Rudbeckia fulgida
orange coneflower, showy coneflower
glabrous or moderately hirsute (branches spreading).
blades lanceolate to broadly ovate or elliptic (not lobed), herbaceous, bases attenuate to cordate, margins usually entire or serrate, sometimes lacerate, apices acute, faces glabrous or hirsute to strigose;
basal petiolate, 5–30 × 1–8 cm;
cauline petiolate, 2–25 × 0.5–7 cm, bases attenuate to cordate or auriculate.
hemispheric to ovoid;
paleae 2.5–4 mm, (apical margins usually ciliate) apices obtuse to acute, abaxial tips usually glabrous.
10–15;
laminae elliptic to oblanceolate, 15–25 × 3–6 mm, abaxially strigose.
50–500+;
corollas proximally yellowish green, brown-purple distally, 3–4.2 mm;
style branches ca. 1.3 mm, apices rounded.
to 2 cm.
borne singly or (2–7) in corymbiform arrays.
2.2–4 mm;
pappi coroniform, to 0.2 mm.
12–16 × 10–18 mm.
Rudbeckia fulgida
Varieties 7 (7 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Basal leaf blade lengths ± 3 times widths | var. fulgida |
1. Basal leaf blade lengths to 2 times widths | → 2 |
2. Cauline leaves not notably smaller distally | → 3 |
2. Cauline leaves notably smaller distally (except var. umbrosa) | → 4 |
3. Stems densely villous-hirsute; basal leaf margins mostly coarsely crenate; cauline leaf margins sharply serrate (teeth remote); Illinois, Indiana, Ohio | var. deamii |
3. Stems glabrous or sparsely villous-hirsute; basal leaf margins entire or crenate; cauline leaf margins coarsely serrate to lacerate; ne United States | var. speciosa |
4. Ray laminae 25–40 mm; palea margins eciliate (Indiana, Michigan, Ohio) | var. sullivantii |
4. Ray laminae 10–30 mm; palea margins ciliate | → 5 |
5. Leaf bases (basal and proximal cauline) broadly rounded to cordate (Alabama, Arkansas, Georgia, Indiana, Kentucky, Mississippi, Missouri, North Carolina, Ohio, South Carolina, Tennessee, Virginia) | var. umbrosa |
5. Leaf bases (basal and proximal cauline) usually acute, attenuate, cuneate, or rounded | → 6 |
6. Cauline leaf blades lanceolate to ovate; ray laminae 15–25+ mm; Arkansas, Missouri, Oklahoma, Texas | var. palustris |
6. Cauline leaf blades oblanceolate to broadly spatulate or pandurate; ray laminae 10–15 mm; Alabama, Florida, Georgia, North Carolina, South Carolina, Tennessee, Virginia, West Virginia | var. spathulata |
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