Aphyllon fasciculatum
clustered broomrape

Distribution: Occurring east of the Cascades crest in Washington; Alaska to California, east to the Great Plains and the Great Lakes region.

Habitat: Dry, open places, valleys to montane, parasitic exclusively on Artemisia.

Flowers: May-July

Origin: Native

Growth Duration: Annual

Conservation Status: Not of concern


Herbaceous, non-green holoparasite attaching to the roots of its host.


Vestigial and scale-like.


2-valved capsule; style persistent. Produces numerous dark seeds 0.2-0.5 mm.

Accepted Name:
Aphyllon fasciculatum (Nutt.) Torr. & A. Gray
Publication: Manual (Gray), ed. 2. 281. 1856.

Synonyms & Misapplications:
Anoplanthus fasciculatus (Nutt.) Walp.
Orobanche fasciculata Nutt. [HC, JPM]
Orobanche fasciculata Nutt. var. fasciculata [VPBC2]
Orobanche fasciculata Nutt. var. lutea (Parry) Achey [JPM]
Orobanche fasciculata Nutt. var. subulata Goodman
Orobanche fasciculata Nutt. var. typica Achey
Thalesia fasciculata (Nutt.) Britton
Thalesia lutea (Parry) Rydb.
Additional Resources:

PNW Herbaria: Specimen records of Aphyllon fasciculatum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Aphyllon fasciculatum checklist entry.

E-Flora BC: Aphyllon fasciculatum atlas page.

CalPhotos: Aphyllon fasciculatum photos.

USDA Plants: Aphyllon fasciculatum information.

3 photographs:
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