Ericameria discoidea

(Nuttall) G. L. Nesom

Phytologia 68: 153. 1990.

Common names: Whitestem goldenbush sharp-scale goldenweed
IllustratedEndemic
Basionym: Macronema discoidea Nuttall Trans. Amer. Philos. Soc., n. s. 7: 322. 1840
Synonyms: Haplopappus macronema A. Gray
Treatment appears in FNA Volume 20. Treatment on page 58. Mentioned on page 52, 59, 62, 68.

Plants 10–40 cm. Stems erect to spreading, abundantly branched, twigs green when young, concealed by whitish, pannose tomentum, sporadically stipitate-glandular. Leaves ascending to spreading; blades linear or oblong to oblanceolate (flat), 10–35 × 2–7 mm, midnerves evident (1–2 fainter, collateral nerves often present), (margins often undulate) apices acute to obtuse, usually apiculate, faces usually stipitate-glandular, resinous; axillary fascicles absent. Heads borne singly or in cymiform to racemiform arrays. Peduncles 3–15 mm (bracts 0–3, reduced, leaflike, whitish tomentose and usually stipitate-glandular). Involucres obconic, 9–13 × 6–10 mm. Phyllaries 12–17 in 2–3 series, green to tan, lanceolate to oblong, 6–10 × 1–2 mm, subequal, outer herbaceous or distally so, inner mostly chartaceous, midnerves evident, (margins of outer often distally stipitate-glandular, of inner narrowly membranous, sometimes minutely ciliolate) apices acute to attenuate, abaxial faces stipitate-glandular. Ray-florets 0. Disc-florets 10–26; corollas 9–11 mm. Cypselae brownish, narrowly oblong to narrowly ovoid, 5–6 mm, villous; pappi tan, 8.5–11 mm. 2n = 18.


Phenology: Flowering late summer–fall.
Habitat: Rocky, open or sparsely wooded slopes, often in coarse talus
Elevation: 2500–3800 m

Distribution

V20-90-distribution-map.gif

Calif., Colo., Idaho, Mont., Nev., Oreg., Utah.

Discussion

Ericameria discoidea is common in the Rocky Mountains.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Ericameria discoidea"
stipitate-glandular +
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
cymiform +  and racemiform +
indeterminate +  and determinate +
Lowell E. Urbatsch +, Loran C. Anderson +, Roland P. Roberts +  and Kurt M. Neubig +
(Nuttall) G. L. Nesom +
decurrent +
Macronema discoidea +
compound +  and simple +
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
oblong;oblanceolate +
2mm;7mm +
rugulose +  and muricate +
tan +  and reddish +
subequal +
Whitestem goldenbush +  and sharp-scale goldenweed +
not 2-lipped +  and actinomorphic +
0.9 cm9 mm <br />0.009 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
narrowly oblong +  and narrowly ovoid +
fertile +  and bisexual +
fertile +  and bisexual +
Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +  and Utah. +
2500–3800 m +
resinous +
gland-dotted;gland-dotted +
stipitate-glandular +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Rocky, open or sparsely wooded slopes, often in coarse talus +
thyrsiform +, paniculiform +, branched +, racemiform +, cymiform +, discoid +  and radiate +
in cymiform to racemiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.9 cm9 mm <br />0.009 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
sessile +  and petiolate +
erect;spreading or reflexed +
deltate +  and triangular +
distally +  and herbaceous +
2-carpellate +
persistent +
0.85 cm8.5 mm <br />0.0085 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Flowering late summer–fall. +
green +  and tan +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
lanceolate +  and oblong +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
Illustrated +  and Endemic +
resinous +
gland-dotted +
erect +  and spreading +
lanceolate +  and subulate +
appendaged +  and truncate +
papillate +  and smooth +
Haplopappus macronema +
Ericameria discoidea +
Ericameria +
species +
campanulate +
stipitate-glandular +
perennial +, biennial +  and annual +