216 COMPOSITAE. [ Bidens. 
11. C."micrantha, Cassin. — DC. Prod. V, 593. — Suffruticose, with 
reddish stem, 2—3 ft. high, resino-puberulous. Leaves on petioles of 
1—1!/2', pinnatisect into 7, 5 and 3 leaflets, the uppermost ones simple. 
petiolate, narrow elliptico-lanceolate or rhomboidal, 1!/2—3/ * 1/4—1/2‘, 
acutely dentate or serrate about the middle, but entire at the long drawn 
out apex and the narrowly contracting base. Inflor. a dense and broad, 
many-flowered, foliolose corymb, the ultimate pedicels less than 1”. 
Heads small, 2", the resino- pubescent invol. as high or less. Ray-fl, 
3 to 5, obovate, 3” long. Disk-fl. 6—10. Achenes linear, 4—6", indis- 
tinetly or not at all ‘iatpinee, straight or twisted, setulose at the ‘iiacate 
and apex, biaristate with retrorsely ciliate awns, or oftener awnless. — 
Bidens micrantha, Gaud. in Bot. Freye. V, 64, 85. — Coreopsis 
micrantha, Gray, l. e. — Campyloth. ausiraha: Less. in Linnaea, VI, 509. 
awaii! Central Plateau, Waimea. — To a plant of this species with mostly beeic 
and simple leaves will have to be referred the var. 6 of Bidens poet eller x Gra, 
® var. laciniata. — Leaves broader, more deeply serrate, even laciniate 
about the see. : Heads fies 3—4", Ray-fl. 5—7.". Achenes generally 
= hooked awn 
ui! Honuaula, ees Wailuku; Hawaii! 
; var. — Leaflets mostly 3, their apex and base less drawn out, the 
serratures less deep. Heads very small, 1—2“. Ray-fl. 2-3”. Achenes 
mostly awnless, with a setulose corona. 
Oahu! Kaala, and Waianae Tange. ee specimens have pote larger flowers and 
might pass for C. S were not for their copious and projecting inflorescence. 
12. C. Menziesii Pate uae Gray, 1. e. — Habit, size and infl. of 
C. micrantha. Leaves on petioles of 2‘, bipinnatisect with 3, 2 
or 1 pairs of primary ‘cist asc these entire and 2” broad or again 
more or less deeply cut into lobes or linear-lanceolate segments. Inyol. 
I'/2", Ray-fl. 5, about 4“ long. Disk-fl. 6—10. Achenes 4—6”, linear, 
pores margined, straight or twisted, quite glabrous and bidentate or 
awnles 
a cei Kalae. 
6 var. — Leaves 2‘ long. Primary segments cut to the rhachis; secondary 
segments 1” broad, with often one or more prominent teeth 
E. Maui! Hawaii! Kohola, Waim 
~ var. — Secondary ee ee rhachis filiform 
Hawaii! Central Plateau, where it covers large patches of er with lively yellow. 
18. BIDENS, L. 
Heads radiate or sometimes discoid. Disk- florets tubular. Epigynous 
disk round the base of the style low annular. Achenes always straight, 
not margined, either compressed, short and broad, or 4-angled, elongate, 
