Bigroot, Coastal Manroot, Manroot, Old Man-in-the-ground, Oregon Bigroot, Wild Cucumber
Marah oregana
Synonyms: Echinocystis oregana, Marah oreganus
The photo at right shows the
tendrils of the wild cucumber which help it climb objects.
Characteristics:
Wild Cucumber is also called bigroot, manroot, and old-man-in-the-ground.
It is a somewhat weedy, viny perennial that arises each year from a massive
taprot. The stem is long and thick, with other long viny branches arising from
the main stem.
The leaves are stalked and roughly heart-shaped, often reaching
more than six inches in length and width. Numerous straight to spiralled tendrils
loop off of the stem to wrap around other plants or objects to support the plant
(See photo at right.). This is how the plant supports itself off of the ground,
so the plant may be trailing or climbing.
The flowers are waxy-white and and star-shaped (5 petals).
Individual flowers are single-sexed. The inflorescence is a loose raceme (See
photos at top). The fruit are gourd-like, ovate, fleshy at first, with prickly
spines (see photo below). The fruits and seeds are poisonous.
Habitat:
The wild cucumber is found in fields, bottom lands, open hillsides,
and along roadsides.
Range:
The wild cucumber is found from southern British Columbia south
through Washington and Oregon to northern California, and is found mostly west
of the Cascade Crest. It may extend further east along the Columbia and Snake
Rivers as far as the Oregon and Idaho border in the Snake River Gorge.
In the Columbia River Gorge, the wild cucumber may be found
between the elevations of 100'-3000' from Troutdale, OR east to Horsethief Butte.
The photo above shows the inferior ovary of the female flower
of the wild cucumber as seen in the Columbia Hills to the north of The Dalles,
OR.............May 14, 2006.
Spiny, ovate fruits of the wild cucumber from The Dalles Mt.
Road, north of The Dalles, OR.............May 14, 2006.
The photo above shows another view of the tendrils of wild cucumber
which are used (sometimes on itself) to help the plant clamber upwards over
other plants.
Spiny fruits of Oregon manroot as seen on disturbed soils at Horsethief Butte in the eastern Columbia River Gorge...........May 10, 2009.
Oregon manroot beginning to bloom in upper Eightmile Creek in the Columbia Hills Natural Area Preserve..........April 12, 2014.
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Oregon manroot blooming along the Lyle-Cherry Orchard Trail, Columbia River Gorge.........April 2, 2015.
Oregon manroot beginning to bloom at about 1000' elevation along the western loop of the Dog Mountain Trail in the Columbia River Gorge...........May 4, 2011.
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Newly blooming Oregon manroot as seen on grassy slopes along the Lyle-Cherry Orchard Trail about one-half mile east of Lyle, WA.........March 3, 2015.
Newly blooming Oregon manroot as seen on grassy slopes along the Lyle-Cherry Orchard Trail about one-half mile east of Lyle, WA.........March 16, 2017.
Paul Slichter