Helianthus niveus ssp. tephrodes, Showy Sunflower,, Southwest Desert Flora

Helianthus niveus ssp. tephrodes, Showy Sunflower

Showy Sunflower has attractive bright yellow flowers with reddish centers that bloom from March to June. Photo taken March 9 at Anza-Borrego Springs area, California. Helianthus niveus

Showy Sunflower has soft or stiff fine white hairs. The bracts (phyllaries) surrounding the head are lanceolate and canescent to soft hairy. Helianthus niveus

Showy Sunflower leaves are light gray- green, mostly alternate and with long stems (petioles); shape lanceolate to ovate, densely stiff- or soft-hairy. Helianthus niveus

Showy Sunflower is a forb/herb or sub-shrub with either stiff or soft hairs. Plants shown here in growing in Anza-Borrego Springs, CA in sandy soil habitat growing side by side with Dune Evening Primrose, Oenothera deltoides, and Desert Sand Verbena, Abronia villosa. Helianthus niveus

Showy Sunflower in an annual or perennial species that is found in open sandy or gravelly areas, open sunny areas, roadsides and disturbed areas in dry or moist conditions. Helianthus niveus

Scientific Name: Helianthus niveus ssp. tephrodes
Common Name: Showy Sunflower

Also Called: Algodone Sunflower, Snowy Sunflower

Family: Asteraceae, Sunflower Family
Synonyms: ()

Status: Native

Duration: Annual to perennial with taproot.

Size: 3 feet (91 cm) tall or more.

Growth Form: Forb/herb, subshrub; stem and leaves covered in soft white appressed hairs.

Leaves: Green or gray-green; blades ovoid to lanceolate to triangular-ovate; leaves arranged alternately along the stems; leaves with long stalks or supporting stems (petioles); leaves also covered in soft white appressed hairs; hairs may be gland-dotted on the base.

Flower Color: Yellow, bright yellow with dark brown or red to red-purple centers; 1 or more flower heads; heads with both ray (13 or more) and disk (many) florets; fruit is a cypsela with a pappus of scales.

Flowering Season: March to May or June, and October to January with sufficient monsoon rainfall; flowers in photo taken March 09 near Anza-Borrego Springs, California.

Habitat Preferences: Open sandy or gravelly areas, open sunny areas, roadsides and disturbed areas, dry or moist areas.

Recorded Range: Showy Sunflower is found in the southwestern United States in AZ, CA, NM, NV, TX. It is also native to Baja California and northwest Mexico.

North America & US County Distribution Map for Helianthus niveus.

North America species range map for Showy Sunflower, Helianthus niveus:
North American range map courtesy of Virginia Tech, Dept. of Forest Resources & Environmental Conservation

Click image for full size map

U.S. Weed Information: Unknown
Invasive/Noxious Weed Information: Unknown
Wetland Indicator: Unknown

Threatened/Endangered Information: Helianthus niveus ssp. tephrodes,
the Algodone Dunes Sunflower is listed as "Rare or Endangered" in California.
CNPS: California Rare Plant Rank: 1B.2; Rare or endangered in California and elsewhere; .2: Fairly endangered in California.

Genus Information: In North America there are 62 species and 62 accepted taxa overall for genus. Worldwide, The Plant List includes 71 accepted species names and a further 128 scientific names of infraspecific rank for the genus.

The genus Helianthus was published by Carl Linnaeus, (1707-1778) in 1753.

In the Southwestern United States: Arizona has 8 species of Helianthus, California has 11 species, Nevada has 7 species, New Mexico has 14 species, Texas has 21 species, Utah has 6 species. Data approximate and subject to revision.

There are 3 sub-species in Helianthus niveus; (2 sub-species in the U.S.)
Helianthus niveus ssp. canescens, Showy Sunflower, (AZ, CA, NM, NV, TX).
Helianthus niveus ssp. tephrodes, Algodone Dunes Sunflower, (AZ, CA),
Helianthus niveus ssp. niveus, (Baja California).

Comments: Showy Sunflower is a forb/herb or sub-shrub with either stiff or soft hairs. Plants in photos above were found at Anza-Borrego Springs, CA in preferred sandy soil habitat growing side by side with Dune Evening Primrose, Oenothera deltoides, and Desert Sand Verbena, Abronia villosa.

There are approximately 62 species in the “Sunflower” genus Helianthus in North America and the Algodone Dunes Sunflower is listed as Rare and Endangered in California.

In Southwestern Desert Flora also see Common Sunflower, Helianthus annuus and Prairie Sunflower, Helianthus petiolaris.

Importance to Wildlife, Birds and Livestock Most “Sunflowers” with their brightly colored flowers and palatable seeds are known to be visited by hummingbirds and/or small mammals in search of food and nectar.

Beneficial Value to Butterflies, Bees and Insects Most “Sunflowers” of the genus Helianthus, with their brightly colored yellow flowers are known to be visited by butterflies, moths and other insects in search of food. Also, Helianthus flowers, leaves and stems serve as an important host for the larvae (caterpillars) of several species of moths and butterflies known to feed on this plant.

Special Value to Native Bees According to The Xerces Society for Invertebrate Conservation, hybrid “Sunflowers”, genus Helianthus, are recognized by pollination ecologists as attracting large numbers of Native bees. Click here and here for more information on their Pollinator Conservation Program.

Etymology: The genus “Helianthus” (Helian'thus:) is derived from two Greek words helios, “sun,” and anthos, “flower,” in reference to the sunflower's supposed tendency to always turn toward the sun.

The genus Helianthus was published by Carl Linnaeus, (1707-1778) in 1753.

The species epithet “niveus” (niv'eus:) means snow-white.

Ethnobotany

Unknown