Ratibida peduncularis

(Torrey & A. Gray) Barnhart

Bull. Torrey Bot. Club 24: 411. 1897.

Common names: Naked prairie coneflower or Mexican-hat
Basionyms: Lepachys peduncularis Torrey & A. Gray Fl. N. Amer. 2: 315. 1842
Treatment appears in FNA Volume 21. Treatment on page 61.

Perennials, to 115+ cm; taprooted. Leaves 1.6–14 × 1–6.5 cm, 2-pinnatifid to lyrate-pinnate, lobes 3–10, narrowly linear-lanceolate to narrowly ovate, 0.8–4.5 mm wide, faces hirsute and glanddotted. Heads 1–12+, held well beyond leaves. Peduncles 14–45+ cm (ribs tan, prominent). Phyllaries 7–14, outer linear, 6–12 × 0.8–1.5 mm, inner lanceovate, 1–5 × 0.8–1.5 mm. Paleae 3–4.3 × 1.5–3 mm, resin-glands oval, 1–1.8 mm. Ray-florets 4–14; corollas yellow, purplish yellow, or maroon, often bicolor (maroon/yellow), laminae mostly ovate to elliptic, 5–15 × 4–12 mm. Discs columnar, 15–70 × 8–13 mm. Disc-florets 200–400+; corollas greenish yellow, often purplish distally, 2.5–3 mm; style-branches ca. 1.8 mm, proximal 1/2 stigmatic, apices subulate. Cypselae oblong, 2.3–5 × 1.2–3 mm, abaxial margins narrowly winged to fimbriate or pectinate-fimbriate, adaxial margins pectinate-fimbriate; pappi (tan) of 1–2 toothlike projections.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Leaves 2-pinnatifid; cypselae pectinate-fimbriate (both margins) Ratibida peduncularis var. peduncularis
1 Leaves lyrate-pinnate; cypselae pectinate-fimbriate (adaxial margins) Ratibida peduncularis var. picta
... more about "Ratibida peduncularis"
pectinate-fimbriate +  and fimbriate +
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 +
(Torrey & A. Gray) Barnhart +
decurrent +
Lepachys peduncularis +
compound +  and simple +
lanceolate;ovate or oblanceolate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Naked prairie coneflower or Mexican-hat +
purplish +, greenish yellow +, bicolor +, maroon +, purplish yellow +  and yellow +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
hairy +  and glabrous +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
fertile +  and bisexual +
fertile +  and bisexual +
1.5 cm15 mm <br />0.015 m <br /> (7 cm70 mm <br />0.07 m <br />) +
columnar +
8mm;13mm +
La. +, Tex. +  and ne Mexico +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
0.1 cm1 mm <br />0.001 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
in loose , corymbiform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
1mm +  and 5mm +
0.8mm +  and 1.5mm +
0.8 cm8 mm <br />0.008 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
mostly ovate +  and elliptic +
4mm;12mm +
1.6cm;14cm +
cauline +  and basal +
2-pinnatifid;lyrate-pinnate +
1 cm10 mm <br />0.01 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
narrowly linear-lanceolate +  and narrowly ovate +
0.8mm +  and 4.5mm +
dentate to pinnatifid or palmatifid +  and entire +
pectinate-fimbriate +  and ciliate +
6mm +  and 12mm +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
2-carpellate +
3mm +  and 4.3mm +
1.5mm;3mm +
persistent +
coroniform +
14 cm140 mm <br />0.14 m <br /> (45 cm450 mm <br />0.45 m <br />) +
7 +  and 14 +
Bull. Torrey Bot. Club +
bearing subulate enations +, hairy +  and bristly +
subspheric;columnar +
2 +  and 8 +
exalbuminous +
1 +  and 12 +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Ratibida peduncularis +
Ratibida +
species +
cylindric +
toothed +  and serrate +
0 cm0 mm <br />0 m <br /> (115 cm1,150 mm <br />1.15 m <br />) +
tree +, shrub +  and subshrub +