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Trichostema dichotomum (Forked bluecurls)
Cressler, Alan

Trichostema dichotomum

Trichostema dichotomum L.

Forked Bluecurls, Blue Curls

Lamiaceae (Mint Family)

Synonym(s): Trichostema dichotomum var. puberulum, Trichostema pilosum

USDA Symbol: TRDI2

USDA Native Status: L48 (N), CAN (N)

A small plant with 2 or 3 blue, 2-lipped flowers at the tips of short branches arising from the leaf axils. Plant sticky.

The long, curled stamens characterize this dainty little plant. The southern Perennial Bluecurls (T. suffrutescens), has tiny oblong leaves and may not be a distinct species. False Pennyroyal (T. brachiatum) has short stamens not protruding from the flowers. It ranges from Quebec to Georgia, west to Texas, and north to Minnesota.


From the Image Gallery

6 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Annual
Habit: Herb
Size Notes: Up to about 28 inches tall.
Fruit: Nutlets.

Bloom Information

Bloom Color: White , Blue , Purple
Bloom Time: Aug , Sep , Oct


USA: AL , AR , CT , DC , DE , FL , GA , IA , IL , IN , KY , LA , MA , MD , ME , MI , MO , MS , NC , NH , NJ , NY , OH , OK , PA , RI , SC , TN , TX , VA , VT , WV
Canada: ON , QC
Native Distribution: Southern Maine south to Florida; west to Texas; north to Missouri and Michigan.
Native Habitat: Dry, open, sandy, or sterile sites.

Growing Conditions

Light Requirement: Sun
Soil Moisture: Dry
Soil Description: Sandy


Conspicuous Flowers: yes

Value to Beneficial Insects

Special Value to Native Bees

This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Naval Air Station Kingsville - Kingsville, TX

Web Reference

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

Additional resources

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


Record Modified: 2023-04-07
Research By: TWC Staff

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