Learn More Details About This Plant

Plant Data

Names and Taxonomy

  • Common Names: Giant Blazingstar, Smoothstem Blazingstar, Smoothstem Blazing-star, Blazing-star Mentzelia
  • Synonyms: Bartonia laevicaulis, Mentzelia laevicaulis var. acuminata, Nuttallia laevicaulis
  • Family: Loasaceae
  • Genus Information: CA: 36, NV: 27, AZ: 21, UT: 26, NM: 17, CO: 15

Habit and Size

  • Duration: Biennial, Perennial
  • Type: Herb
  • Habit: Erect
  • Shape: Irregular
  • Size: 3' x 2'
  • Stem: Whitish-green, single but highly branched, harshly scabrid-pubescent, becoming smooth relative to upper parts near the base

Leaves

  • Color: silvery-green, whitish-green
  • Shape: Oblanceolate (lower), oblong to ovate-oblong (upper)
  • Edge: Deeply pinnatifid or sawtoothed, wavy-margined
  • Ligule-Petiole:
  • Arrangement: Alternate
  • Leaf Retention: Summer deciduous / dormant

Flowers and Fruit

  • Sex: Hermaphroditic
  • Flower Color: Lemon yellow, shiny yellow surfaces
  • Flower Size: 1.5 to 6 inches in diameter
  • Number of Petals: 5 narrow, pointed, oblong-lanceolate petals
  • Bloom: June–October
  • Fruit: Woody, cylindrical capsule 1.5–3.5 cm long containing flat, winged seeds

Habitat and Growing Conditions

  • Water Use: Low
  • Light: Full Sun
  • Soil: Sandy, Rocky, Gravelly, Well-draining
  • Habitat: Barren slopes, washes, roadcuts, disturbed gravel areas, and plains

Distribution

  • Distribution: Western North America from British Columbia south through Washington, Oregon, and California, and east to Idaho, Montana, Wyoming, Nevada, Utah, and Colorado
  • Seen: Location or date of observation
  • Elevation: 100 ft (30 m) to 8,850 ft (2,700 m)

Gallery

Mentzelia laevicaulis

A spectacular encounter with the glowing evening blooms and texture of the Giant Blazingstar.

Mentzelia laevicaulis

A spectacular encounter with the glowing evening blooms and texture of the Giant Blazingstar.

Mentzelia laevicaulis

A spectacular encounter with the glowing evening blooms and texture of the Giant Blazingstar.

Mentzelia laevicaulis

A spectacular encounter with the glowing evening blooms and texture of the Giant Blazingstar.