Helianthus neglectus

Heiser

Rhodora 60: 275, fig. 2. 1958.

Common names: Neglected sunflower
EndemicConservation concern
Treatment appears in FNA Volume 21. Treatment on page 153. Mentioned on page 143.

Annuals, 80–200 cm. Stems erect (leafy), ± hispid to glabrate. Leaves cauline; alternate; petioles 7–12 cm; blades deltate-ovate, 7–14 × 7.5–12.3 cm, bases usually ± cordate, sometimes truncate, margins subentire to serrulate, abaxial faces strigose, not glanddotted. Heads 1–5. Peduncles 10–40 cm. Involucres ± hemispheric, (23–28 ×) 10–14 mm. Phyllaries 25–35, lanceolate, 14–25 × 2.3–4 mm (surpassing discs), apices long-attenuate, abaxial faces strigillose to hispid. Paleae 9–10 mm, 3-toothed (middle teeth ± ciliate or bearded, hairs whitish, 0.3–0.6 mm). Ray-florets 21–31; laminae 29–39 mm. Disc-florets 150+; corollas 6–6.5 mm, lobes reddish; anthers dark, appendages purplish (style-branches reddish). Cypselae 4–5 mm, strigillose to glabrate; pappi of 2 aristate scales 2.8–3.2 mm. 2n = 34.


Phenology: Flowering summer–fall.
Habitat: Sandy soils, sand dunes
Elevation: 800–1100 m

Discussion

Of conservation concern.

Selected References

None.

Lower Taxa

None.

"[" is not declared as a valid unit of measurement for this property."]" is not declared as a valid unit of measurement for this property.

... more about "Helianthus neglectus"
strigillose +  and hispid +
not tailed +, rounded +  and obtuse +
pale +  and dark +
connate +  and distinct +
long-attenuate +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
spiciform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Edward E. Schilling +
Heiser +
cordate +
7 cm70 mm <br />0.07 m <br /> (14 cm140 mm <br />0.14 m <br />) +
deltate-ovate +
7.5 cm75 mm <br />0.075 m <br /> (12.3 cm123 mm <br />0.123 m <br />) +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Neglected sunflower +
reddish +  and yellow +
0.6 cm6 mm <br />0.006 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
strigillose +  and glabrate +
compressed +  and obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
N.Mex. +  and Tex. +
800–1100 m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Sandy soils, sand dunes +
in more or less corymbiform , paniculiform or spiciform , arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
hemispheric +
2.9 cm29 mm <br />0.029 m <br /> (3.9 cm39 mm <br />0.039 m <br />) +
sessile +  and petiolate +
triangular +
serrate +  and entire +
subentire +  and serrulate +
2-carpellate +
3-toothed +
0.9 cm9 mm <br />0.009 m <br /> (1 cm10 mm <br />0.01 m <br />) +
persistent +
coroniform +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
7 cm70 mm <br />0.07 m <br /> (12 cm120 mm <br />0.12 m <br />) +
Flowering summer–fall. +
1.4 cm14 mm <br />0.014 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
25 +  and 35 +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
aristate +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
exalbuminous +
Endemic +  and Conservation concern +
procumbent +  and decumbent +
less hispid +  and glabrate +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Lagasceinae +
Helianthus neglectus +
Helianthus +
species +
campanulate +
toothed +  and entire +
300 cm3,000 mm <br />3 m <br /> (500 cm5,000 mm <br />5 m <br />) +
80 cm800 mm <br />0.8 m <br /> (200 cm2,000 mm <br />2 m <br />) +
2 cm20 mm <br />0.02 m <br /> (20 cm200 mm <br />0.2 m <br />) +
shrub +  and subshrub +