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

Marah oregana (Torr. ex S. Watson) Howell
manroot
Cucurbitaceae (Cucumber family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #9434)

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Distribution of Marah oregana
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Species Information

General:
Climbing perennial from an enlarged woody root; annual stems climbing or trailing with branched tendrils.
Leaves:
Stem leaves alternate, irregularly palmately lobed, stalked, bristly above, sparsely hairy below, heart-shaped at the base, about 20 cm long.
Flowers:
Inflorescence of bell-shaped flowers in a panicle; perianths bell-shaped, whitish, with 5 to 8 petals/sepals; male flowers in narrow-stalked clusters from the leaf axils; single female flowers short-stalked from the same axils as the male flowers; corolla lobes flaring, oblong egg-shaped.
Fruits:
Inflated, weakly spiny bladders, ellipsoid to oblong egg-shaped; seeds 1 or 2 in each locule, turgid, smooth.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist fields and open meadows and slopes in the lowland zone; rare in SW BC, known only from Vancouver Island and the Gulf Islands; S to N CA.

Source: The Illustrated Flora of British Columbia

Synonyms and Alternate Names

Marah oreganus (Torr. ex A. Gray) Howell

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

Species References

COSEWIC. 2009. COSEWIC assessment and status report on the Coast Manroot Marah oreganus in Canada. Committee on the Status of Endangered Wildlife in Canada. Ottawa. vi + 28 pp. Available online.

General References