382 Compositaceae 
Subgenus PETRADORAE—Glabrous; stems simple, |—2 dm. high (ours). 
Leaves entire, 3-veined. Heads radiate, few to several-flowered, in corymbs; involucre- 
bracts with small green tips, rigid, erect, somwhat keeled. Ray-flowers few. Akenes 
glabrous. E. (Petradoria pumila.) 
A. pumila Nutt. 
ERICAMERIA FALSE HEATHER 
Herbs or shrubby plants (ours), perennial, glabrous, somewhat viscid; ours 5-20 
cm. high, much branched. Leaves alternate, sessile; in ours spatulate to filiform, 6—25 
mm. long, entire, many. Heads radiate, about | cm. high (ours), several-flowered, in 
corymbs; involucre narrowly campanulate to oblong; bracts imbricated in several series, 
acute or acuminate (ours), lanceolate, with scarious margins; receptacle flat, pitted. 
Ray-flowers 4—6: corolla yellow. Disk-flowers 8—12: corolla yellow. Akenes cylin- 
dric, hairy when young. (Erica is a genus of heather, Gk. meros=a part; because 
the leaves are heather-like.) E. (Chrysothamnus resinosus; Chrysothamnus nanus. ) 
E. nana Nutt. 
CHRYSOTHAMNUS RABBIT-BRUSH 
Herbs or shrubby plants, perennial, glabrous to white-tomentose, often viscid. Leaves 
alternate, oblong or narrower, entire or merely scabrous, sessile, 3-veined (ours). Heads 
rayless or rarely radiate, in racemes or panicles or cymes, involucre campanulate to ob- 
long; bracts 3—5 sometimes indistinct vertical rows, coriaceous, mostly scarious but 
sometimes partly green; receptacle flat, pitted. Ray-flowers none except in C. bloomeri; 
corolla yellow. Disk-flowers 5—30: corolla yellow. Akenes narrow, terete or slightly 
angled, pubescent (ours). Pappus-bristles capillary, usually dull-white. (Gk. chry- 
sos—gold, thamnos=a shrub; shrubby plants with yellow flowers. ) 
A. Branches glabrous; leaves glabrous tho often viscid. 
B. Involucre-bracts attenuate, acute, the outer abruptly narrowed to a subulate 
green tip; plant 3—6 dm. high; rays O—4. 
C. bloomeri Gr. 
a3 Involucre-bracts obtuse to acutish, the outer not with a subulate green tip; rays 
C. Heads few; plant 1—3 dm. high; leaves often inrolled. E. 
C. pumilus Nutt. 
CC. Heads many; plant 5—20 dm. high; leaves flat. E. 
C. viscidiflorus Nutt. 
AA. Branches puberulent to tomentose; rays 0. 
D. Branches ashy-pubescent; plant 1—4 dm. high. E. (C. lanceolatus; C. 
puberulus. ) C. viscidiflorus lanceolatus Gr. 
DD. Branches white-tomentose; plants 4—15 dm. high. 
E. Plant narrow with somewhat erect branches; leaves minutely white tomentose; 
outer involucre-bracts tomentose on the back. E. (C. speciosus albicaulis. ) 
C. nauseous Brit. (Fetid Rabbit-brush) 
EE. Plant wide with mostly spreading branches; leaves glabrous; outer involucre- 
bracts glabrous. E. (C. speciosus; C. graveolens. ) 
C. nauseous graveolens Pip. 
BELLIS DAISY 
Herbs, tufted; ours perennial, acaulescent. Leaves alternate, all basal, entire or 
obscurely dentate; in ours pubescent, spatulate. Heads radiate, terminal on scapes, 
