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Houstonia pusilla (Tiny bluets)
Cressler, Alan

Houstonia pusilla

Houstonia pusilla Schoepf

Tiny Bluets, Small Bluets, Star Violet

Rubiaceae (Madder Family)

Synonym(s): Hedyotis caerulea var. minima, Hedyotis caerulea var. minor, Hedyotis crassifolia, Hedyotis minima, Houstonia minima, Houstonia patens

USDA Symbol: HOPU3

USDA Native Status: L48 (N)

The Star Violet has purple-blue flowers 1/4-1/3 inch across growing singly on the tips of fine branches. Each blossom consists of a narrow tube crowned by 4 lobes which spread sharply at right angles. The plant grows 4-6+ inches tall with several branches. Though very small, star violets sometimes color a field blue. The opposite leaves are not more than 1/2 inch long, with the flower stem growing out of the leaf axil.


From the Image Gallery

16 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Annual
Habit: Herb
Leaf Complexity: Simple
Fruit Type: Capsule
Size Notes: Up to about 10 inches tall.

Bloom Information

Bloom Color: Blue , Purple , Violet
Bloom Time: Mar , Apr , May


USA: AL , AR , AZ , DE , FL , GA , IA , IL , IN , KS , KY , LA , MD , MO , MS , NC , OK , SC , SD , TN , TX , VA

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:

Fredericksburg Nature Center - Fredericksburg, TX
Lady Bird Johnson Wildflower Center - Austin, TX
Brackenridge Field Laboratory - Austin, TX
Stengl Biological Research Station - Smithville, TX


Bibref 248 - Texas Wildflowers: A Field Guide (1984) Loughmiller, C. & L. Loughmiller

Search More Titles in Bibliography

Web Reference

Webref 57 - Atlas of Florida Plants (2020) Institute for Systematic Botany
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

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


Record Modified: 2023-05-15
Research By: TWC Staff

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