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Helianthus divaricatus L.
ROUGH SUNFLOWER
Woodland sunflower

Life   Plantae   Dicotyledoneae   Asteraceae   Helianthus

Helianthus divaricatus, Woodland Sunflower
© Copyright Sheryl Pollock 2011 · 8
Helianthus divaricatus, Woodland Sunflower

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Helianthus divaricatus - Woodland Sunflower
© Copyright Sheryl Pollock 2011 · 8
Helianthus divaricatus - Woodland Sunflower
Helianthus divaricatus, leaf and flower
© Kay Yatskievych, 2003 · 1
Helianthus divaricatus, leaf and flower

Associates · map
FamilyScientific name @ source (records)
Andrenidae  Andrena aliciae @ AMNH_BEE (2)

Perdita bequaerti @ BBSL (1); AMNH_BEE (1)
Apidae  Bombus vagans @ LACM_ENTB (1)
Coleosporiaceae  Coleosporium helianthi @ BPI (20)
Cucurbitariaceae  Gibberidea heliopsidis @ BPI (1)
Dothioraceae  Metasphaeria maximiliani @ BPI (2)
Megachilidae  Coelioxys sayi @ AMNH_BEE (2)

Megachile mendica @ AMNH_BEE (1)

Megachile petulans @ CUIC_ENT (3)

Megachile xylocopoides @ CUIC_ENT (1)

Paranthidium jugatorium @ BBSL (1)

Stelis louisae @ AMNH_BEE (1)
Mycosphaerellaceae  Septoria paupera @ BPI (4)
Pucciniaceae  Puccinia helianthi @ BPI (35)

Puccinia tanaceti @ BPI (4)

Uromyces silphii @ BPI (1)
_  Cicinobolus cesatii @ BPI (1)

Montagnella heliopsidis @ BPI (2)

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Following modified from Delaware Wildflowers
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Delaware Wildflowers  •  Scientific names

Helianthus divaricatus L. Woodland Sunflower
Asteraceae — Aster family
Rare native
Helianthus divaricatus
Cheswold, Kent Co DE
August 2001

Guide to Helianthus of Delaware

More information on this plant, from other sources.


Copyright David G. Smith

Delaware Wildflowers main page

Following modified from MissouriPlants.com
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Helianthus divaricatus L.

Woodland Sunflower

Helianthus divaricatus plant

Family - Asteraceae

Stems - Thin erect, simple, herbaceous, typically single from the base, from a long horizontal rhizome, typically purplish and somewhat glaucous, mostly glabrous but with a few pustulate based hairs directly below the nodes, terete, 2-4mm in diameter at the base, -1m tall, with +/-10 nodes below the flowers.

Helianthus divaricatus root Root.

Helianthus divaricatus stem

Leaves - Opposite, decussate, sessile or very-short petiolate. Petioles to 2mm long. Blades lanceolate, attenuate, shallow serrate, very scabrous on the top, less scabrous below, rounded at the base, the lowest to +10cm long, +/-2cm broad at the base, with two lateral veins arising from the base of the blade. Teeth of the margins often with a minute white tip.

Helianthus divaricatus leaves

Helianthus divaricatus leaf base Leaf base.

Helianthus divaricatus leaf adaxial Adaxial surface of leaf.

Helianthus divaricatus leaf abaxial Abaxial surface of leaf.

Inflorescence - Single terminal flower head, typically just one per stem.

Involucre - -2cm broad in flower, 2.5cm broad in fruit. Phyllaries lanceolate, scabrous externally, glabrous internally, acuminate, to 1cm long and 5mm broad at the base, spreading with the tips ascending, light green, with ciliolate margins, imbricate.

Helianthus divaricatus involucre

Ray flowers - 8-9 flower per head, sterile. Ligule yellow, oblong, 2.5-3cm long, to 1cm broad, glabrous, acute with a very small single notch at the apex. Corolla tube -1mm long, glabrous. Achenes (in flower) -3mm long. Pappus of ray flowers a pair of serrate awns to 2mm long.

Helianthus divaricatus flowers

Disk flowers - Disk 1-1.5cm broad in flower, up to 2cm long in fruit. Flowers yellow. Corolla tube 3-4mm long, yellow, mostly glabrous but with some antrorse strigose pubescence externally (mostly in lines), glabrous internally, abruptly contracted at the basal 1mm. Lobes 5, 1-1.3mm long in flower, acute, erect to spreading. Stamens 5, included, adnate at the apex of the constricted portion of the corolla tube. Filaments white glabrous , 3mm long. Anthers maroon 3mm long, connate around the style, mostly included. Style exserted , glabrous, white, bifurcate, +/-5mm long. Stigmas yellow, to +2mm long, pubescent, reflexed. Achenes (in flower) white, glabrous, 3-4mm long. Pappus of 2 awns as in the ray flowers. Awns 2-3mm long. Receptacle hemispheric. Chaff enclosing the disk flowers almost entirely, to -1cm long, glabrous in basal half, pubescent on the margins and apex, slightly yellowish at the apex, acute, with a slightly reddish tip.

Helianthus divaricatus disk

Flowering - July - October.

Habitat - Rocky woods and thickets.

Origin - Native to U.S.

Other info. - This species can be found in the eastern-most counties of Missouri (essentially in the counties bordering the Mississippi River). The plant can be identified by its opposite, scabrous, sessile to nearly sessile leaves (which have rounded bases), thin stems, and long rhizomes.

Photographs taken at Fort Benning, GA., 7-3-05.


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http://plants.usda.gov/java/profile?symbol=HEDI2 ---> https://plants.usda.gov/java/profile?symbol=HEDI2
https://plants.usda.gov/java/profile?symbol=HEDI2 ---> http://plants.usda.gov/core/profile?symbol=HEDI2
http://plants.usda.gov/core/profile?symbol=HEDI2 ---> https://plants.usda.gov/core/profile?symbol=HEDI2
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You are here: Home / Plant Profile

Helianthus divaricatus L.
woodland sunflower

Image of Helianthus divaricatus

General Information
Symbol: HEDI2
Group: Dicot
Family: Asteraceae
Duration: Perennial
Growth Habit : Forb/herb
Native Status : CAN   N
L48   N
Data Source and Documentation
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Plants-NRCS Logos
green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   

Images

click on a thumbnail to view an image, or see all the Helianthus thumbnails at the Plants Gallery

©Thomas G. Barnes. Barnes, T.G., and S.W. Francis. 2004. Wildflowers and ferns of Kentucky . University Press of Kentucky. Usage Requirements .

©Ted Bodner. James H. Miller and Karl V. Miller. 2005. Forest plants of the southeast and their wildlife uses. University of Georgia Press., Athens. Provided by University of Georgia Press . Scanned by Forestry Images . Usage Requirements .

Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 3: 483. Provided by Kentucky Native Plant Society . Scanned by Omnitek Inc . Usage Requirements .

slideshow

Synonyms

Symbol Scientific Name
HEDIA Helianthus divaricatus L. var. angustifolius Kuntze

Classification

Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Magnoliopsida – Dicotyledons
Subclass Asteridae
Order Asterales
Family Asteraceae ⁄ Compositae – Aster family
Genus Helianthus L. – sunflower
Species Helianthus divaricatus L. – woodland sunflower

Subordinate Taxa

This plant has no children

Legal Status

Threatened and Endangered Information:
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete protected plant list for that location.
Rhode Island woodland sunflower Special Concern

Wetland Status

Interpreting Wetland Status

Related Links

More Accounts and Images
ARS Germplasm Resources Information Network (HEDI2)
Integrated Taxonomic Information System (HEDI2)
Integrated Taxonomic Information System (HEDIA)
Kemper Center for Home Gardening (HEDI2)
Lady Bird Johnson Wildflower Center Native Plant Information Network (HEDI2)
Native Plants Network (HEDI2)
USF Atlas of Florida Vascular Plants (HEDI2)
University of Tennessee Herbarium (Distribution) (HEDI2)
University of Wisconsin - Stevens Point Freckmann Herbarium (HEDI2)

Wildlife

Food

Source Large Mammals Small Mammals Water Birds Terrestrial Birds
Miller Low Low Low

Cover

Source Large Mammals Small Mammals Water Birds Terrestrial Birds
Miller

Sources

Miller, J.H., and K.V. Miller. 1999. Forest plants of the southeast and their wildlife uses . Southern Weed Science Society.

Description of Values

Value Class Food Cover
High Average 25-50% of diet Regular source of cover
Low 5-10% of diet Infrequently used as cover
Minor 2-5% of diet Sparsely used as cover
Moderate Average 10-25% of diet Occasional source of cover


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Following modified from Flora of North America
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FNA Vol. 21 Page 145, 157 , 158, 163, 165 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 21 | Asteraceae | Helianthus

21. Helianthus divaricatus Linnaeus, Sp. Pl. 2: 906. 1753.

Woodland sunflower

Helianthus divaricatus var. angustifolius Kuntze

Perennials , 20—150 cm (rhizomatous) . Stems erect, usually glabrous , rarely ± hairy (often glaucous). Leaves cauline; opposite; sessile; blades (light to dark green, sometimes whitish abaxially, 3-nerved at bases) lanceolate to lance-ovate, 6—15 × 1—5 cm, bases rounded to cordate, margins subentire to serrate, abaxial faces sparsely hispid to hispidulous, gland-dotted. Heads 1—10. Peduncles 0.5—9 cm. Involucres hemispheric, 10—15 mm diam. Phyllaries 18—25, lanceolate, lance-linear, or lance-ovate, 6—12 × 2—2.5 mm, (margins ciliate) apices acuminate to attenuate, abaxial faces hispidulous to glabrate, not gland-dotted. Paleae 5—8 mm, 3-toothed (apices ciliate). Ray florets 8—12; laminae 15—30 mm. Disc florets 40+; corollas 4.2—5.5 mm, lobes yellow; anthers usually dark brown to black, appendages yellow. Cypselae 3—3.6 mm, glabrate; pappi of 2 aristate scales 2.2—2.5 mm. 2 n = 34.

Flowering summer—early fall. Dry, open sites; 10—900+ m; Ont., Que.; Ala., Ark., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Ky., La., Maine, Md., Mass., Mich., Miss., Mo., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Vt., Va., W.Va., Wis.

One of the earlier flowering perennial Helianthus, H. divaricatus resembles the tetraploid H. hirsutus but differs by its usually glabrous and often glaucous stems, sessile or subsessile leaves, and smaller reproductive organs (disc corollas, paleae, cypselae). Plants from the Ozark region of Arkansas have larger leaves and heads and may represent a polyploid form of H. divaricatus . Natural hybrids with H. microcephalus have been named H . glaucus Small (D. M. Smith and A. T. Guard 1958). Hybrids with other species differ from H. divaricatus in having short but distinct petioles, hairy stems, leaves with more rounded bases, and primary lateral leaf veins diverging in a subopposite manner distal to bases, rather than being strictly opposite and basal.

Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Helianthus+divaricatus&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Helianthus+divaricatus&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

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Number of matches : 16
Query: SELECT * FROM img WHERE ready=1 and taxon like "Helianthus divaricatus%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Helianthus divaricatus
Helianthus divaricatus
ID: 0000 0000 0408 1858 [detail]
© 2008 Louis-M. Landry

Helianthus divaricatus
Helianthus divaricatus
ID: 0000 0000 0408 1859 [detail]
© 2008 Louis-M. Landry

Helianthus divaricatus
Helianthus divaricatus
ID: 0000 0000 0408 1860 [detail]
© 2008 Louis-M. Landry

Helianthus divaricatus
Helianthus divaricatus
ID: 0000 0000 0510 2521 [detail]
© 2010 Louis-M. Landry

Helianthus divaricatus
Helianthus divaricatus
Divaricate Sunflower
ID: 0000 1111 1234 1791 [detail]
© 2016 Keir Morse

Helianthus divaricatus
Helianthus divaricatus
Divaricate Sunflower
ID: 0000 1111 1234 1792 [detail]
© 2016 Keir Morse

Helianthus divaricatus
Helianthus divaricatus
Divaricate Sunflower
ID: 0000 1111 1234 1793 [detail]
© 2016 Keir Morse

Helianthus divaricatus
Helianthus divaricatus
Divaricate Sunflower
ID: 0000 1111 1234 1794 [detail]
© 2016 Keir Morse

Helianthus divaricatus
Helianthus divaricatus
Divaricate Sunflower
ID: 0000 1111 1234 1795 [detail]
© 2016 Keir Morse

Helianthus divaricatus
Helianthus divaricatus
Divaricate Sunflower
ID: 0000 1111 1234 1796 [detail]
© 2016 Keir Morse

Helianthus divaricatus
Helianthus divaricatus
Divaricate Sunflower
ID: 0000 1111 1234 1797 [detail]
© 2016 Keir Morse

Helianthus divaricatus
Helianthus divaricatus
Divaricate Sunflower
ID: 0000 1111 1234 1798 [detail]
© 2016 Keir Morse

Helianthus divaricatus
Helianthus divaricatus
Divaricate Sunflower
ID: 0000 1111 1234 1799 [detail]
© 2016 Keir Morse

Helianthus divaricatus
Helianthus divaricatus
Divaricate Sunflower
ID: 0000 1111 1234 1800 [detail]
© 2016 Keir Morse

Helianthus divaricatus
Helianthus divaricatus
Divaricate Sunflower
ID: 0000 1111 1234 1801 [detail]
© 2016 Keir Morse

Helianthus divaricatus
Helianthus divaricatus
Divaricate Sunflower
ID: 0000 1111 1234 1802 [detail]
© 2016 Keir Morse

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .   


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