Smoothstem Blazingstar

(Mentzelia laevicaulis)

Smoothstem Blazingstar (Mentzelia laevicaulis)

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Estimated Native Range
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Summary

Mentzelia laevicaulis, commonly known as Smoothstem Blazingstar, is a semi-deciduous biennial or perennial herb native to arid and semi-arid regions, including open woodlands, grasslands, and rocky slopes in the Western North America. It can reach up to 3 feet in height and is characterized by its weedy-looking, branched stem. The whitish-green stem and its lateral branches bear occasional triangular, sawtoothed leaves. The plant is notable for its spectacular yellow flowers that bloom in the summer. Each star-shaped flower has five narrow, pointed petals with shiny yellow surfaces, each up to 3 inches long, and is surrounded by long, curling bracts. The center of the open-faced flower is filled with numerous whiskery yellow stamens, creating a striking display. The plant also bears capsule fruits containing winged seeds, which are dispersed by wind.

Smoothstem Blazingstar is valued for its drought tolerance and striking flowers, making it a suitable choice for xeriscaping, rock gardens, and naturalized areas. It is often used to attract pollinators such as bees and butterflies. This plant requires minimal maintenance, thriving in full sun and well-drained soils. It is adapted to low-water conditions and is an excellent choice for gardeners looking to reduce irrigation needs. While generally pest-free, it can occasionally suffer from root rot if overwatered.CC BY-SA 4.0

Plant Description

  • Plant Type: Herb
  • Height: 1-3 feet
  • Width: 1-3 feet
  • Growth Rate: Rapid
  • Flower Color: Yellow
  • Flowering Season: Summer, Fall
  • Leaf Retention: Semi-Deciduous

Growth Requirements

  • Sun: Full Sun
  • Water: Low
  • Drainage: Medium, Fast

Common Uses

Bee Garden, Low Maintenance, Rock Garden, Showy Flowers

Natural Habitat

native to arid and semi-arid regions, including open woodlands, grasslands, and rocky slopes in the Western North America

Other Names

Common Names: Smooth-Stem Blazingstar, Giant Blazingstar

Scientific Names: , Mentzelia laevicaulis, Nuttallia laevicaulis, Mentzelia laevicaulis var. acuminata, Nuttallia acuminata, Mentzelia acuminata, Bartonia laevicaulis, Bartonia loevicaulis, Bartonia ornata, Hesperaster laevicaulis

GBIF Accepted Name: Mentzelia laevicaulis (Douglas ex Hook.) Torr. & A.Gray