192 COMPOSITAE. { Adenostemma. 
Achenes cylindrical, scarcely striate, hairy. Pappus white, the outer 
row very short and sometimes reduced to a few bristles. — Fl. Hongk. p. 169. 
eau Honolulu and elsewhere, of late introduction. A common weed in China 
and Ind 
TriBE Il. EHUPATORIEAE. 
Heads discoid. Anthers almost entire at the base. Style-branches 
elongate, obtuse and usually thicker upwards. Leaves opposite, rarely 
lternate. 
2. ADENOSTEMMA, Forst. 
Heads campanulate or hemispherical. Invol. bracts imbricate in 2 rows, 
nearly equal, herbaceous, rarely connate into a many-toothed cup. Receptacle 
naked. Tube of corolla short, the limb campanulate, 5-toothed. Anthers 
truncate, the connective often ending in a small gland. Achenes obovoid, 
a 
bristles, each tipped with a globular gland. — Viscous-hairy or glabrous 
perennials, with opposite, often triplinerved, almost entire leaves. Flowers 
small, bites in loose corymbose panicles. 
of few American species, _of which the following is spread over many wart 
aaa 
1, A. viscosum, Forst. — DC. Prod. V, 111. — Stem erect or ascending, 
rooting at the base, glandular-pubescent, 1—-2 ft. high. Leaves ear 
ovate to deltoid and decurrent into the petiole, or thom boida 6’ x 
1'/2—3', thin, coarsely toothed or serrate, on a margined ae of ‘Js 
1‘, seabrous or papillose-hispid on both faces. Heads ‘iecauseneal about 
3” in diameter, in a loose-spreading di-trichotomous panicle with very 
small leaves kdas the branches. Pedicels 1/2‘ or more, Invol. bracts 
oblong. Florets numerous, often hispid. Achenes more or less muricate. 
— Fil. Hongk. p. 171. — Lavenia glutinosa, Gaud. in Bot. Freye. . 471. 
Common in es lower roads of all islands, Nat. name: «Kamanamana». in- 
fusion en ioe leaves is used as a remedy in fevers by the natives. The pose is widely 
spread over America, pobiaeta N. Australia, Asia and Africa 
3. AGERATUM, L. 
8 as before. Invol. bracts in 2 or 3 rows, linear, of about equal 
length. rigdug flat, naked or bearing a few caducous paleas. Corolla 
tube scarcely distinct from the short 5-toothed limb. Anthers 
tia heel at the top. Achenes 5-angled. Pappus of 5 or 10 (rarely 
10—20) chaffy scales or bristles, dilated and sometimes connate at the 
— Erect herbs or shrubs. sbawer leaves opposite, the upper alter 
wide: Heads small, with blue, purple or white florets, i in dense corymbs 
or loose panicles. 
pees ae 16 American species, 
