Hypochaeris radicata
naturalizedAsteraceae

Hypochaeris radicata

Common Cat's-ear

Naturalized (non-native)non-native

Introduced and now reproducing on its own in the wild.

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.

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Seasonality
25 flowering · 0 fruiting annotations · iNaturalist · fetched Jul 2026
JFMAMJJASONDpeak
flowering (peak July) fruiting (peak January)

This is an inference, not a schedule. The curve reflects when observers annotated flowering and fruiting — which tracks observer effort as well as plant behavior, and pools all elevations and islands into one signal. Hawaiʻi’s microclimates vary enormously; a species may fruit in January at sea level and June at elevation. Use this to know when to look, then look.

Gallery · 11 · iNaturalist
open-licensed photos · click any to view its source
Where documented · 43 ahupuaʻa
documented occurrences · iNaturalist + GBIF · iNaturalist 200 · GBIF 297 records
Keauhou · HawaiʻiiNat 78 · GBIF 96
Kalialinui · MauiiNat 20 · GBIF 43
Waiākea · HawaiʻiiNat 27 · GBIF 29
Waimea · KauaʻiiNat 27 · GBIF 23
Humuʻula · HawaiʻiiNat 12 · GBIF 26
Kaʻohe Mauka · HawaiʻiiNat 3 · GBIF 12
Piʻihonua · HawaiʻiiNat 5 · GBIF 10
Pūlehunui · MauiiNat 4 · GBIF 8
Waiheʻe · MauiiNat 2 · GBIF 3
Pāpaʻikou · HawaiʻiiNat 3 · GBIF 2
ʻŌlaʻa · HawaiʻiiNat 1 · GBIF 4
Kalalau · KauaʻiiNat 4 · GBIF 1
Papaʻanui · MauiiNat 1 · GBIF 3
Keaʻau · HawaiʻiiNat 1 · GBIF 3
Kahuku · HawaiʻiiNat 1 · GBIF 3
Kapāpala · HawaiʻiiNat 2 · GBIF 1
Kalawao · MolokaʻiiNat 1 · GBIF 1
Nuʻu · MauiiNat 1 · GBIF 1
Kahikinui · MauiiNat 1 · GBIF 1
ʻAlae 1-2 · MauiiNat 1 · GBIF 1
Hakalau · HawaiʻiiNat 1 · GBIF 1
Honopū · KauaʻiiNat 1 · GBIF 1