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Stenaria nigricans var. nigricans (Diamondflowers)
Marcus, Joseph A.

Stenaria nigricans var. nigricans

Stenaria nigricans (Lam.) Terrell var. nigricans

Diamondflowers, Narrowleaf Bluets, Baby's Breath, Bluets, Fine-leaf Bluets

Rubiaceae (Madder Family)

Synonym(s): Chamisme angustifolia, Gentiana nigricans, Hedyotis nigricans, Hedyotis nigricans var. austrotexana, Hedyotis nigricans var. filifolia, Hedyotis nigricans var. nigricans, Hedyotis nigricans var. papillacea, Hedyotis nigricans var. pulvinata, Hedyotis nigricans var. rigidiuscula, Hedyotis nigricans var. scabra, Hedyotis salina, Houstonia angustifolia, Houstonia angustifolia var. filifolia, Houstonia angustifolia var. rigidiuscula, Houstonia filifolia, Houstonia nigricans, Houstonia nigricans var. pulvinata, Houstonia pulvinata, Houstonia rigidiuscula, Houstonia salina, Houstonia tenuis, Oldenlandia angustifolia, Oldenlandia angustifolia var. filifolia


USDA Native Status: L48 (N)

Delicate and slender-stemmed, this perennial can be upright or sprawling, and 2-20 in. high. Diamondflowers or Bluet stems form clumps and become branched in the upper portion. Its small but abundant flowers are pink or white, trumpet-shaped, four-lobed, and in clusters at the ends of stiff branches. Leaves are very narrow and thread-like with rolled margins.

Nigricans so named because the leaves turn black when dry.


From the Image Gallery

67 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Complexity: Simple
Fruit Type: Capsule
Size Notes: Up to about 20 inches tall.

Bloom Information

Bloom Color: White , Pink
Bloom Time: Apr , May , Jun , Jul , Aug , Sep , Oct , Nov


USA: AL , AR , CO , FL , GA , IA , IL , IN , KS , KY , LA , MI , MO , MS , NE , NH , NM , OH , OK , SC , TN , TX , VA
Native Distribution: FL to c. AZ & adjacent Mex., n. to GA, OH, IN, s.w. IL & IA
Native Habitat: Dry, rocky prairies & hillsides; rocky, open woods; roadsides

Growing Conditions

Light Requirement: Sun
Soil Description: Sandy or calcareous soils.

From the National Organizations Directory

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

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

Herbarium Specimen(s)

NPSOT 0524 Collected Jul 27, 1987 in Bexar County by Harry Cliffe
NPSOT 0414 Collected May 28, 1987 in Bexar County by Harry Cliffe
NPSOT 0110 Collected May 30, 1991 in Bexar County by Lottie Millsaps
NPSOT 0396 Collected May 30, 1993 in Comal County by Mary Beth White
NPSOT 0251 Collected July 7, 1992 in Kendall County by Kristina Coates

5 specimen(s) available in the Digital Herbarium


Bibref 946 - Gardening with Prairie Plants: How to Create Beautiful Native Landscapes (2002) Wasowski, Sally
Bibref 248 - Texas Wildflowers: A Field Guide (1984) Loughmiller, C. & L. Loughmiller
Bibref 328 - Wildflowers of Texas (2003) Ajilvsgi, Geyata.
Bibref 286 - Wildflowers of the Texas Hill Country (1989) Enquist, M.

Search More Titles in Bibliography

Web Reference

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

Additional resources

USDA: Find Stenaria nigricans var. nigricans in USDA Plants
FNA: Find Stenaria nigricans var. nigricans in the Flora of North America (if available)
Google: Search Google for Stenaria nigricans var. nigricans


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

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