Ratibida pinnata

(Ventenat) Barnhart

Bull. Torrey Bot. Club 24: 410. 1897.

Common names: Grayhead or pinnate prairie coneflower
IllustratedEndemic
Basionym: Rudbeckia pinnata Ventenat Descr. Pl. Nouv., plate 71. 1802
Treatment appears in FNA Volume 21. Treatment on page 62. Mentioned on page 61.

Perennials, to 125+ cm; fibrous-rooted (arising from stout rhizomes or woody caudices). Leaves 5–40 × 3–15+ cm, pinnatifid to pinnate, lobes 3–9, narrowly lanceolate to ovate, 1–15 × 0.2–3.5 cm, faces strigose, glanddotted. Heads mostly 1–12, held well beyond leaves. Peduncles 3–27+ cm (ribs tan, prominent). Phyllaries 10–15, outer linear, 3–15 × 1–3 mm, inner lanceolate-ovate, 3–6 × 0.7–3 mm. Paleae 1.2–5 × 1–1.8 mm, resin-glands linear to oblanceolate, 2–3.3 mm. Ray-florets 6–15; corollas yellow, 2.5–3.8 mm, tubes ca. 1–3 mm, hirsute, laminae linear-elliptic to oblong-oblanceolate, 16–60 × 4–15 mm. Discs ellipsoid to globular or ovoid, 10–25 × 10–18 mm. Disc-florets 100–200+; corollas greenish yellow, often purplish distally, 2.5–3.8 mm; style-branches ca. 1.8 mm, proximal 1/2 stigmatic, apices subulate. Cypselae linear-oblanceoloid, 2–4 × 1–2.3 mm, margins usually glabrous, sometimes adaxial ciliate; pappi 0 or of 1–2 toothlike projections. 2n = 28.


Phenology: Flowering May–Oct.
Habitat: Prairies, woodland openings and borders, limestone outcrops
Elevation: 10–300 m

Distribution

V21-139-distribution-map.gif

Ont., Ala., Ark., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Mass., Mich., Minn., Miss., Mo., Nebr., N.Y., Ohio, Okla., S.Dak., Tenn., Vt., Wis.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Ratibida pinnata"
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 +
(Ventenat) Barnhart +
decurrent +
Rudbeckia pinnata +
compound +  and simple +
lanceolate;ovate or oblanceolate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Grayhead or pinnate prairie coneflower +
purplish +, greenish yellow +  and yellow +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
hairy +  and glabrous +
linear-oblanceoloid +
0.1 cm1 mm <br />0.001 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
fertile +  and bisexual +
fertile +  and bisexual +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
ellipsoid;globular or ovoid +
10mm;18mm +
Ont. +, Ala. +, Ark. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Nebr. +, N.Y. +, Ohio +, Okla. +, S.Dak. +, Tenn. +, Vt. +  and Wis. +
10–300 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
0.2 cm2 mm <br />0.002 m <br /> (0.33 cm3.3 mm <br />0.0033 m <br />) +
linear +  and oblanceolate +
Prairies, woodland openings and borders, limestone outcrops +
in loose , corymbiform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
3mm +  and 6mm +
0.7mm +  and 3mm +
0.8 cm8 mm <br />0.008 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
16mm;60mm +
linear-elliptic +  and oblong-oblanceolate +
4mm;15mm +
5cm;40cm +
cauline +  and basal +
pinnatifid;pinnate +
3 cm30 mm <br />0.03 m <br /> (15 cm150 mm <br />0.15 m <br />) +
1 cm10 mm <br />0.01 m <br /> (15 cm150 mm <br />0.15 m <br />) +
narrowly lanceolate +  and ovate +
0.2cm +  and 3.5cm +
dentate to pinnatifid or palmatifid +  and entire +
pectinate-fimbriate +  and ciliate +
3mm +  and 15mm +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
2-carpellate +
1.2mm +  and 5mm +
1mm;1.8mm +
persistent +
of 1 +  and 2 toothlike projections +
coroniform +
3 cm30 mm <br />0.03 m <br /> (27 cm270 mm <br />0.27 m <br />) +
Flowering May–Oct. +
10 +  and 15 +
Bull. Torrey Bot. Club +
bearing subulate enations +, hairy +  and bristly +
subspheric;columnar +
2 +  and 8 +
exalbuminous +
Illustrated +  and Endemic +
1 +  and 12 +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Ratibida pinnata +
Ratibida +
species +
cylindric +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
toothed +  and serrate +
0 cm0 mm <br />0 m <br /> (125 cm1,250 mm <br />1.25 m <br />) +
tree +, shrub +  and subshrub +