Page authors: Don Knoke, David Giblin
Turritis glabra
tower mustard

Distribution: Widely distributed throughout Washington; British Columbia to northern California, east to the Rocky Mountains.

Habitat: Seasonally moist, sometimes rocky, soil in open woods, clearings, and grassy balds.

Flowers: May-July

Origin: Native

Conservation Status: Not of concern


Biennial or short-lived perennial from a simple crown, the stem usually single, simple or branched above, 3-15 dm. tall, pubescent with stiff, simple hairs at the base, becoming glabrous above.


Leaves mainly cauline, the basal ones oblanceolate, 3-14 cm. long, usually remotely toothed, the blade narrowed to a short, winged, greenish petiole, pubescent with a mixture of simple and stellate hairs; cauline leaves alternate, overlapping, lanceolate to ovate-lanceolate, 5-15 cm. long and up to 4 cm. broad, sessile and conspicuously auriculate.


Inflorescence a many-flowered raceme, up to 6 dm. long in fruit; pedicles slender, 5-12 mm. long; sepals 4, 3 mm. long, not gibbous at the base; petals 4, cream colored, 5-6 mm. long; stamens 6; style 1-1.5 mm. long.


Siliques glabrous, 6-10 cm. long and 1-1.5 mm. broad, 1-nerved nearly full length; seeds in 2 series, 1-1.5 mm. long with a winged margin 0.2 mm. broad.

Accepted Name:
Turritis glabra L.
Publication: Sp. Pl. 2: 666. 1753.

Synonyms & Misapplications:
Arabis glabra (L.) Bernh. [HC]
Arabis glabra (L.) Bernh. var. furcatipilis M. Hopkins
Arabis glabra (L.) Bernh. var. glabra [ILBC2]
Additional Resources:

PNW Herbaria: Specimen records of Turritis glabra in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Turritis glabra checklist entry.

E-Flora BC: Turritis glabra atlas page.

CalPhotos: Turritis glabra photos.

USDA Plants: Turritis glabra information.

37 photographs:
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