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.

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 +
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 (?) +
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 +