Page author: David Giblin
Nuttallanthus texanus
blue toadflax, Texas toadflax

Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California, east to Sasketchewan and across much of the U.S. except the upper Midwest and Northeast.

Habitat: Prairies, grasslands, and balds.

Flowers: May-June

Origin: Native

Conservation Status: Threatened in Washington (WANHP)


Slender, glabrous annual or winter annual from a short taproot, the stems 1-5 dm. tall, with a whorl of prostrate stems at the base, these with opposite or ternate leaves; main stems 1-several from the base, simple and erect.


Main stems leaves mostly alternate, sessile, sparse, linear, 1-3.5 cm. long and 1-2.5 mm. wide, the lower often opposite.


Flowers in nearly naked, terminal racemes; calyx of 5 distinct sepals; corolla light blue, bilabiate, 10-12 mm. long exclusive of the slender, downward-curved spur 5-9 mm. long, the lower lip 3-lobed, much larger than the erect, 2-lobed upper lip; stamens 4.


Capsules ellipsoid, 2.5-4 mm. long; seeds densely tuberculate.

Accepted Name:
Nuttallanthus texanus (Scheele) D.A. Sutton
Publication: Revis. Antirrhineae 460. 1988.

Synonyms & Misapplications:
Linaria canadensis (L.) Dum. Cours. var. texana (Scheele) Pennell [HC]
Linaria texana Scheele
Additional Resources:

PNW Herbaria: Specimen records of Nuttallanthus texanus in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Nuttallanthus texanus checklist entry.

E-Flora BC: Nuttallanthus texanus atlas page.

CalPhotos: Nuttallanthus texanus photos.

USDA Plants: Nuttallanthus texanus information.

16 photographs:
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