Spring Flora of Oklahoma 
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VI. LEUCELiENE Greene. 
Low, perennial herbs. Leaves oblanceolate, linear, or 
subulate. Heads solitary at the ends of the branches. 
Involucre turbinate, bracts imbricated in several series. 
Ray-flowers pistillate and fertile, ligules white, turning 
reddish. Disk-flowers perfect, white, tubular-funnel-form, 
5-toothed. Style-branches with ovate, obtuse appendages. 
Achenes long, flattened, hispidulous. Pappus a single se¬ 
ries of slender, rough, white bristles. 
1. Leucelene ericoidies (Torr.) Greene. Rose Heath Aster. 
Stems tufted from deep, woody roots, corymbosely branched, 3'-12' 
high, hispid or scabrous. Leaves hispid-ciliate, erect or slightly 
spreading, the lower and basal ones spatulate, 3"-6" long, the upper 
sessile, linear, or linear-spatulate. Heads terminating the branches, 
5"-8" broad. Involucre broadly turbinate, its bracts appressed, 
scarious-margined, imbricated in 3 or 4 series. Rays 12-15, white 
or rose, 2"-4" long. 
In dry soil. May-August. 
VII. ERIGERON L. 
.Branching or scapose herbs. Leaves alternate or basal. 
Heads corymbose, paniculate, or solitary, of tubular and 
radiate flowers. Involucre hemispheric or saucer-shaped, 
bracts imbricated in but one or two series. Receptacle 
nearly flat, naked. Ray-flowers white, violet or purple, 
pistillate. Disk-flowers yellow, perfect, 5-lobed. Achenes 
flattened, usually 2-nerved. Pappus-bristles fragile, slen¬ 
der, scabrous, in 1 series, or often an additional outer short 
series. 
Rays 100-150, narrow, mostly purple or violet. 
Pappus simple; plant erect, corymbosely branched. 
1. E. philadelphicus. 
Pappus double; plant diffusely branched, western. 
2. E. divergens. 
Rays much less numerous, purplish or white. 
Plants 5'-12' high, diffuse, western; pappus simple. 
3. E. Bellidiastrum. 
