Sunflower (7)

Sunflowers follow the sun, facing east in the morning and west by sunset. They share bright yellow flower heads. The shape of the leaves, their habitat and their phyllaries, which circle the underside of the flower head, differentiate them.

Helianthella quinquenervis

Little Sunflower
Helianthella quinquenervis

Family: Sunflower (Asteraceae)
AKA: Aspen Sunflower, Five-nerve Helianthella
Photo taken on: August 14, 2005
Location: West Maroon Trail, GV, CO
Life Zones: Montane to subalpine
Habitat: Moist meadows and woods

Grows to 4ft tall with a single flower per stalk. The flower has a yellow disk. The leaves have five prominent veins.

Flora of North America reference.

Helianthella uniflora

One-flowered Little Sunflower
Helianthella uniflora

Family: Sunflower (Asteraceae)
AKA: Aspen Sunflower, Oneflower Helianthella
Photo taken on: July 7, 2010
Location: Cement Creek, GV, CO
Life Zones: Plains to subalpine
Habitat: Clearings in woods, trail sides

Grows to 3ft tall with single flower heads. The leaves are usually three-veined compared to the Five-nerved Little Sunflower.

Flora of North America reference.

Helianthus  pauciflorus

Stiff Sunflower
Helianthus pauciflorus

Family: Sunflower (Asteraceae)
AKA: Prairie Sunflower, Few-leaved Sunflower
Photo taken on: September 18, 2011
Location: Wet Mountains, Eastern CO
Life Zones: Plains to foothills
Habitat: Disturbed soil, roadsides

Grows to 4ft tall with a dark red-brown disk and reddish, bristly stems that are leafless at the top. Leaves are oval to lance-shaped and rough with short stalks. Phyllaries are oval, pointed and hairy.

Helianthus pauciflorus

Flora of North America reference.

Helianthus petiolaris

Prairie Sunflower
Helianthus petiolaris

Family: Sunflower (Asteraceae)
AKA: Plains Sunflower, Petioled Sunflower
Photo taken on: September 20, 2014
Location: Abiquiu, NM
Life Zones: Plains to foothills
Habitat: Disturbed soil, roadsides, open sunny areas

Grows to 6ft tall with a dark red-brown disk and reddish, hairy stem. Leaves are bluish-green, narrowly lance-shaped with long stalks. Phyllaries are lance-shaped and hairy.

Helianthus petiolaris

Flora of North America reference.

Helianthus annuus

Common Sunflower
Helianthus annuus

Family: Sunflower (Asteraceae)
AKA: Annual Sunflower
Photo taken on: October 11, 2010
Location: Bandelier National Monument, NM
Life Zones: Plains to foothills
Habitat: Disturbed soil, roadsides

Grows to 9ft tall, widely branching, with reddish, hairy stems. Leaves are heart-shaped, rough and coarsely toothed with long stalks. The disk is reddish-purple. Phyllaries are broad and oval.

Helianthus annuus

Flora of North America reference.

Helianthus annuusHelianthus annuus

These plants growing in the wild have escaped from one of the many cultivated varieties of H. annuus. These varieties range in size from 3ft to over 8ft tall. Many of the cultivated plants do not grow true from seed and will eventually revert back to the wild type plants over a few generations.

Helianthus maximiliani

Maximilian's Sunflower
Helianthus maximiliani

Family: Sunflower (Asteraceae)
AKA:
Photo taken on: September 6, 2012
Location: Rio Chama, Abiquiu, NM
Life Zones: Plains and foothills
Habitat: Moist areas, ditches, stream sides

Grows un-branched to 10 feet tall with numerous flower heads and narrow, light green, folded leaves that are up to 12" long and curve downwards from the stem. Flowers are 2-3" across. The ray and disk flowers are yellow surrounded by long, slender, pointed bristly bracts.

Flora of North America reference.

	Helianthus microcephalus

Small Woodland Sunflower
Helianthus microcephalus

Family: Sunflower (Asteraceae)
AKA: Woodlands Sunflower
Photo taken on: September 21, 2014
Location: Abiquiu, NM
Life Zones: Plains to foothills
Habitat: Open woodlands, roadsides

Grows from 8" to 4ft with smooth stems except below the flower head. Leaves are lance-shaped. Flower heads are less than 2" across and have only 5-8 rays and lance-shaped phyllaries with bristly edges and 15-20 yellow disk florets. This species has not been collected in New Mexico but it keys out.

Helianthus microcephalus

Flora of North America reference.

Yellow Single Flowers