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Houstonia longifolia (Longleaf summer bluet)
Cressler, Alan

Houstonia longifolia

Houstonia longifolia Gaertn.

Longleaf Summer Bluet, Pale Bluets

Rubiaceae (Madder Family)

Synonym(s): Hedyotis longifolia, Hedyotis longifolia var. tenuifolia, Hedyotis nuttalliana, Hedyotis purpurea var. longifolia, Hedyotis purpurea var. tenuifolia, Houstonia longifolia var. compacta, Houstonia longifolia var. glabra, Houstonia longifolia var. tenuifolia, Houstonia purpurea var. tenuifolia, Houstonia tenuifolia, Oldenlandia purpurea var. tenuifolia


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

Clumps of basal leaves, larger than those of H. caerulea, form clumps to 1 ft. high. The dainty, tubular flowers of this perennial are pale, pinkish-white to purplish.


From the Image Gallery

10 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Complexity: Simple
Fruit Type: Capsule
Size Notes: Up to about 1 foot tall.

Bloom Information

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


USA: AL , AR , CT , DC , FL , GA , IL , IN , KS , KY , MA , MD , ME , MI , MN , MO , MS , NC , ND , NH , NJ , NY , OH , OK , PA , RI , SC , TN , VA , VT , WI , WV
Canada: ON
Native Distribution: ME to Sask., s. to GA & LA
Native Habitat: Open, sandy or rocky places; heath balds; deciduous woods

Growing Conditions

Light Requirement: Sun , Part Shade , Shade
Soil Moisture: Dry
Soil pH: Acidic (pH<6.8)
Drought Tolerance: High
Soil Description: Moist, sandy or gravelly soils.


Conspicuous Flowers: yes


Description: Plant seeds outside as soon as ripe or store, stratify and sow in the spring. Seeds should be sown at a shallow depth. These seedlings will germinate the first year and flower the second. Propagation by division is accomplished by digging the plants in
Seed Treatment: Moist stratification.
Commercially Avail: yes

From the National Organizations Directory

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

Mt. Cuba Center - Hockessin, DE

Web Reference

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

Additional resources

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


Record Modified: 2023-02-14
Research By: TWC Staff

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