Wilkesia.| COMPOSITAE, 219 
corneous, about 1“ long, consisting of 5 to 6 broad and acute but unequal 
paleae, which are concrete at st bases, that of the cibbighovics rapes 
truncate or reduced to one Hooker, Icon. Plant. 
Gray, Proc. Am. Ac. V, 136, ae Msept, U. S. E, E. bepress 
is a a Comp. "yar Mag. II, 163. 
Ha a Kea, Mauna Loa, Hualalai ; tie to 12000 ft. The «Ahinahina» of the 
iaiteta ae Pent ers tS of the foreigners. Flowers from July to Septemb. The lustrous 
rook er-gray down which thickly covers all ate makes this plant an object of great 
uty. 
8 var. macrocephalum. — Heads larger, 1—1!/2‘ in diam. Ray-fl. 20 to 
30, their ligules shorter. Appendages of — branches epee than in a. 
A, ren (as species), Gray, l. c. p. 137, and LI, — Mann, 
tnum. no. 
Maui! abs On the outside rim and in the bottom of the crater. «The tuft 
of silvery leaves from the short and thick stem is sometimes as much as four feet in 
dia G wi . t 
yess meena: the pappus of the disk-achenes as reduc o a narrow truncate 
coronula, ray- 7 but in my specimens all disk-achenes are crowned by 
a ca raat pat pappus, as in a. 
2. A. virescens, sp. n. — Somewhat smaller than the preceding species. 
Leaves hispid with short appressed hair, but green, the lower not exceeding 
12‘ in length by 1!/:—3” in width, the upper ones shorter and broader. 
Inflorescence a simple foliose raceme, the viscous-pubescent peduncles 
3—4‘ long, bearing 2 to 3 short linear bracts quite near the apex, each 
peduncle supported by a narrow leaf which exceeds it in length. Heads 
—9" in dia: Ray-fl. about 20, pale, the ligules shorter, 3“, and nar- 
rower, twice the length of their tubes. Achenes as before, those of the 
ray naked at the top, the paleae of the pappus in the disk-fl. narrower 
and a than in no. 1, the two outer ones much the longest, all soon 
deci uou 
Mitt: northern slope of Haleakala, from 8000 to 9000 ft. 
21. WILKESIA, Gray. 
Flower-heads homogamous, discoid, all florets hermaphrodite and fertile. 
True invol, wanting, together with the ray-florets, the disk surrounded 
only by the inner a shaped involucre of Argyroxiphium, made up of 
the connate, linear, I-seriate paleae of the receptacle, which is naked other- 
wise. Corollae eabalie animales 5-fid. Style bulbous at the base, 
its branches with conical or subulate appendages. Achenia as in Argy- 
roxiphium, the short pappus consisting of 6—12 unequal, slender, acute 
paleae. — Arborescent plants with the habit of a Yueca, the straight, 
undivided, medullary stem bearing a crown of whorled, ensiform, entire, 
coriaceous, longitudinally nerved leaves and gradually continuing in a 
large thyrsoid, resino-viscous raceme or panicle. Flowers yellow. 
A Hawaiian genus which may be considered as an io with elongate stem 
and suppression of ray-florets poles with their external involucr 
