Rudbeckia auriculata

(Perdue) Kral

Rhodora 77: 49. 1975.

Common names: Alabama or eared coneflower
EndemicConservation concern
Basionyms: Rudbeckia fulgida var. auriculata Perdue Rhodora 63: 119. 1961
Treatment appears in FNA Volume 21. Treatment on page 48. Mentioned on page 47.

Perennials, to 300 cm (rhizomatous, roots fibrous). Leaves green, oblong to elliptic or ovate to pandurate, herbaceous, margins crenate, dentate, entire or serrate, apices acute, faces scabrous, abaxial often glabrescent; basal petiolate, 20–65 × 8–20 cm, bases attenuate; cauline sessile, 15–40 × 4–15 cm, bases auriculate to truncate. Heads (usually 10+) in paniculiform arrays. Phyllaries to 1 cm. Receptacles conic to ovoid; paleae 4–6 mm, apices obtuse to acute, abaxial tips hairy. Ray-florets 8–14; laminae oblanceolate, 18–30 × 4–8 mm, abaxially sparsely hairy. Discs 12–16 × 10–18 mm. Disc-florets 150–200; corollas brown-purple, 3.5–4.2 mm; anther appendages glabrous or glanddotted; style-branches to ca. 1.8 mm, apices acute to obtuse. Cypselae 3.5–5 mm; pappi of 4–6, unequal scales, to 2 mm. 2n = 36.


Phenology: Flowering summer–fall.
Habitat: Sandy stream banks, wet roadsides
Elevation: 10–90 m

Discussion

Of conservation concern.

Rudbeckia auriculata is known from eight sites in Alabama, one in Florida, and one in Georgia.

Selected References

None.

Lower Taxa

None.

... more about "Rudbeckia auriculata"
glanddotted +  and glabrous +
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
paniculiform +
indeterminate +  and determinate +
Lowell E. Urbatsch +  and Patricia B. Cox +
(Perdue) Kral +
20 cm200 mm <br />0.2 m <br /> (65 cm650 mm <br />0.65 m <br />) +
8 cm80 mm <br />0.08 m <br /> (20 cm200 mm <br />0.2 m <br />) +
auriculate +  and truncate +
Rudbeckia fulgida var. auriculata +
compound +  and simple +
lobed;ovate;pandurate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
sessile +  and petiolate +
15 cm150 mm <br />0.15 m <br /> (40 cm400 mm <br />0.4 m <br />) +
4cm +  and 15cm +
Alabama or eared coneflower +
proximally yellow +  and yellowish green distally yellow or greenish +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.42 cm4.2 mm <br />0.0042 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 +
1.2 cm12 mm <br />0.012 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
10mm;18mm +
Ala. +, Fla. +  and Ga. +
10–90 m +
glaucous +, hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Sandy stream banks, wet roadsides +
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 +
18mm;30mm +
oblanceolate +
sessile +  and petiolate +
oblong;elliptic or ovate +
deltate +  and lance-linear +
serrate +, entire +  and dentate +
2-carpellate +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
persistent +
0 +  and 2 +
of 2-6 , unequal scales +  and coroniform +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Flowering summer–fall. +
3 +  and 21 +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
conic;ovoid +
connate +  and distinct +
4 +  and 6 +
unequal +
exalbuminous +
Endemic +  and Conservation concern +
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 auriculata +
Rudbeckia sect. Macrocline +
species +
cylindric +
serrate +, dentate +  and entire +
0 cm0 mm <br />0 m <br /> (300 cm3,000 mm <br />3 m <br />) +
shrub +  and subshrub +