Hemerocallis lilioasphodelus is a plant of the genus Hemerocallis. It is one of the first daylilies used for breeding new daylily cultivars. Hemerocallis lilioasphodelus grows in big, spreading clumps, and its leaves grow to 75 cm long.
Hemerocallis lilioasphodelus is commonly called lemon daylily or lemon lily and features 4" diameter, trumpet-shaped, lemon yellow flowers. Individual flowers open up for 1-2 days. This species daylily has flower scapes rising up to 3' tall from a clump of arching, strap-shaped, medium green leaves. Valued for early bloom period (May-June) and very fragrant flowers. Also known as H. flava. Genus name comes from the Greek words hemera meaning day and kallos meaning beauty as each flower lasts but one day. Specific epithet is a combination of lili meaning lily and the genus name Asphodelus.