Hypochaeris radicata (sometimes spelled Hypochoeris radicata), also known as catsear, flatweed, cat's-ear, hairy cat's ear or false dandelion, is a perennial, low-lying edible herb often found in lawns. The plant is native to Europe, but has also been introduced to the Americas, Japan, Australia and New Zealand where it can be an invasive weed. It is listed as a noxious weed in Washington State, in the northwestern United States.
Botany
The leaves, which may grow up to eight inches (20 cm) tall, are lobed and covered in fine hairs, forming a low-lying rosette around a central taproot. Forked stems carry bright yellow flower heads, and when mature these form seeds attached to windborne "parachutes". All parts of the plant exude a milky sap when cut.
Hypochaeris species are used as food plants by the larvae of some Lepidoptera species including the shark moth.
Etymology and differences from dandelions
Its name is derived from Greek ὑπό (under) and χοῖρος (young pig). Thus the name should be spelled Hypochoeris.
The adjective radicata means with conspicuous roots in Latin (derived from radix, root).
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