CHENACTIS COMPOSIT | 357 
HULSEA. 
ligule, not surpassing the disk. Disk-flowers more numerous, 
their corollas small, with short proper tube, elongated narrow 
throat and 38-5 short erect teeth. Anthers included. Style- 
branches with short and linear glabrous stigmatic portion, and 
larger slender-subulate hispidulous appendage. Pappus nearly 
similar in ray and disk, of 3-5 rigid and wholly opaque paleace- 
ous naked awns, rarely obsolete 
R. leptocladus Gray 1.c. Stem slender, 6-12 inches high, paniculately 
or subcorymbosely branched: branches commonly filiform, elongated and 
leafless below, smooth, bearing solitary heads: leaves all alternate very 
narrowly linear, sessile, erect, entire, those of the branches near the heads, 
small and subulate: involucre 3 lines high: flowers yellow but often chang- 
ing to purple or whitish: palez of the pappus two-thirds the length of the 
achene, 3-5, rarely only 2or1ornone. . Dry plains east of the Cascade 
Mountains, Brit. Columbia to California. ; 
65 CHAENACTIS DC. Prodr. v, 659. 
Herbaceous or rarely suffrutescent plants with alternate most- 
ly pinnately dissected leaves and pedunculate solitary or some- 
times cymosely disposed heads of yellow white or flesh-colored 
flowers. Head discoid, but the marginal flowers commonly 
with enlarged limb to the corolla. Involucre many-flowered, cam- 
panulate or hemispherical, its bracts linear, erect, equal, herba- 
ceous to the tip. Receptacle flat. Corollas with short tube, long 
and narrow throat, and short teeth; or in the marginal ones of 
some species with larger lobes or even imperfect palmate ligules 
forming a kind of ray. Anthers mostly partly exserted. Style- 
branches pubescent nearly throughout, filiform or with attenu- 
ate-subulate tips. Ppappus of hyaline nerveless palee or none. 
C. Nevii Gray Proc. Am. Acad. xix, 30. Slender winter annual 4-10 
inches high, puberulent throughout: leaves 6-12 lines long, once or twice 
pinnately parted into linear-oblong divisions : heads rather short-peduncled: | 
involucre campanulate, 4-6 lines high, of 12-20 lanceolate acute or acum- 
inate herbaceous bracts: corollas yellow, the marginal ones but little larger 
than the others: achenes terete, clavate, surmounted by a short and thick 
obscurely denticulate crown, which is an epigynous disk ratber than pap- 
pus. Near Muddy Station, John Day valley Oregon. 
C. Cusickii Gray Syn. Fl. i, pt. 2, Supp. 452. Very low, diffusely 
branched, floccose-tomentose, soon glabrate : haves rather fleshy, all entire, 
spatulate-linear: peduncles short: bracts of the involucre broadly linear, 
midrib obscure: flowers white, the marginal ones enlarged: pappus of 10 
linear-oblong nearly equal pales about the length of the tube of the corolla. 
Sandy hills of the Malheur valley, Baker Co, Oregon. 
_ C. stevioides H. & A. Bot. Beech. 353, Floccose-tomentose. glabrate 
in age, seldom a foot high, freely and loosely branched, bearing numerous 
somewhat cymosely disposed heads of white flowers on short slender ped- 
uncles: leaves once or twice pinnately parted into short linear lobes, the 
uppermost rarely entire; bracts of the involucre narrowly linear, obtuse, 
with obscure midrib: marginal corollas with moderately enlarged unequal- 
ly 5-lohed limb, not age ponte the disk: pales of the pappus scarcely 
thickened at base, those of the inner flowers oblong-lanceolate and shorter 
than the corolla, of the outer ones ovate or oblong, often unequal, some- 
times much shorter. Southern Idaho to Nevada and Utah. 
