Ratibida tagetes

(E. James) Barnhart

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

Common names: Green Mexican-hat or prairie coneflower shortray prairie coneflower
Basionym: Rudbeckia tagetes E. James Account Exped. Pittsburgh 2: 68. 1823
Treatment appears in FNA Volume 21. Treatment on page 62. Mentioned on page 61.

Perennials, to 55 cm; taprooted. Leaves (proximal sometimes lanceolate, usually pinnately lobed; cauline mostly 1–2-pinnately lobed) 0.5–9 × 0.2–6.7 cm, lobes 2–7, linear to narrowly lanceolate-obovate, 0.5–4 mm wide, faces strigose and glanddotted. Heads 1–8+, held just beyond leaves. Peduncles 0.3–6.5 cm (± uniformly green, not ribbed). Phyllaries 10–12, outer lanceolate, 1.2–6 × 0.5–2.5 mm, inner lanceolate-ovate, 1.2–4 × 0.3–1.5 mm. Paleae oblong, 2–4 × 1.5–2.5 mm, resin-glands linear to oblanceolate, 1–2 mm. Ray-florets 5–10; corollas yellow or purplish yellow to purple, laminae linear to elliptic-oblanceolate, 3–10 × 2–6 mm. Discs subspheric to ovoid or ellipsoid, 5–15 × 5–14 mm. Disc-florets 50–200+; corolla greenish yellow, sometimes purplish distally, 1.2–2.5 mm; style-branches 0.8–1.2 mm, proximal 1/2 stigmatic, apices subulate. Cypselae oblong-oblique, 1.9–2.8 × 1.2–2 mm, adaxial margins usually winged and distally ciliate, apices ciliate; pappi coroniform (of connate scales, 0.2–1.5 mm). 2n = 32.


Phenology: Flowering May–Oct.
Habitat: Prairies, high plains, rocky hillsides
Elevation: 300–2500 m

Distribution

V21-140-distribution-map.gif

Ariz., Colo., Kans., N.Mex., Okla., Tex., Mexico (Chihuahua)

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Ratibida tagetes"
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 +
(E. James) Barnhart +
decurrent +
Rudbeckia tagetes +
compound +  and simple +
lanceolate;ovate or oblanceolate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Green Mexican-hat or prairie coneflower +  and shortray prairie coneflower +
purplish +, greenish yellow +, purplish yellow +  and purple +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
hairy +  and glabrous +
linear-oblanceolate +  and oblong-oblique +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
fertile +  and bisexual +
fertile +  and bisexual +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
subspheric;ovoid or ellipsoid +
5mm;14mm +
Ariz. +, Colo. +, Kans. +, N.Mex. +, Okla. +, Tex. +  and Mexico (Chihuahua) +
300–2500 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
linear +  and oblanceolate +
Prairies, high plains, rocky hillsides +
in loose , corymbiform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
1.2mm +  and 4mm +
0.3mm +  and 1.5mm +
0.8 cm8 mm <br />0.008 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
linear +  and elliptic-oblanceolate +
0.5cm;9cm +
cauline +  and basal +
0.2 cm2 mm <br />0.002 m <br /> (6.7 cm67 mm <br />0.067 m <br />) +
linear +  and narrowly lanceolate-obovate +
0.5mm +  and 4mm +
dentate to pinnatifid or palmatifid +  and entire +
pectinate-fimbriate +  and ciliate +
1.2mm +  and 6mm +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
2-carpellate +
2mm +  and 4mm +
1.5mm;2.5mm +
persistent +
coroniform +
0.3 cm3 mm <br />0.003 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
Flowering May–Oct. +
10 +  and 12 +
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 tagetes +
Ratibida +
species +
cylindric +
toothed +  and serrate +
0 cm0 mm <br />0 m <br /> (55 cm550 mm <br />0.55 m <br />) +
tree +, shrub +  and subshrub +