Skip to main content

Ten-petal mentzelia

Also known as: chalk lily, candleflower, evening starflower

Mentzelia decapetala (Pursh) Urban

Images

Click on image to view full size

Ten-petal mentzelia flower
Ten-petal mentzelia
Ten-petal mentzelia stamens
Ten-petal mentzelia
Ten-petal mentzelia bracts
Ten-petal mentzelia
Ten-petal mentzelia

Morphology

Stem
Erect, stout, 1 to several, branched above; bark whitish, peeling off lower portions of stem.
Leaves
Alternate, simple, short-stalked below, sessile above, lanceolate, 2 to 6 inches long, .5 to 1.5 inch wide, rough; margins toothed to wavy; tips tapering to points.
Inflorescence
Cyme-like, 1 or few-flowered, near branch tips; bracts pinnately cleft, some partially fused to ovary.
Flower
Showy, 3 to 6 inches in diameter; sepals 5, 1/2 to 2 inches long, pointed; petals 10, white to creamy white, oblanceolate to spatulate, 1 to 3 inches long, 1/2 to 3/4 inch wide, often touch or overlap at flowering; tips pointed; stamens 200-300, shorter than petals.
Fruit
Capsules, cylindric, 3/4 to 2 inches long, 1/2 to 3/4 inch wide, dried sepals at top; seeds numerous, flattened, winged.

Ecology

Habitat
Dry, rocky hillsides, steep banks and slopes, roadsides, disturbed areas, and rocky outcrops. Rarely found in sandy soils.
Distribution
West 3/5 of Kansas.

Practical Information

Toxicity
Plants accumulate selenium and can be mildly poisonous.
Forage Value
Livestock rarely eat ten-petal mentzelia but birds will consume the seeds.

Additional Notes

Comments

The flowers open late in the afternoon and close during the night. Ten-petal mentzelia has a strong, deep taproot and will not withstand transplanting. The rough leaves can cling to clothing or hair.

Special Notes: Resembles Upright mentzelia
Quick Facts
Plant Type
Wildflower
Family
Loasaceae - Stickleaf Family
Life Span
Biennial
Height
1-3 feet
Last Updated
2007-10-20
Color Groups
White, Green & Greenish White Wildflowers
Flowering Period
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Blooms: July, August, September