Helenium campestre

Small

Fl. S.E. U.S., 1291, 1341. 1903.

Common names: Oldfield sneezeweed
Endemic
Treatment appears in FNA Volume 21. Treatment on page 430. Mentioned on page 427.
Revision as of 22:36, 29 July 2020 by imported>Volume Importer
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Perennials, 40–100 cm. Stems usually 1, branched distally, moderately to strongly winged, densely (the proximal) to moderately hairy. Leaves moderately to densely hairy; basal blades oblanceolate to obovate to spatulate, entire or undulate-serrate; proximal and mid-blades oblanceolate to lanceolate, usually entire, sometimes undulate-serrate; distal blades lanceolate to lance-linear, entire. Heads 3–20 per plant, in paniculiform to corymbiform arrays. Peduncles 3–11 cm, moderately to densely hairy. Involucres globoid to ovoid, 9–17 × 10–20 mm. Phyllaries (barely connate proximally) moderately to densely hairy. Ray-florets 9–15, neuter; corollas yellow, 20–30 × 8–15 mm. Disc-florets 150–500 (–700+); corollas yellow proximally, reddish-brown to purple distally, 3–5 mm, lobes 5. Cypselae 1–1.4 mm, sparsely to moderately hairy; pappi of 6–7, entire, non-aristate scales 0.3–0.5 mm. 2n = 28.


Phenology: Flowering May–Jun(–Jul).
Habitat: Ditches, fields, in washes, along streams
Elevation: 100–200 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Helenium campestre"
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 +
oblanceolate +  and obovate +
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 +
Oldfield sneezeweed +
reddish-brown +  and purple +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
4-5-angled +  and obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
lanceolate;lance-linear +
100–200 m +
gland-dotted +
glabrous or +  and sparsely densely hairy +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Ditches, fields, in washes, along streams +
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 />) +
0.9 cm9 mm <br />0.009 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
sessile +  and petiolate +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
connate +  and distinct +
ovate +, oblong +, oblanceolate +, linear +, lanceolate +  and elliptic +
unequal +  and subequal +
2-carpellate +
persistent +
3 cm30 mm <br />0.03 m <br /> (11 cm110 mm <br />0.11 m <br />) +
Flowering May–Jun(–Jul). +
9 +  and 34 +
Fl. S.E. U.S., +
bearing subulate enations +, hairy +  and bristly +
ovoid;hemispheric;ovoid;hemispheric;globose;conic +
6 +  and 7 +
non-aristate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
exalbuminous +
winged +  and branched +
1 (?) +  and 10 (?) +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Helenium campestre +
Helenium +
species +
urceolate +  and campanulate +
dilated +
toothed +  and entire +
40 cm400 mm <br />0.4 m <br /> (100 cm1,000 mm <br />1 m <br />) +
shrub +  and subshrub +