Common names: Cooper’s goldenbush
Endemic
Treatment appears in FNA Volume 20. Treatment on page 56.

Plants 20–120 cm. Stems green when young, fastigiately branched, puberulent, gland-dotted (in pits), resinous. Leaves ascending to spreading; blades linear to narrowly obovate (terete to adaxially sulcate), (0.5–) 10–15 × 0.5–1 mm, midnerves not evident, apices acute, faces puberulent, regularly gland-dotted (in circular, deep pits), resinous; axillary leaf fascicles present proximally, shorter than subtending leaves. Heads in rounded, cymiform arrays (2–9 cm wide). Peduncles 5–15 mm (bracts 0–2). Involucres narrowly campanulate, 4–5 × 3–4 mm. Phyllaries 10–14 in 3–4 series, tan, sometimes greenish subapically, ovate to oblong, 2.5–5 × 0.6–1.5 mm, unequal, mostly chartaceous, midnerves evident, subapically expanded, (margins scarious or narrowly membranous, entire, ciliolate) apices erect, acute to obtuse, abaxial faces usually glabrous, sometimes (outer) sparsely puberulent and/or resinous. Ray-florets (0–) 1–3; laminae elliptic, 4–6 × 1–2 mm. Disc-florets 4–12; corollas 3–5 mm. Cypselae tan to brown, turbinate, 3–3.5 mm, sericeous; pappi silvery tan, 3–5 mm. 2n = 18.


Phenology: Flowering spring–early summer.
Habitat: Common in rocky desert basins, washes, desert slopes and mesas in creosote-scrub and Joshua tree woodlands
Elevation: 800–2000 m

Discussion

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

puberulent +  and glabrous +
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
rounded +
Lowell E. Urbatsch +, Loran C. Anderson +, Roland P. Roberts +  and Kurt M. Neubig +
(A. Gray) H. M. Hall +
decurrent +
Bigelowia cooperi +
compound +  and simple +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (1 cm10 mm <br />0.01 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
linear;narrowly obovate +
0.5mm;1mm +
rugulose +  and muricate +
tan +  and reddish +
subequal +
Cooper’s goldenbush +
not 2-lipped +  and actinomorphic +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
tan +  and brown +
turbinate +
fertile +  and bisexual +
fertile +  and bisexual +
Calif. +  and Nev. +
800–2000 m +
resinous +
gland-dotted +
puberulent +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Common in rocky desert basins, washes, desert slopes and mesas in creosote-scrub and Joshua tree woodlands +
thyrsiform +, paniculiform +, branched +, racemiform +, cymiform +, discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
campanulate +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
sessile +  and petiolate +
erect;spreading or reflexed +
deltate +  and triangular +
evident +  and not evident +
2-carpellate +
silvery tan +
persistent +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Flowering spring–early summer. +
greenish +  and tan +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
ovate +  and oblong +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Univ. Calif. Publ. Bot. +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
resinous +
gland-dotted +  and green +
usually erect +  and ascending +
lanceolate +  and subulate +
appendaged +  and truncate +
papillate +  and smooth +
Haplopappus cooperi +
Ericameria cooperi var. cooperi +
Ericameria cooperi +
variety +
campanulate +
perennial +, biennial +  and annual +