Campylotheca.| COMPOSITAE. 211 
deciduous awns or teeth. — Shrubs or suffruticose herbs, glabrous, with 
opposite simple or variously pinnatisect leaves, and aac flowers. Heads 
single on a terminal peduncle or in cymes or corym — The inner in- 
volucral bracts represent the paleae of the sterile ray- diaaé 
opsis. 
a compact group and cannot well be 
nal : 
genus Campylotheca, thus uniting the two most prominent charact Bidens and 
is — barbed a n mes — ns unless 
genera shall coalesce in one of e limits, while by the twisting of the achenes, 
the limited number of the presence of glands in the involucral s ral 
species, and the tubular or urceolat tary round the base of the style, distinctive 
ch. ts of minor impor are furnish This nectary, which seems nt 
in all speci d remains visible for a long time as a pale arid small cup at the apex 
w shallow disk or annulus in those species of Bidens 
which I have had an opportunity to examine. 
The plants, when bruised, emit a peculiar carroty odor, and several species are employed 
ific remedies by the natives, who know them by the generic name «Kokolau>. 
as sudorific 
Leaves undivided : 
Inflorescence a single-headed sepiggl 1 Molokaiensis. 
cack 5 —b5-headed ¢ 5 Semmens. | €. dichotoma. 
Inflorescence a many-flowered pasiicdlate corymb : : : 7. C. Hawaiiensis. 
and var. 8 of 9. C. macrocarpa. 
Leaves — into 3 to 7 leaflets: 
Infio le-headed peduncel 
e ; Imature achenes awnless 2. C. pulchella 
ets eo es with b: 3, ¢ Ro t. 
Leaflets 5; flowers very large, 13/2 6. C. cosmot 
aflets abe ha ome into Ree cuneate ‘segments 5. C, Mauiensis. 
or. & many-flowe 
ets 5—3, petiolat 9. C. macrocarpa 
Leaflets 5—3, sessile : 
Co: not exserted beyond the leaves; heads large; ach 
scree awns; leaflets spinuloso-serrate, poser 
8. C. Sandwicensis. 
eate 
Corymb projee tng beyond the leaves; heads small: 
i arrow-lanceolate, rhomboidal, serrate 
Leaflets un 5 
only at age dal ; . U1. GC. micrantha. 
ets p natisect ‘slo ‘entire linear segments. : . 12. C. Menziesti. 
Inflor. an dailies e panicle . 10. C. grandifiora. 
a. Adenolepis. Low, sshinteate, with ore pintiiestniel branches. Inflor. 
a single peduncle or a simple cyme. Invol. bracts often tipped with a 
terminal gland. 
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