Eclipta.| COMPOSITAE. 203 
12, ACANTHOSPERMUM, Schrank. 
Heads heterogamous, radiate. Invol. bracts herbaceous in one row. 
Receptacle small, ecnieak paleaceous, the outer paleas bearing hooked 
with short tube and campanulate b-fid 
Style of disk-florets undivided. Achenes compressed, without pappus, 
enclosed by the prickly paleas. — Diffuse branching annuals with opposite 
leaves, which are glandular beneath. Heads small, solitary and subsessile 
at the ends or in the forks of the branches. Flowers yellow. 
Two species of tropical America. 
v1. A, Brasilum, Schrank, Pl. Rar. Hort. Monac. I, 53. — as wae 
Leaves ovate or obovate, toothed or almost entire, Sites Ray-florets 
th 
Outer paleas (enveloping the achene) furrowed, armed with soft a 
prickles, pipaee; not beaked at the top. — A. aka and A. hirsutum, 
DC. Prod. V, 521 & 522. 
Kauai (U. S. E. E. and Wawra). 
13. ECLIPTA, L. 
Heads heterogamous, radiate. Invol. bracts in two rows, broad, almost 
leafy. Receptacle flattish, the outer paleas folding round the achenes, 
the inner very narrow or wanting. Ray-florets in two rows, female, 
shortly ligulate, the ‘Mes entire or 2-toothed. Disk-florets hermaphro- 
dite, fertile, tubular, 4—5-toothed. Style-branches of disk-florets linear- 
flattened, obtuse. Achenes of the ray triangular, of the disk flattened. 
Pappus none or reduced to a border of minute teeth. — Diffuse herbs 
with opposite leaves. Heads single or twin at the ends of the branches 
or in their forks. 
A genus of 4 species, 3 American and 1 Australasian. 
71. E. alba, Hassk. — Mig. Fl. Ned. Ind. II, 65. — «A branching 
annual, usually prostrate and creeping, sometimes ascending or erect, 
1 ft. long or more, sprinkled with closely appressed short hairs. Leaves 
Shortly stalked, from nearly ovate to oblong-lanceolate or almost linear, 
1—2‘ long, Ssinseols toothed to nearly entire. Peduncl . 
length, the single flower-head about 3” in diameter. Ray-tl 
white.» — Benth. Fl. Hongk. p. 181. — Verbesina alba, L. — E. erecta 2 
E. prostrata, L. and the whole section Eueclipta of DC. Prod. V, 
Along water courses near agen of recent introduction, A common weed through- 
out the warm er regions of the glo 
