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Helianthus petiolaris . Nutt
LESSER SUNFLOWER
Prairie sunflower

Life   Plantae   Dicotyledoneae   Asteraceae   Helianthus

Helianthus petiolaris, leaf and flower
© Kay Yatskievych, 2003 · 1
Helianthus petiolaris, leaf and flower

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Associates · map
FamilyScientific name @ source (records)
Andrenidae  Andrena accepta @ I_ADG (1)

Andrena haynesi @ AMNH_BEE (7); I_ADG (1)

Andrena helianthi @ AMNH_BEE (6); I_ADG (1)

Perdita bruneri @ AMNH_BEE (2)

Perdita labergei @ BBSL (1)

Perdita laticincta @ AMNH_BEE (32)

Perdita swenki @ AMNH_BEE (7)

Perdita tridentata @ BBSL (2); AMNH_BEE (14)

Perdita verbesinae @ BBSL (28)

Pseudopanurgus aethiops @ BBSL (1); I_ADG (1)

Pseudopanurgus innuptus @ I_ADG (1)

Pseudopanurgus renimaculatus @ AMNH_BEE (2)

Pseudopanurgus simulans @ AMNH_BEE (8)
Apidae  Bombus fervidus @ AMNH_BEE (7)

Bombus huntii @ AMNH_BEE (1)

Bombus variabilis @ AMNH_BEE (1)

Epeolus minimus @ AMNH_BEE (2)

Melissodes agilis @ AMNH_BEE (6)

Melissodes coreopsis @ AMNH_BEE (1)

Melissodes druriella @ AMNH_BEE (1)

Melissodes gelida @ AMNH_BEE (1)

Melissodes glenwoodensis @ AMNH_BEE (1)

Melissodes perlusa @ AMNH_BEE (6)

Melissodes plumosa @ AMNH_BEE (1)

Melissodes wheeleri @ AMNH_BEE (1)

Nomada sp @ I_ADG (1)

Nomada vegana @ BBSL (2)

Nomada vincta @ BBSL (1)

Nomada zebrata @ I_ADG (1)

Triepeolus dacotensis @ AMNH_BEE (1)

Triepeolus helianthi @ AMNH_BEE (1)
Bombyliidae  Phthiria sulphurea @ I_ADG (1)
Colletidae  Colletes rufocinctus @ AMNH_BEE (5)

Colletes simulans @ AMNH_BEE (1)

Colletes susannae @ AMNH_BEE (1)

Hylaeus leptocephalus @ AMNH_BEE (1)
Erysiphaceae  Erysiphe cichoracearum @ BPI (4)
Halictidae  Agapostemon splendens @ AMNH_BEE (1)

Dufourea marginata @ BBSL (7)

Dufourea maura @ I_ADG (1)

Halictus ligatus @ AMNH_BEE (2)

Lasioglossum leucocomum @ AMNH_BEE (1)

Lasioglossum microlepoides @ BBSL (1)

Lasioglossum paraforbesii @ AMNH_BEE (1)

Lasioglossum pectorale @ AMNH_BEE (1)

Lasioglossum semicaeruleum @ AMNH_BEE (3)

Lasioglossum succinipenne @ AMNH_BEE (1)
Megachilidae  Coelioxys octodentata @ AMNH_BEE (1)

Dianthidium curvatum @ AMNH_BEE (7)

Hoplitis pilosifrons @ AMNH_BEE (1)

Megachile casadae @ I_ADG (1)

Megachile dentitarsus @ AMNH_BEE (1)

Megachile inimica @ AMNH_BEE (1)

Megachile parallela @ AMNH_BEE (4)

Trachusa cordaticeps @ BBSL (12)

Trachusa occidentalis @ BBSL (17)

Trachusa zebrata @ BBSL (12)
Melittidae  Hesperapis carinata @ AMNH_BEE (28)
Miridae  Lygus shulli @ CSUC_TCN (4)
Mycosphaerellaceae  Septoria helianthi @ BPI (3)
Pucciniaceae  Puccinia helianthi-mollis @ BPI (1)

Puccinia helianthi @ BPI (56)

Puccinia tanaceti @ BPI (6)
Reduviidae  Phymata americana @ UCR_ENT (1)

Sinea @ AMNH_PBI (1)
_  Sphaeronaema helianthi @ BPI (1)

Tiryus fuscosignatus @ AMNH_PBI (1)

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Following modified from Plants Database, United States Department of Agriculture
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http://plants.usda.gov/java/profile?symbol=HEPE ---> https://plants.usda.gov/java/profile?symbol=HEPE
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Following modified from Flora of North America
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Link to Flora of North America home
 
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FNA Vol. 21 Page 142, 150, 151, 152 , 153 , 154, 155 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 21 | Asteraceae | Helianthus

9. Helianthus petiolaris Nuttall, J. Acad. Nat. Sci. Philadelphia. 2: 115. 1821.

Prairie sunflower

Annuals, 40—200 cm. Stems erect, usually densely canescent, hispid, or strigillose, rarely ± hirsute or glabrate. Leaves mostly cauline; mostly alternate; petioles 2—4 cm; blades (often bluish green) lanceolate to deltate-ovate or ovate, 4—15 × 1—8 cm, bases subcordate or truncate to cuneate, margins entire or ± serrate, abaxial faces strigose, sparsely to densely, or not at all, gland-dotted. Heads 1—5. Peduncles 4—15(—40) cm. Involucres ± hemispheric, 10—24 mm diam. Phyllaries 14—25, lance-linear to lanceolate to lance-ovate, 10—14 × 1—4(—5) mm, (margins sometimes ciliate) apices short-attenuate, abaxial faces usually hispidulous, rarely sparsely hirsute to glabrate. Paleae 4.5—7.5 mm, 3-toothed, middle teeth ± ciliate or bearded, hairs whitish, 0.5—0.7 mm. Ray florets 10—30; laminae 15—20 mm. Disc florets 50—100+; corollas 4.5—6 mm, lobes usually reddish, rarely yellow; anthers reddish to purplish, appendages purplish (style branches reddish). Cypselae 3—4.5 mm, ± villous; pappi of 2 aristate scales 1.5—3 mm plus 0—2 erose scales 0.3—0.5 mm. 2 n = 34.

Subspecies 2 (2 in the flora): w North America.

Helianthus petiolaris is adventive beyond western North America.

A third subspecies has yet to be named at that rank in Helianthus petiolaris ; it has been called H. petiolaris var. canescens A. Gray. It differs in having stems, leaves, and phyllaries densely canescent and abaxial faces of leaves densely gland-dotted. It is additionally characterized by peduncles usually ebracteate, phyllaries 1—2 mm wide, disc corolla throats gradually narrowed distal to slight, not densely hairy basal bulges, and 2 n = 34. It flowers late spring through late summer and grows on sandy soils in open areas at (10—)1000—2300 m in Arizona, California, Nevada, New Mexico, and Texas and in Mexico. It was treated as H. niveus (Bentham) Brandegee subsp. canescens (A. Gray) Heiser by C. B. Heiser et al. (1969); molecular and morphologic data appear to favor a placement within H. petiolaris .

Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Helianthus+petiolaris+ssp.+petiolaris&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+petiolaris+ssp.+petiolaris&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant
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Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Helianthus+petiolaris+ssp.+canescens&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+petiolaris+ssp.+canescens&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant
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Following modified from CalPhotos
   Top | See original

http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Helianthus+petiolaris&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+petiolaris&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant
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Updated: 2017-11-22 02:45:57 gmt
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