Vernonia acaulis

(Walter) Gleason

Bull. New York Bot. Gard. 4: 222. 1906.

Endemic
Basionym: Chrysocoma acaulis Walter Fl. Carol., 196. 1788
Treatment appears in FNA Volume 19. Treatment on page 208. Mentioned on page 207.

Plants 4–6 (–10) dm. Stems ± puberulent, glabrescent. Leaves mostly basal; blades oblongelliptic to spatulate (basal, the distal narrower), 11–25 (–30) cm × (21–) 60–75+ mm, l/w = 2–4 (–5+), abaxially usually glabrous or glabrate, sometimes hirsutulous on veins, usually resin-gland-dotted, adaxially ± scabrellous or glabrate. Heads in loose, corymbiform arrays. Peduncles 5–50 mm. Involucres campanulate to hemispheric, 5–10 × 6–7 mm. Phyllaries 40–60 in 5–6 series, glabrate, margins ciliolate, the outer lance-linear, 2–4 mm, inner lanceovate to lance-subulate, 5–9 mm, tips subulate to filiform. Florets 30–40 (–55+). Cypselae 2.5–3+ mm; pappi whitish to stramineous, outer scales ca. 20, 0.6–1 mm, contrasting with 25–40, 5–7+ mm inner bristles. 2n = 34.


Phenology: Flowering Jul–Aug.
Habitat: Open woods, pine savannas, bogs, disturbed places
Elevation: 10–300 m

Discussion

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 acaulis"
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 +
(Walter) Gleason +
cuneate +
Chrysocoma acaulis +
compound +  and simple +
25 cm250 mm <br />0.25 m <br /> (30 cm300 mm <br />0.3 m <br />) +
2.1 cm21 mm <br />0.021 m <br /> (6 cm60 mm <br />0.06 m <br />) +
11 cm110 mm <br />0.11 m <br /> (25 cm250 mm <br />0.25 m <br />) +
glabrate +, resin-gland-dotted +, hirsutulous +  and glabrous +
scabrellous +
oblongelliptic;spatulate +
6 cm60 mm <br />0.06 m <br /> (7.5 cm75 mm <br />0.075 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 +
Fla. +, Ga. +, N.C. +  and S.C. +
10–300 m +
gland-dotted +
sparsely strigillose +  and tomentose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Open woods, pine savannas, bogs, disturbed places +
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 />) +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
campanulate;hemispheric +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
petiolate +  and sessile +
ovate +  and lanceolate or subulate +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
2-carpellate +
whitish +  and stramineous +
persistent +
0.5 cm5 mm <br />0.005 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Flowering Jul–Aug. +
40 +  and 60 +
Bull. New York Bot. Gard. +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
subulate +  and setiform +
exalbuminous +
prostrate +  and ascending +
glabrescent +  and puberulent +
appendaged +  and truncate +
hirsutulous +
Compositae +
Vernonia acaulis +
Vernonia +
species +
subulate +  and filiform +