Asteraceae: Helianthus angustifolius (narrow leaf sunflower) species page from Bioimages
Asteraceae: Helianthus angustifolius species image page from CalPhotos
Asteraceae: Helianthus angustifolius (swamp sunflower) species page from Forestry Images
Asteraceae: Helianthus annuus - Disk floret compared with those of an Aster (left) - photo: Hugh Wilson
Asteraceae: Helianthus annuus (zoom) - maturing capitulum with Toni Wilson - Herb Garden - Quail Hollow State Park, Stark County, Ohio - photo: Hugh Wilson
Asteraceae: Helianthus annuus from Arches National Park, Moab, Utah, USA
Asteraceae: Helianthus annuus species image page from CalPhotos
Asteraceae: Helianthus annuus species page from Chihuahuan Desert Plants
Asteraceae: Helianthus annuus (common sunflower) species page from Forestry Images
Asteraceae: Helianthus annuus species image page from Vascular Plants of the Gila Wilderness (USA - New Mexico)
Asteraceae: Helianthus annuus (Sunflower) species page from the Flowers of India
Asteraceae: Helianthus annuus species page from the Flowers in Israel
Asteraceae: Helianthus annuus - Cultivated. (involucres) - photo: James Manhart
Asteraceae: Helianthus annuus - Cultivated. (head) - photo: James Manhart
Asteraceae: Helianthus annuus - Cultivated. (head - close-up) - photo: James Manhart
Asteraceae: Helianthus annuus - Cultivated. (head - close-up) - photo: James Manhart
Asteraceae: Helianthus annuus - Cultivated. (receptacle) - photo: James Manhart
Asteraceae: Helianthus annuus - Cultivated. (floret -ray) - photo: James Manhart
Asteraceae: Helianthus annuus - Cultivated. (floret - disc) - photo: James Manhart
Asteraceae: Helianthus annuus - Cultivated. (floret - disc) - photo: James Manhart
Asteraceae: Helianthus annuus (fruit - achene)
Asteraceae: Helianthus annuus species image page from Kansas Wildflowers and Grasses
Asteraceae: Helianthus annuus species image page from Missouri Plants
Asteraceae: Helianthus annuus from Oregon Flora Image Project
Asteraceae: Helianthus annuus pollen images (SEM) from University of Arizona Palynology
Asteraceae: Helianthus annuus species image page from Flora of the cismontane Santa Ana Mountains of Southern California
Asteraceae: Helianthus annuus species page from Image Libarary - Southwest Environmental Infomation Network
Asteraceae: Helianthus annuus (Common sunflower) image page from Pasture and Roadside Flowering Plants of Goodwell and Texhoma, Texas County, Oklahoma
Asteraceae: Helianthus annuus species image page from BIO 406D (University of Texas)
Asteraceae: Helianthus annuus species image page from Native Plants of South Texas
Asteraceae: Helianthus annuus 'Ring of Fire' (Sunflower 'Ring of Fire) species page from the Flowers of India
Asteraceae: Helianthus anomala species image page from CalPhotos
Asteraceae: Helianthus anomalus species page from Image Libarary - Southwest Environmental Infomation Network
Asteraceae: Helianthus argophyllus (zoom) - Vegetative plant; cultivated at Mimosa Farm, Brazos County, Texas (site overview) - photo: Hugh Wilson
Asteraceae: Helianthus argophyllus (zoom) - Capitulum, sectioned; cultivated at Mimosa Farm, Brazos County, Texas (site overview) - photo: Hugh Wilson
Asteraceae: Helianthus argophyllus (zoom) - Capitulum, from below with phyllaries; cultivated at Mimosa Farm, Brazos County, Texas (site overview) - photo: Hugh Wilson
Asteraceae: Helianthus argophyllus (zoom) - Capitulum, from above; cultivated at Mimosa Farm, Brazos County, Texas (site overview) - photo: Hugh Wilson
Asteraceae: Helianthus argophyllus (zoom) - Plant in flower; cultivated at Mimosa Farm, Brazos County, Texas (site overview) - photo: Hugh Wilson
Asteraceae: Helianthus arizonensis species image page from New Mexico Rare Plants
Asteraceae: Helianthus arizonensis species page from Image Libarary - Southwest Environmental Infomation Network
Asteraceae: Helianthus bolanderi species image page from CalPhotos
Asteraceae: Helianthus californicus species image page from CalPhotos
Asteraceae: Helianthus ciliaris species image page from CalPhotos
Asteraceae: Helianthus ciliaris species image page from Vascular Plants of the Gila Wilderness (USA - New Mexico)
Asteraceae: Helianthus ciliaris species page from Image Libarary - Southwest Environmental Infomation Network
Asteraceae: Helianthus ciliaris (Texas blueweed) image page from Pasture and Roadside Flowering Plants of Goodwell and Texhoma, Texas County, Oklahoma
Asteraceae: Helianthus debilis ssp. cucumerifolius (zoom) - Capitulum from above; Thornberry Ranch, Trinity River bottoms, eastern Madison County, Texas (site overview) - photo: Hugh Wilson
Asteraceae: Helianthus debilis ssp. cucumerifolius (zoom) - Capitulum from below with phyllaries; Thornberry Ranch, Trinity River bottoms, eastern Madison County, Texas (site overview) - photo: Hugh Wilson
Asteraceae: Helianthus debilis ssp. cucumerifolius (zoom) - Capitulum past anthesis from above with phyllaries; Thornberry Ranch, Trinity River bottoms, eastern Madison County, Texas (site overview) - photo: Hugh Wilson
Asteraceae: Helianthus debilis ssp. cucumerifolius (zoom) - Capitulum past anthesis sectioned with fruit; Thornberry Ranch, Trinity River bottoms, eastern Madison County, Texas (site overview) - photo: Hugh Wilson
Asteraceae: Helianthus debilis ssp. cucumerifolius (zoom) - Capitulum at anthesis sectioned; Thornberry Ranch, Trinity River bottoms, eastern Madison County, Texas (site overview) - photo: Hugh Wilson
Asteraceae: Helianthus debilis ssp. vestitus (zoom) - Inflorescence from above; hideaway beach, Marco Island, Florida - photo: Hugh Wilson
Asteraceae: Helianthus debilis ssp. vestitus (zoom) - Inflorescence from below, phyllaries; hideaway beach, Marco Island, Florida - photo: Hugh Wilson
Asteraceae: Helianthus debilis ssp. vestitus (zoom) - Infructescence from the side, phyllaries; hideaway beach, Marco Island, Florida - photo: Hugh Wilson
Asteraceae: Helianthus debilis ssp. vestitus (zoom) - Infructescence from the side, sectioned with fruit, chaff; hideaway beach, Marco Island, Florida - photo: Hugh Wilson
Asteraceae: Helianthus debilis ssp. vestitus (zoom) - Leafy shoot from above; hideaway beach, Marco Island, Florida - photo: Hugh Wilson
Asteraceae: Helianthus debilis (Beach Sunflower) species page from the Flowers of India
Asteraceae: Helianthus decapetalus species image page from CalPhotos
Asteraceae: Helianthus decapetalus species page from the Connecticut Botanical Society
Asteraceae: Helianthus deserticola species image page from CalPhotos
Asteraceae: Helianthus divaricatus species page from the Connecticut Botanical Society
Asteraceae: Helianthus divaricatus (woodland sunflower) species page from Forestry Images
Asteraceae: Helianthus divaricatus species image page from Missouri Plants
Asteraceae: Helianthus eggertii (Eggert's sunflower) species page from Bioimages
Asteraceae: Helianthus exilis species image page from CalPhotos
Asteraceae: Helianthus giganteus species image page from CalPhotos
Asteraceae: Helianthus giganteus species page from the Connecticut Botanical Society
Asteraceae: Helianthus gracilentus species image page from CalPhotos
Asteraceae: Helianthus grosseserratus species image page from Kansas Wildflowers and Grasses
Asteraceae: Helianthus grosseserratus species image page from Missouri Plants
Asteraceae: Helianthus hirsutus (zoom) - Leaves; cultivated at Mimosa Farm, Brazos County, Texas (site overview) - photo: Hugh Wilson
Asteraceae: Helianthus hirsutus (zoom) - Plant in flower; cultivated at Mimosa Farm, Brazos County, Texas (site overview) - photo: Hugh Wilson
Asteraceae: Helianthus hirsutus - inflorescence - small - photo: Hugh Wilson
Asteraceae: Helianthus hirsutus - inflorescence - large - photo: Hugh Wilson
Asteraceae: Helianthus hirsutus - population - photo: Hugh Wilson
Asteraceae: Helianthus hirsutus - inflorescence section 1 - photo: Hugh Wilson
Asteraceae: Helianthus hirsutus - phyllaries - photo: Hugh Wilson
Asteraceae: Helianthus hirsutus - inflorescence from top - close - photo: Hugh Wilson
Asteraceae: Helianthus hirsutus - inflorescence section 2 - photo: Hugh Wilson
Asteraceae: Helianthus hirsutus - inflorescence section 2 - close - photo: Hugh Wilson
Asteraceae: Helianthus hirsutus (hairy sunflower) species page from Forestry Images
Asteraceae: Helianthus hirsutus species image page from Missouri Plants
Asteraceae: Helianthus laciniatus species page from Image Libarary - Southwest Environmental Infomation Network
Asteraceae: Helianthus maximiliani (zoom) - Infructescence; cultivated, Lady Bird Johnson Wildflower Center, Austin, Texas - photo: Hugh Wilson
Asteraceae: Helianthus maximiliani (zoom) - Infructescence, sectioned; cultivated, Lady Bird Johnson Wildflower Center, Austin, Texas - photo: Hugh Wilson
Asteraceae: Helianthus maximiliani (zoom) - Capitulum past anthesis with phyllaries; Bovay Boy Scout Ranch, Grimes County, Texas - photo: Hugh Wilson
Asteraceae: Helianthus maximiliani (zoom) - Leaf; Bovay Boy Scout Ranch, Grimes County, Texas - photo: Hugh Wilson
Asteraceae: Helianthus maximiliani species page from Chihuahuan Desert Plants
Asteraceae: Helianthus maximiliani (Maximilian sunflower) species page from Forestry Images
Asteraceae: Helianthus maximiliani species image page from Missouri Plants
Asteraceae: Helianthus maximiliani species page from Image Libarary - Southwest Environmental Infomation Network
Asteraceae: Helianthus maximiliani species image page from BIO 406D (University of Texas)
Asteraceae: Helianthus maximilianii species image page from Kansas Wildflowers and Grasses
Asteraceae: Helianthus microcephalus (small headed sunflower) species page from Bioimages
Asteraceae: Helianthus microcephalus species image page from Missouri Plants
Asteraceae: Helianthus mollis (zoom) - inflorescences; restored prairie at the Stark Wilderness Center, Stark County, Ohio - photo: Hugh Wilson
Asteraceae: Helianthus mollis (zoom) - phyllaries; restored prairie at the Stark Wilderness Center, Stark County, Ohio - photo: Hugh Wilson
Asteraceae: Helianthus mollis (zoom) - leaves; restored prairie at the Stark Wilderness Center, Stark County, Ohio - photo: Hugh Wilson
Asteraceae: Helianthus mollis (zoom) - capitulum past anthesis, disk florets; restored prairie at the Stark Wilderness Center, Stark County, Ohio - photo: Hugh Wilson
Asteraceae: Helianthus mollis (zoom) - fasciated and normal capitula; restored prairie at the Stark Wilderness Center, Stark County, Ohio - photo: Hugh Wilson
Asteraceae: Helianthus mollis species image page from Missouri Plants
Asteraceae: Helianthus niveus species page from Image Libarary - Southwest Environmental Infomation Network
Asteraceae: Helianthus niveus ssp. canescens species image page from CalPhotos
Asteraceae: Helianthus niveus ssp. canescens species page from Image Libarary - Southwest Environmental Infomation Network
Asteraceae: Helianthus niveus ssp. tephrodes species image page from CalPhotos
Asteraceae: Helianthus nuttallii (Nuttall's sunflower) species page from Forestry Images
Asteraceae: Helianthus nuttallii species page from Image Libarary - Southwest Environmental Infomation Network
Asteraceae: Helianthus nuttallii ssp. nuttallii species image page from CalPhotos
Asteraceae: Helianthus occidentalis (fewleaf sunflower) species page from Forestry Images
Asteraceae: Helianthus occidentalis species image page from Missouri Plants
Asteraceae: Helianthus paradoxus species image page from CalPhotos
Asteraceae: Helianthus paradoxus species image page from New Mexico Rare Plants
Asteraceae: Helianthus pauciflorus species image page from Kansas Wildflowers and Grasses
Asteraceae: Helianthus petiolaris from Arches National Park, Moab, Utah, USA
Asteraceae: Helianthus petiolaris species page from Chihuahuan Desert Plants
Asteraceae: Helianthus petiolaris (prairie sunflower) species page from Forestry Images
Asteraceae: Helianthus petiolaris species image page from Vascular Plants of the Gila Wilderness (USA - New Mexico)
Asteraceae: Helianthus petiolaris species image page from Kansas Wildflowers and Grasses
Asteraceae: Helianthus petiolaris species page from Image Libarary - Southwest Environmental Infomation Network
Asteraceae: Helianthus petiolaris (Plains sunflower) image page from Pasture and Roadside Flowering Plants of Goodwell and Texhoma, Texas County, Oklahoma
Asteraceae: Helianthus petiolaris ssp. fallax species page from Image Libarary - Southwest Environmental Infomation Network
Asteraceae: Helianthus praetermissus species image page from New Mexico Rare Plants
Asteraceae: Helianthus radula (rayless sunflower) species page from Forestry Images
Asteraceae: Helianthus rigidus species image page from Kansas Wildflowers and Grasses
Asteraceae: Helianthus salicifolius species image page from Kansas Wildflowers and Grasses
Asteraceae: Helianthus schweinitzii (Schweinitz's sunflower) species page from Forestry Images
Asteraceae: Helianthus silphioides species image page from Missouri Plants
Asteraceae: Helianthus sp. species image page from CalPhotos
Asteraceae: Helianthus spp. (sunflower) species page from Forestry Images
Asteraceae: Helianthus strumosus species image page from Missouri Plants
Asteraceae: Helianthus tuberosus - Tubers ready to steam - Bloomington, Indiana - photo: Hugh Wilson
Asteraceae: Helianthus tuberosus species image page from CalPhotos
Asteraceae: Helianthus tuberosus species page from the Connecticut Botanical Society
Asteraceae: Helianthus tuberosus (Jerusalem artichoke) species page from Forestry Images
Asteraceae: Helianthus tuberosus species image page from Josef Hlasek - Wildlife Photo Gallery
Asteraceae: Helianthus tuberosus species image page from Josef Hlasek - Wildlife Photo Gallery
Asteraceae: Helianthus tuberosus species image page from Kansas Wildflowers and Grasses
Asteraceae: Helianthus verticillatus (whorled sunflower) species page from Bioimages
Asteraceae: Silphium terebinthinaceum (zoom) - phyllaries (right) vs. Helianthus (left); in restored prairie area - Quail Hollow State Park, Stark County, Ohio - photo: Hugh Wilson