Garden Helleborine
Epipactis helleborine
Washington State Classification
Monitor List
This plant is on the monitor list - it is not a listed noxious weed in Washington.
Quick Reference
Identification
Growth Habit
Garden helleborine is a perennial herbaceous plant that typically grows about 9.8 to 31.5 inches (25 to 80 cm) tall. Plants are sparsely to densely hairy. Flowers light pinkish-greenish color in somewhat one-sided inflorescence, blooming summer to early fall, then forming capsules with tiny seeds.
Leaves
Leaves clasping stem, alternate arrangement, elliptic (oval to narrow oval) to lance shape in outline, 1.5 to 7 inches long by 0.6 to 3.3 inches wide (4 to 18 cm long by 1.5 to 8.5 cm wide).
Flowers
Inflorescence of many flowers, somewhat one-sided in arrangement. Each flower has three light greenish sepals and three petals. The top two petals egg-shaped in outline (ovate), 0.4 inches long (9 to 11 mm), and varying in color from light greenish, pinkish, purple or yellowish. The third (lower) petal with a different shape, called a labellum or lip, the base concave and purple to brownish and then towards the tip it is recurved, pinkish, triangular to egg-shaped, and flat. Under (subtending) each flower is a small lance-shaped to linear, leaf-like bract that is longer than the flower.
Fruit & Seeds
Capsule, egg-shaped, attached at the narrower end, 0.4 to 0.6 inches (9 to 14 mm) long, fairly hairless to hairy.
Impact
This plant is on the monitor list - it is not a listed noxious weed in Washington. Please contact the noxious weed control board via noxiousweeds@agr.wa.gov to report locations or for more information.
Ecology & Spread
Habitat
So far Epipactis helleborine has been found in western WA, in forested areas to open disturbed locations like roadsides as well as in ornamental plantings. Herbarium records can be viewed on the UW Herbarium website here.
Spread Mechanisms
Reproduction
By seeds and by roots.
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