Easily confused with : Cat's-ear (Hypochaeris radicata); read captions for differences. More similarities to : Lesser Hawkbit (Leontodon saxatilis) which also has wide bracts around the flower, but that also has a few much shorter and much narrower bracts on top of those wide bracts.

Hybridizes with : Cat's-ear (Hypochaeris radicata) to produce Hypochaeris x intermedia which is intermediate between the two regarding the flower-head, but which opens in both sunny or dull weather. It is less than 5% fertile and occurs in Merioneth and Fife, possibly other places too where it might be over-looked.

No relation to : Catmint, Catnip, Lamb's-Ear, Sticky Mouse-Ear, Common Mouse-Ear, Little Mouse-Ear, Sea Mouse Ear or Sickle Hare's-ear nor to the numerous Cat's-tail grasses. [plants with similar names].

It is listed as a rare [R] and vulnerable to extinction, but is less rare than is Spotted Cat's-ear (Hypochaeris maculata).

The far rarer Spotted Cat's-ear (Hypochaeris maculata) is a rare [RRR] and has leaves which are usually either spotted or streaked with purple with the outer phyllaries usually uniformly hairy.

All cat's-ears have two types of parachuted seeds; those on the outside of the seed-clock are simple haired (without the hairs being feathered and with the parachute attached directly to the seed) whereas those on the inside are are compound hairs with each hair being feathered and the seed attached to the pappus by a long stalk).

It grows on sparse grassland or bare ground, on poor acidic sandy soils and on dunes.