Rudbeckia occidentalis

Nuttall

Trans. Amer. Philos. Soc., n. s. 7: 355. 1840.

Common names: Western coneflower
Endemic
Treatment appears in FNA Volume 21. Treatment on page 51. Mentioned on page 47.

Perennials, to 200 cm (rhizomatous, roots fibrous). Leaves: green, blades broadly ovate to lanceolate (rarely lobed), herbaceous, bases attenuate to cuneate or broadly rounded, ultimate margins entire or serrate, apices acute, faces sparsely to densely hairy (mostly adaxially), rarely glabrous; basal petiolate, 12–30 × 3–9 cm; cauline petiolate or sessile, 5–25 × 2–10 cm. Heads in ± corymbiform arrays. Phyllaries to 3 cm (margins mostly ciliate, hairy, especially abaxially). Receptacles ovoid to columnar; paleae (proximally light-brown, distally green, becoming maroon with age) 5–7 mm, apices acute to acuminate, abaxial tips densely hairy. Ray-florets 0. Discs 17–45 × 12–20 mm. Disc-florets 200–500+; corollas yellowish green proximally, blackish maroon distally, 4–6 mm; style-branches ca. 1.2 mm, apices acute to rounded. Cypselae 3.5–5 mm; pappi coroniform, to 1.2 mm. 2n = 36.


Phenology: Flowering summer–fall.
Habitat: Open meadows, streamsides, seeps
Elevation: 1000–2800 m

Distribution

V21-105-distribution-map.gif

Calif., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.

Discussion

Rudbeckia occidentalis is sometimes grown as an ornamental.

Selected References

None.

Lower Taxa

None.

... more about "Rudbeckia occidentalis"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Lowell E. Urbatsch +  and Patricia B. Cox +
Nuttall +
12 cm120 mm <br />0.12 m <br /> (30 cm300 mm <br />0.3 m <br />) +
3 cm30 mm <br />0.03 m <br /> (9 cm90 mm <br />0.09 m <br />) +
attenuate +  and cuneate or broadly rounded +
compound +  and simple +
broadly ovate;lanceolate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
sessile +  and petiolate +
sessile +  and petiolate +
5 cm50 mm <br />0.05 m <br /> (25 cm250 mm <br />0.25 m <br />) +
2cm +  and 10cm +
Western coneflower +
blackish maroon +  and yellowish green +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
hairy +  and glabrous +
flattened +, fusiform-terete +  and obpyramidal +
fertile +  and bisexual +
6 cm60 mm <br />0.06 m <br /> (8 cm80 mm <br />0.08 m <br />) +
fertile +  and bisexual +
1.7 cm17 mm <br />0.017 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
12mm;20mm +
Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
1000–2800 m +
glabrous +  and hairy +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Open meadows, streamsides, seeps +
discoid +  and radiate +
in loose , corymbiform to paniculiform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.1 cm1 mm <br />0.001 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
fusiform;turbinate or broadly campanulate +
sessile +  and petiolate +
deltate +  and lance-linear +
dentate to pinnatifid or palmatifid +  and entire +
2-carpellate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
persistent +
0 +  and 2 +
coroniform +
0 cm0 mm <br />0 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
Flowering summer–fall. +
3 +  and 21 +
0 cm0 mm <br />0 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Trans. Amer. Philos. Soc., n. s. +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
ovoid;columnar +
connate +  and distinct +
2 +  and 6 +
unequal +
exalbuminous +
purplish +, bluish green +  and green +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Rudbeckia subg. Macrocline +
Rudbeckia occidentalis +
Rudbeckia sect. Macrocline +
species +
cylindric +
0 cm0 mm <br />0 m <br /> (200 cm2,000 mm <br />2 m <br />) +
shrub +  and subshrub +