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Youngia japonica (L.) DC.

Common Name(s):
Asiatic, Hawksbeard, Oriental hawksbeard
Categories:
Annuals, Herbs
Comment:

Hawksbeard, in the Asteraceae (daisy) family, is a summer annual herb, often persisting year round. Seedlings form a rosette resembling a small sowthistle (Sonchus spp.) but leaves are hairy. Upper leaves are more linear and lack a stalk, and a milky sap is emitted when leaves are torn. In contrast to dandelion, narrowleaf hawksbeard plants have leaves on the flowering stem, and plants can become highly branched. In the rosette stage (i.e., before the flowering stem has bolted upward), it is much trickier to differentiate between narrowleaf hawksbeard and dandelion.

Inflorescence stalk is generally leafless (but occasionally with up to 3 leaves), branched at the top, and 6 to 15 inches (occasionally to 3 feet) tall. Flowers are yellow, dandelion-like but only about 1/2 inch in diameter. Seedheads are dandelion-like, about 1/4 to 1/2 inches in diameter, and seeds are wind dispersed. Do not let plants go to seed. Hawksbeard appears to be well controlled by available preemergence herbicides; however, herbicide efficacy rankings for this species are based on limited experimental data.

Season:
summer annual weed
Height:
6 inches to 3 feet
Tags:
weed

NCCES plant id: 3061

Youngia japonica (L.) DC. Habit
Youngia japonica (L.) DC. Seedling
Youngia japonica (L.) DC. Stem
Youngia japonica (L.) DC. Leaf
Youngia japonica (L.) DC. Inflorescence
Youngia japonica (L.) DC. Flower