Vernonia glauca

(Linnaeus) Willdenow

Sp. Pl. 3: 1633. 1803.

Endemic
Basionym: Serratula glauca Linnaeus Sp. Pl. 2: 818. 1753
Treatment appears in FNA Volume 19. Treatment on page 209. Mentioned on page 207.
Revision as of 19:05, 29 July 2020 by imported>Volume Importer
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Plants 6–10+ dm. Stems sparsely appressed-puberulent, glabrescent. Leaves mostly cauline; blades lanceolate to oblanceolate, 10–15 (–18+) cm × 30–45 (–70+) mm, l/w = 2.5–3.5 (–4), abaxially scabrellous (hairs awl-shaped), resin-gland-dotted or not, adaxially glabrous or sparsely puberulent. Heads in corymbiform to paniculiform arrays. Peduncles 2–35 mm. Involucres ± hemispheric, 5–8 × 7–8 mm. Phyllaries 40–60 in 5–6 series, sparsely puberulent to tomentulose, glabrescent, margins ciliolate, the outer lance-deltate to subulate, 1–3 mm, inner oblong, 4–7+ mm, tips acuminate to subulate or filiform. Florets 30–45+. Cypselae 3–4 mm; pappi stramineous to whitish, outer subulate scales or bristles 30, 0.5–1.5+ mm, intergrading with 30+, 6–8 mm inner subulate scales or bristles. 2n = 34.


Phenology: Flowering Jul–Sep.
Habitat: Dry fields, marshes
Elevation: 10–400 m

Distribution

V19-255-distribution-map.gif

Ala., Del., D.C., Ga., Md., Mass., N.J., N.C., Pa., S.C., Va.

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.

... more about "Vernonia glauca"
resin-gland-dotted +, glabrous +, glabrate +, tomentose +  and pannose +
resin-gland-dotted +  and glabrate +
acute;attenuate +
scarious +
ovate +  and lanceolate +
corymbiform +  and paniculiform +
indeterminate +  and determinate +
10 cm100 mm <br />0.1 m <br /> (25 cm250 mm <br />0.25 m <br />) +
John L. Strother +
(Linnaeus) Willdenow +
cuneate +
Serratula glauca +
compound +  and simple +
15 cm150 mm <br />0.15 m <br /> (18 cm180 mm <br />0.18 m <br />) +
4.5 cm45 mm <br />0.045 m <br /> (7 cm70 mm <br />0.07 m <br />) +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
puberulent +, glabrous +, not +  and resin-gland-dotted +
scabrellous +
lanceolate;oblanceolate +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 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 +
Ala. +, Del. +, D.C. +, Ga. +, Md. +, Mass. +, N.J. +, N.C. +, Pa. +, S.C. +  and Va. +
10–400 m +
gland-dotted +
sparsely strigillose +  and tomentose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Dry fields, marshes +
pedunculate +
in usually determinate , rarely indeterminate , arrays +  and singly +
indeterminate +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 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 /> (0.8 cm8 mm <br />0.008 m <br />) +
hemispheric +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
petiolate +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
lance-deltate +  and subulate +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
2-carpellate +
stramineous +  and whitish +
persistent +
0.2 cm2 mm <br />0.002 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Flowering Jul–Sep. +
glabrescent +, sparsely puberulent +  and tomentulose +
40 +  and 60 +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
subulate +  and setiform +
exalbuminous +
prostrate +  and ascending +
glabrescent +  and appressed-puberulent +
appendaged +  and truncate +
hirsutulous +
Compositae +
Vernonia glauca +
Vernonia +
species +
acuminate +  and subulate or filiform +