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.
Revision as of 22:58, 29 July 2020 by imported>Volume Importer
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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 +
acute;attenuate;acute;acute +
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 +
0.1 cm1 mm <br />0.001 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
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 />) +
2 cm20 mm <br />0.02 m <br /> (?) +  and 8 cm80 mm <br />0.08 m <br /> (?) +
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 />) +
80 cm800 mm <br />0.8 m <br /> (200 cm2,000 mm <br />2 m <br />) +
shrub +  and subshrub +