E-Flora BC: Electronic Atlas of the Flora of British Columbia

Orobanche corymbosa (Rydb.) Ferris
flat-topped broomrape (flat-top broomrape)
Orobanchaceae (Broom-rape family)

Introduction to Vascular Plants

© Curtis Bjork  Email the photographer   (Photo ID #15772)

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Distribution of Orobanche corymbosa
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Orobanche corymbosa ssp. mutabilis

Species Information

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Parasitic herb from a coarse, tuber-like, fleshy root; stems branched, clustered, thickened at the base, short glandular-hairy, pale purple, 3-16 cm tall.
Basal leaves lacking; stem leaves scaly-bracteate, alternate, short glandular-hairy.
Inflorescence of few flowers in round-topped clusters; corollas purple, 2-3 cm long, the lips 4-9 mm long, stalked, the stalks 0.5-3 cm long, with leaves; calyces 12-18 mm long, the lobes longer than the tubes, erect to spreading; anthers woolly-hairy.
Capsules; seeds numerous, angled, net-veined, less than 0.7 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Parasitic, mainly on Artemisia in dry shrublands in the steppe and montane zones; rare in SC BC; S to MT, WY, UT and NE CA.

Source: The Illustrated Flora of British Columbia


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

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General References