Rudbeckia glaucescens

Eastwood

Leafl. W. Bot. 2: 55. 1937.

Common names: Waxy coneflower
Endemic
Synonyms: Rudbeckia californica var. glauca S. F. Blake
Treatment appears in FNA Volume 21. Treatment on page 48. Mentioned on page 47.

Perennials, to 150 cm (roots fibrous). Leaves bluish green (heavily glaucous), blades lanceolate to elliptic (not lobed), leathery, bases attenuate, margins entire or remotely serrulate, apices acute, faces glabrous; basal petiolate, 20–50 × 4–10 cm; cauline petiolate or sessile, 10–25 × 2–8 cm. Heads borne singly or (2–10) in ± corymbiform arrays. Phyllaries to 1.5 cm. Receptacles conic to columnar; paleae 4–6.5 mm, apices acute, often attenuate, abaxial tips hairy. Ray-florets 7–15; laminae elliptic to oblong, 25–40 × 8–14 mm, abaxially hairy. Discs 15–35 × 14–22 mm. Disc-florets 250–400+; corollas yellowish green, 3–4 mm; style-branches ca. 1 mm, apices acute. Cypselae 4–5.5 mm; pappi coroniform or of ± connate scales, to 1.2 mm. 2n = 36.


Phenology: Flowering summer–fall.
Habitat: Meadows, seeps, streamsides
Elevation: 60–1300 m

Discussion

Rudbeckia glaucescens often grows on serpentine and often with Darlingtonia.

Selected References

None.

Lower Taxa

None.

... more about "Rudbeckia glaucescens"
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 +
Eastwood +
20 cm200 mm <br />0.2 m <br /> (50 cm500 mm <br />0.5 m <br />) +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
attenuate +
compound +  and simple +
lanceolate;elliptic +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
sessile +  and petiolate +
sessile +  and petiolate +
10 cm100 mm <br />0.1 m <br /> (25 cm250 mm <br />0.25 m <br />) +
2cm +  and 8cm +
Waxy coneflower +
yellowish green +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 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 +
1.5 cm15 mm <br />0.015 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
14mm;22mm +
Calif. +  and Oreg. +
60–1300 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Meadows, seeps, streamsides +
discoid +  and radiate +
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 +
25mm;40mm +
elliptic +  and oblong +
8mm;14mm +
sessile +  and petiolate +
bluish green +
deltate +  and lance-linear +
serrulate +  and entire +
2-carpellate +
0.4 cm4 mm <br />0.004 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
persistent +
0 +  and 2 +
of more or less connate scales +  and 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 /> (1.5 cm15 mm <br />0.015 m <br />) +
Leafl. W. Bot. +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
conic;columnar +
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 californica var. glauca +
Rudbeckia glaucescens +
Rudbeckia sect. Macrocline +
species +
cylindric +
serrate +, dentate +  and entire +
0 cm0 mm <br />0 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
shrub +  and subshrub +