Perennials, 50–300 cm (rhizomes often elongate, slender, plants colonial, roots fibrous). Leaves green, blades broadly ovate to lanceolate, all but distalmost 1–2-pinnatifid or pinnately compound, leaflets/lobes 3–11, bases cuneate to attenuate or cordate, margins entire or dentate, apices acute to acuminate, faces glabrous or hairy (sometimes with translucent patches); basal (often withering before flowering) petiolate, 15–50 × 10–25 cm; cauline petiolate or sessile, mostly lobed to pinnatifid, sometimes not lobed, 8–40 × 3–20 cm. Heads (2–25) in loose, corymbiform arrays. Phyllaries to 2 cm (8–15, ovate to lanceolate, margins mostly ciliate, glabrous or hairy). Receptacles hemispheric or ovoid to globose; paleae 3–7 mm, apices (at least of proximal) truncate or rounded, abaxial tips densely hairy. Ray-florets 8–12; laminae elliptic to oblanceolate, 15–50 × 4–14 mm, abaxially hairy. Discs 9–30 × 10–23 mm. Disc-florets 150–300+; corollas yellow to yellowish green (lobes yellow), 3.5–5 mm; style-branches 1–1.5 mm, apices acute to rounded. Cypselae 3–4.5 mm; pappi coroniform or of 4 scales, to 1.5 mm.

Distribution

V21-95-distribution-map.gif

B.C., Man., N.B., N.S., Ont., P.E.I., Que., Ala., Ariz., Ark., Colo., Conn., Del., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Mass., Md., Mich., Minn., Miss., Mo., Mont., N.C., N.Dak., N.H., N.Mex., N.Y., Nebr., Ohio, Okla., Pa., S.C., S.Dak., Tenn., Tex., Va., Vt., W.Va., Wis., Wyo.

Discussion

Varieties 5 (5 in the flora).

Cultivars of Rudbeckia laciniata are grown as ornamentals. The cultivar ‘golden-glow’ is widely planted and occasionally escapes cultivation. Among the varieties traditionally recognized in floristic treatments, vars. ampla and heterophylla are the most distinctive. Detailed investigation may show that the other varieties, from eastern North America, represent broadly intergrading forms that should be subsumed under var. laciniata.

Selected References

None.

Key

1 Receptacles ovoid; discs (17–)20–30 mm; w of Great Plains Rudbeckia laciniata var. ampla
1 Receptacles globose or hemispheric; discs 10–20 mm; Great Plains and e United States > 2
2 Basal and proximal cauline leaves not lobed, adaxial faces moderately to densely hairy; Levy County, Florida Rudbeckia laciniata var. heterophylla
2 Basal and proximal cauline leaves lobed, adaxial leaf faces sparsely hairy or glabrous; e North America (not Levy County, Florida) > 3
3 Proximal leaves usually with 0, 3, or 5 lobes; se United States Rudbeckia laciniata var. digitata
3 Proximal leaves usually 1–2-pinnatifid or with 5–11 lobes; e North America (not se United States). > 4
4 Proximal cauline leaves 2-pinnatifid, mid cauline leaves 5–11-lobed; paleae 3.1–4.1 mm; cypselae 3.5–4 mm; pappi 0.7–1.5 mm Rudbeckia laciniata var. bipinnata
4 Proximal cauline leaves pinnatifid, mid cauline leaves 5–9-lobed; paleae 4.4–6.1 mm; cypselae 4.2–6 mm; pappi 0.1–0.7 mm 7e. Rudbeckia laciniata var. laciniata undefined
... more about "Rudbeckia laciniata"
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 +
Linnaeus +
15 cm150 mm <br />0.15 m <br /> (50 cm500 mm <br />0.5 m <br />) +
10 cm100 mm <br />0.1 m <br /> (25 cm250 mm <br />0.25 m <br />) +
cuneate +  and attenuate or cordate +
compound +  and simple +
broadly ovate;lanceolate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
sessile +  and petiolate +
sessile +  and petiolate +
8 cm80 mm <br />0.08 m <br /> (40 cm400 mm <br />0.4 m <br />) +
lobed +, mostly lobed +  and pinnatifid +
3cm +  and 20cm +
Cutleaf coneflower +
yellow +  and yellowish green +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 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 +
0.9 cm9 mm <br />0.009 m <br /> (3 cm30 mm <br />0.03 m <br />) +
10mm;23mm +
B.C. +, Man. +, N.B. +, N.S. +, Ont. +, P.E.I. +, Que. +, Ala. +, Ariz. +, Ark. +, Colo. +, Conn. +, Del. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Mass. +, Md. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, N.C. +, N.Dak. +, N.H. +, N.Mex. +, N.Y. +, Nebr. +, Ohio +, Okla. +, Pa. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Va. +, Vt. +, W.Va. +, Wis. +  and Wyo. +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
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 +
15mm;50mm +
elliptic +  and oblanceolate +
4mm;14mm +
sessile +  and petiolate +
deltate +  and lance-linear +
dentate +  and entire +
2-carpellate +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
persistent +
0 +  and 2 +
of 4 scales +  and coroniform +
0 cm0 mm <br />0 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
3 +  and 21 +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
ovoid;globose +
connate +  and distinct +
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 laciniata +
Rudbeckia sect. Macrocline +
species +
cylindric +
serrate +, dentate +  and entire +
50 cm500 mm <br />0.5 m <br /> (300 cm3,000 mm <br />3 m <br />) +
shrub +  and subshrub +