Helianthus anomalus

S. F. Blake

J. Wash. Acad. Sci. 21: 333. 1931.

Common names: Anomalous sunflower
Endemic
Treatment appears in FNA Volume 21. Treatment on page 154. Mentioned on page 143, 155.

Annuals, 25–60 cm. Stems erect, sparsely hispid. Leaves mostly cauline; mostly alternate; petioles 1.2–5 cm; blades ovate to lanceovate, 4.5–13 × 1–4 cm, bases cuneate, margins entire, abaxial faces sparsely hispid, not glanddotted. Heads usually borne singly. Peduncles 4–9 cm. Involucres hemispheric, 20–27 mm diam. Phyllaries 11–23, laceolate to lance-linear or lanceovate, 17–33 × 1–2.9 mm (notably surpassing discs), (margins ± ciliate) apices attenuate, abaxial faces usually sparsely hispid to hispidulous. Paleae 7–8 mm, apices 3-toothed (middle teeth attenuate, apices purplish, ± hispid). Ray-florets 7–12; laminae 18–37 mm. Disc-florets 25+; corollas 6.8–7.5 mm, lobes reddish; anthers dark, appendages dark (style-branches reddish). Cypselae 4.6–9 mm, appressed hairy; pappi of 2 linear scales 2–4.5 mm plus 4–6 scales 1–3.5 mm. 2n = 34.


Phenology: Flowering spring–fall.
Habitat: Sand dunes
Elevation: 1300–1500 m

Discussion

L. H. Rieseberg (1991) provided evidence that Helianthus anomalus is a hybrid species derived from H. annuus and H. petiolaris, and subsequent work has confirmed and extended that hypothesis.

Selected References

None.

Lower Taxa

None.
... more about "Helianthus anomalus"
usually sparsely hispid +  and hispidulous +
not tailed +, rounded +  and obtuse +
pale +  and dark +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
spiciform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Edward E. Schilling +
S. F. Blake +
cuneate +
4.5 cm45 mm <br />0.045 m <br /> (13 cm130 mm <br />0.13 m <br />) +
ovate;lanceovate +
1cm;4cm +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Anomalous sunflower +
reddish +  and yellow +
0.68 cm6.8 mm <br />0.0068 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
compressed +  and obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +  and Utah. +
1300–1500 m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Sand dunes +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
2 cm20 mm <br />0.02 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
hemispheric +
1.8 cm18 mm <br />0.018 m <br /> (3.7 cm37 mm <br />0.037 m <br />) +
sessile +  and petiolate +
triangular +
2-carpellate +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
persistent +
4 +  and 6 +
coroniform +
4 cm40 mm <br />0.04 m <br /> (9 cm90 mm <br />0.09 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Flowering spring–fall. +
1.7 cm17 mm <br />0.017 m <br /> (3.3 cm33 mm <br />0.033 m <br />) +
11 +  and 23 +
0.1 cm1 mm <br />0.001 m <br /> (0.29 cm2.9 mm <br />0.0029 m <br />) +
J. Wash. Acad. Sci. +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
aristate +  and lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
exalbuminous +
procumbent +  and decumbent +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Lagasceinae +
Helianthus anomalus +
Helianthus +
species +
campanulate +
toothed +  and entire +
300 cm3,000 mm <br />3 m <br /> (500 cm5,000 mm <br />5 m <br />) +
25 cm250 mm <br />0.25 m <br /> (60 cm600 mm <br />0.6 m <br />) +
shrub +  and subshrub +