Helenium vernale

Walter

Fl. Carol., 210. 1788.

Common names: Savanna or spring sneezeweed
IllustratedEndemic
Treatment appears in FNA Volume 21. Treatment on page 429. Mentioned on page 427.
Revision as of 21:35, 29 July 2020 by imported>Volume Importer
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Perennials, 30–80 cm. Stems usually 1, usually unbranched distally, weakly winged, glabrous proximally, glabrous or sparsely hairy distally. Leaves usually glabrous, rarely sparsely hairy; basal blades obovate to narrowly oblanceolate, usually entire or undulate to undulate-serrate; proximal and mid-blades usually narrowly lanceolate to narrowly oblanceolate, usually entire, sometimes toothed; distal blades lance-linear, entire. Heads 1 (–3) per plant, usually borne singly. Peduncles 2–23 cm, usually glabrous, sometimes sparsely hairy. Involucres hemispheric, 10–17 × 15–27 mm. Phyllaries glabrous or sparsely hairy. Ray-florets 13–30, neuter; corollas yellow, 15–21 × 5–10 mm. Disc-florets 150–650 (–800+); corollas yellow proximally, yellow to yellowbrown distally, 4.6–6 mm, lobes 5. Cypselae 1–1.5 mm, glabrous; pappi of usually 8 entire or lacerate, non-aristate scales 1.5–2 mm. 2n = 34.


Phenology: Flowering Mar–May.
Habitat: Ditches, other moist areas such as wet woods, bogs, and swamp edges
Elevation: 10–50 m

Distribution

V21-1072-distribution-map.gif

Ala., Fla., Ga., La., Miss., N.C., S.C.

Discussion

The name Helenium nuttallii A. Gray is illegitimate; it has been applied to plants treated here as H. vernale.

Selected References

None.

Lower Taxa

None.
... more about "Helenium vernale"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
paniculiform +  and corymbiform +
indeterminate +  and determinate +
Mark W. Bierner +
Walter +
obovate +  and narrowly oblanceolate usually entire or undulate +
decurrent +
compound +  and simple +
pinnatifid;lobed;spatulate;ovate;spatulate;ovate;oblong;oblanceolate;linear;lanceolate;elliptic +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Savanna or spring sneezeweed +
yellow +  and yellowbrown +
1.5 cm15 mm <br />0.015 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
0.46 cm4.6 mm <br />0.0046 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
4-5-angled +  and obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
Ala. +, Fla. +, Ga. +, La. +, Miss. +, N.C. +  and S.C. +
10–50 m +
gland-dotted +
glabrous or +  and sparsely densely hairy +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Ditches, other moist areas such as wet woods, bogs, and swamp edges +
discoid +  and radiate +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (3.4 cm34 mm <br />0.034 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
hemispheric +
1.5 cm15 mm <br />0.015 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
sessile +  and petiolate +
hairy +  and glabrous +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
connate +  and distinct +
ovate +, oblong +, oblanceolate +, linear +, lanceolate +  and elliptic +
unequal +  and subequal +
2-carpellate +
persistent +
lacerate +  and entire +
hairy +  and glabrous +
2 cm20 mm <br />0.02 m <br /> (23 cm230 mm <br />0.23 m <br />) +
Flowering Mar–May. +
hairy +  and glabrous +
9 +  and 34 +
Fl. Carol., +
bearing subulate enations +, hairy +  and bristly +
ovoid;hemispheric;ovoid;hemispheric;globose;conic +
5 +  and 12 +
non-aristate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
exalbuminous +
Illustrated +  and Endemic +
winged +  and unbranched +
1 (?) +  and 10 (?) +
hairy +  and glabrous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Helenium vernale +
Helenium +
species +
urceolate +  and campanulate +
dilated +
toothed +  and entire +
30 cm300 mm <br />0.3 m <br /> (80 cm800 mm <br />0.8 m <br />) +
shrub +  and subshrub +