linear leaves 2-3 in. long 
narrowed from the middle to both ends, small heads in very lax 
corymbose panicles, a flat receptacle and triserial linear involucral 
scales. Ayapana . 
* Pterocaulon Bojeri , Baker (Monenteles Pterocaulon, DC. Prod. v. 
455), a native of Madagascar, is said by Bojer to be established in 
Mauritius in fields round Port Louis. It is a much-branched wiry 
perennial, with the small distant entire sessile oblanceolate finely silky 
leaves decurrent as a continuous narrow wing to the branches, heads 
aggregated in copious round sessile clusters, a minute campanulate 
involucre of few linear acute pilose scales, flowers all tubular, with 
slender corollas, the outer female, a few inner hermaphrodite, a naked 
receptacle, tailed anthers, and very minute flattened pilose achenes 
with a pappus of copious soft white flexuose bristles. 
5. BLUMEA, DC. 
Heads heterogamous, many outer rows of flowers female, with slender 
corollas, a few inner hermaphrodite or male, with more open tubes. 
Involucre campanulate ; scales linear, acute, herbaceous, 2-3-serial. 
Receptacle naked, papillose. Anthers tailed at the base. Style- 
branches flattened. Achenes very minute, cylindrical-angular ; pappus 
of a single row of soft deciduous bristles. — Herbs with alternate leaves 
and very copious heads in terminal panicles. Distrib. Tropics of the 
Old World, principally Asia. Species about 100. 
1. B. lacera, DC. Prod. v. 436. An erect annual, 1-4 feet high, 
with finely pilose stems. Leaves distinctly petioled, 2-3 in. long, 
oblong, obtuse, cuneate at the base, rather repand, with abundant 
minute sharp teeth, finely downy below. Head? in dense panicles, 
with short glandular-pilose branches ; the upper crowded above the 
leaves, the lower distant, springing from the axils of large leaves. In- 
volucre -jt-i in. long, scales 2-3-serial, linear, pilose. Achenes in. 
long, glabrous ; pappus £ in. long, of fine white brittle flexuose setae. 
B. axillaris, DC. Prod. v. 434. B. Wightiana, DC. loc. cit. 
Mauritius, in waste ground. Throughout Tropical Asia and Africa. 
