Page author: David Giblin
Verbascum thapsus
flannel mullein, great mullein

Distribution: Distributed widely throughout Washington; widely distributed throughout North America.

Habitat: Common on open, disturbed ground, roadsides and logged areas in the mountains.

Flowers: June-September

Origin: Introduced from Eurasia

Growth Duration: Biennial

Conservation Status: Not of concern


Coarse, taprooted biennial, producing a rosette of basal leaves the first year, and a single, erect stem 0.4-2 m. tall the second year, the entire plant covered with white-woolly, branched hairs.


Basal leaves broadly oblanceolate, 1-4 dm. long and 4-12 cm. wide, tapered to a long petiole, nearly entire; cauline leaves alternate, numerous, reduced upward, becoming sessile and clasping.


Inflorescence a dense, elongate spike; calyx of 5 sepals; corolla usually yellow, slightly irregular, 5 lobed, 1-2 cm. wide; stamens 5, all fertile, the upper 3 filaments densely yellow-hairy, the lower 2 glabrous and longer.


Capsule broadly ovoid, 7-10 mm. long.

Accepted Name:
Verbascum thapsus L.
Publication: Sp. Pl. 1: 177. 1753.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Verbascum thapsus in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Verbascum thapsus checklist entry.

E-Flora BC: Verbascum thapsus atlas page.

CalPhotos: Verbascum thapsus photos.

USDA Plants: Verbascum thapsus information.

42 photographs:
Group by