Vernonia arkansana

de Candolle in A. P. de Candolle and A. L. P. P. de Candolle

in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 7: 264. 1838.

IllustratedEndemic
Synonyms: Vernonia crinita Rafinesque
Treatment appears in FNA Volume 19. Treatment on page 208. Mentioned on page 207.

Plants 8–12 (–20) dm. Stems scabrellous to pilosulous, glabrescent. Leaves mostly cauline; blades lance-linear, 6–14 (–20) cm × 7–15 (–25) mm, l/w = 7–10 (–18), abaxially scabrellous (hairs awl-shaped), resin-gland-dotted, adaxially scaberulous, glabrescent, resin-gland-dotted. Heads in ± corymbiform arrays. Peduncles 2–5 cm. Involucres ± hemispheric, 11–15 × 11–15 mm. Phyllaries (50–) 60–70+ in 5–6 series, scabrellous (and resin-gland-dotted), margins ciliolate, the outer lanceovate, 3–8+ mm, inner lanceolate, 12–15 mm, tips subulate to filiform. Florets 50–100+. Cypselae 3–5 mm; pappi fuscous to purplish, outer scales 25–30+, 0.5–1 mm, contrasting with 25–30+, 5–7 mm inner bristles. 2n = 34.


Phenology: Flowering Aug–Oct.
Habitat: Leas, roadsides, stream banks, in sand or on limestone
Elevation: 200–300 m

Discussion

Vernonia arkansana was published in April, V. crinita in October 1838.

Selected References

None.

Lower Taxa

None.

"dm" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property.

... more about "Vernonia arkansana"
resin-gland-dotted +, glabrous +, glabrate +, tomentose +  and pannose +
resin-gland-dotted +  and glabrate +
acute;attenuate +
scarious +
ovate +  and lanceolate +
indeterminate +  and determinate +
10 cm100 mm <br />0.1 m <br /> (25 cm250 mm <br />0.25 m <br />) +
John L. Strother +
de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
cuneate +
compound +  and simple +
14 cm140 mm <br />0.14 m <br /> (20 cm200 mm <br />0.2 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
6 cm60 mm <br />0.06 m <br /> (14 cm140 mm <br />0.14 m <br />) +
resin-gland-dotted +  and glabrescent +
scabrellous +
filiform;linear;filiform;linear;spatulate;oblanceolate;lanceolate;elliptic;ovate +
0.7 cm7 mm <br />0.007 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
ribbed;nerved;ribbed;nerved;smooth +
lance-linear;more or less lanceolate +
zygomorphic +, actinomorphic +  and (3-)5-merous +
pink +  and purplish +
resin-gland-dotted +, more or less strigillose +  and hirtellous +
fertile +  and bisexual +
Ark. +, Kans. +, Mo. +  and Okla. +
200–300 m +
gland-dotted +
sparsely strigillose +  and tomentose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Leas, roadsides, stream banks, in sand or on limestone +
pedunculate +
in usually determinate , rarely indeterminate , arrays +  and singly +
indeterminate +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1.1 cm11 mm <br />0.011 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
hemispheric +
1.1 cm11 mm <br />0.011 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
petiolate +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
2-carpellate +
fuscous +  and purplish +
persistent +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Flowering Aug–Oct. +
60 +  and 70 +
scabrellous +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
subulate +  and setiform +
exalbuminous +
Illustrated +  and Endemic +
prostrate +  and ascending +
glabrescent +  and pilosulous +
scabrellous +
appendaged +  and truncate +
hirsutulous +
Vernonia crinita +
Vernonia arkansana +
Vernonia +
species +
subulate +  and filiform +