Rough chervil
Chaerophyllum temulum
Washington State Classification
Class B — Control Required (Designated)
Rough chervil creates monocultures in forest areas, disrupting the ecosystem and native speices.
Required control in Region 1 (all western Washington counties)
Quick Reference
Identification
Growth Habit
Rough chervil is a biennial, herbaceous plant, covered in rough hairs, grows up to ~ 3.3 feet (1 meter) tall and has clusters of white flowers.
Leaves
Basal leaves are 2-3 times pinnately compound and hairy on both sides. Leaf segments obtuse or abruptly contract to pointed tip. The compound leaves reduce in size up the stem and are alternately arranged.
Flowers
Flowers in compound, somewhat open, umbels of small white flowers, petals 1-3 mm.
Fruit & Seeds
Fruits 4 to 6.5 mm long that gradually taper from the middle to their tip. 4 to 6.5 mm (0.16 to 0.26 inches) long
Impact
Rough chervil creates monocultures in forest areas, disrupting the ecosystem and native speices.
Ecology & Spread
Habitat
Grows in disturbed understories and semi-shaded areas. In areas with moist soils part of the year. Click here to see a county-level distribution of rough chervil in Washington.
Spread Mechanisms
Reproduction
Plant spread readily by seed.
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