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Leptosiphon grandiflorus (Largeflower linanthus)
Bodger, Jack B.

Leptosiphon grandiflorus

Leptosiphon grandiflorus (Benth.) J.M. Porter & L.A. Johnson

Largeflower Linanthus, Large-flower Desert-trumpets, Mountain Phlox

Polemoniaceae (Phlox Family)

Synonym(s): Linanthus grandiflorus

USDA Symbol: LEGR23

USDA Native Status: L48 (N)

A low-growing, long-blooming, branched or unbranched annual, 4-20 in. high. Stems are encircled by whorls of dark-green leaves, deeply cleft into inch-long, linear segments. The silky, fragrant, phlox-like, lilac, pink or white flowers occur in clusters at the tops of the stems.

This wildflower forms dense colonies in the spring, then usually dies out by summer.


From the Image Gallery

10 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Annual
Habit: Herb
Fruit Type: Capsule
Size Notes: Up to about 20 inches tall, usually shorter.
Leaf: Green

Bloom Information

Bloom Color: White , Pink , Purple
Bloom Time: Apr , May , Jun , Jul , Aug


Native Distribution: In CA, Santa Barbara Co. & w. Merced Co.
Native Habitat: Open woods & sandy places below 3500 ft.

Growing Conditions

Water Use: Medium
Light Requirement: Sun
CaCO3 Tolerance: Medium
Soil Description: Sandy soils.
Conditions Comments: Soil should be moist only while seedlings are growing. Mountain phlox forms dense colonies in the spring, then usually dies out by summer.


Conspicuous Flowers: yes


Description: Sow seeds 1/8-1/4 in. deep in desired locations in autumn. Protection from birds may be necessary.
Seed Treatment: No treatment necessary.
Commercially Avail: yes

Web Reference

Webref 30 - Calflora (2018) Calflora
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Leptosiphon grandiflorus in USDA Plants
FNA: Find Leptosiphon grandiflorus in the Flora of North America (if available)
Google: Search Google for Leptosiphon grandiflorus


Record Modified: 2023-02-15
Research By: TWC Staff

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