Tripterocalyx micranthus
Small-Flowered Sand Verbena, Great Sand Dunes.jpg
In Great Sand Dunes National Park
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Nyctaginaceae
Genus: Tripterocalyx
T. micranthus
Binomial name
Tripterocalyx micranthus

Abronia micranthus

Tripterocalyx micranthus is a species of flowering plant in the four o'clock family known by the common names smallflower sandverbena[1] and small-flowered sand-verbena.

It is native to North America, where it is known from southern Alberta and Saskatchewan through a section of the central United States toward the desert southwest in California, Arizona, and New Mexico. It can be found in several types of habitat, including sandy and scrubby desert regions and sagebrush.


Tripterocalyx micranthus is erect and branched but generally compact, its hairy, glandular stem reaching a maximum length near 60 centimeters. The stem is red in color and sticky in texture.

Each leaf has a fleshy, hairy green blade up to 6 centimeters long which is borne on a long petiole.

The inflorescence is a head of several elongated flowers borne on long, glandular pedicels all attached at the small central receptacle. Each trumpet-shaped pink or green-tinged flower may be up to 1.8 centimeters in length and up to half a centimeter wide at the face of the corolla, with 4 or 5 lobes.

The fruit has wide, thin, net-veined or ribbed wings extending from a central body. It is an annual herb and its native habitats include prairies, meadows, and fields.[2]


  1. ^ "Tripterocalyx micranthsu". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 15 December 2015.
  2. ^ "Lady Bird Johnson Wildflower Center - The University of Texas at Austin". Retrieved 2021-11-11.

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