Helenium drummondii

H. Rock

Rhodora 59: 173. 1957.

Common names: Fringed sneezeweed
Endemic
Basionym: Leptopoda fimbriatum Torrey & A. Gray Fl. N. Amer. 2: 387. 1842,
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
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Perennials, 20–60 cm. Stems usually 1, usually unbranched distally, moderately to strongly winged, glabrous proximally, glabrous or sparsely hairy distally. Leaves glabrous; basal blades narrowly obovate to narrowly oblanceolate, usually entire, sometimes undulate-serrate; proximal and mid-blades narrowly lanceolate, usually entire, sometimes undulate-serrate; distal blades lance-linear, usually entire, rarely undulate-serrate. Heads 1 (–3) per plant, usually borne singly. Peduncles 10–30 cm, sparsely hairy. Involucres hemispheric to globoid, 10–18 × 15–25 mm. Phyllaries sparsely to moderately hairy. Ray-florets 13–30, neuter; corollas yellow, 14–25 × 4–10 mm. Disc-florets 250–650 (–1000+); corollas yellow, 4.3–5.4 mm, lobes 5. Cypselae 1.2–1.5 mm, moderately hairy; pappi of 5–12 deeply lacerate, non-aristate scales 2–3.7 mm. 2n = 32.


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

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Helenium drummondii"
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 +
H. Rock +
undulate-serrate +, narrowly obovate +  and narrowly oblanceolate +
decurrent +
Leptopoda fimbriatum +
compound +  and simple +
pinnatifid;lobed;spatulate;ovate;spatulate;ovate;oblong;oblanceolate;linear;lanceolate;elliptic +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Fringed sneezeweed +
1.4 cm14 mm <br />0.014 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.43 cm4.3 mm <br />0.0043 m <br /> (0.54 cm5.4 mm <br />0.0054 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
4-5-angled +  and obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
undulate-serrate +
Ark. +, La. +  and Tex. +
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 /> (1.8 cm18 mm <br />0.018 m <br />) +
hemispheric +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 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 +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Flowering (Mar–)Apr(–May). +
9 +  and 34 +
bearing subulate enations +, hairy +  and bristly +
ovoid;hemispheric;ovoid;hemispheric;globose;conic +
5 +  and 12 +
non-aristate +  and lacerate +
0.2 cm2 mm <br />0.002 m <br /> (0.37 cm3.7 mm <br />0.0037 m <br />) +
exalbuminous +
winged +  and unbranched +
1 (?) +  and 10 (?) +
hairy +  and glabrous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Helenium drummondii +
Helenium +
species +
urceolate +  and campanulate +
dilated +
toothed +  and entire +
20 cm200 mm <br />0.2 m <br /> (60 cm600 mm <br />0.6 m <br />) +
shrub +  and subshrub +