noun
creeping lettuce; Ixeris stolonifera
A low-growing perennial plant in the aster family, native to East Asia. The name is a botanical term; in everyday contexts, it may be referred to simply as a type of wild lettuce.
See also: 地縛
イワニガナは道端や草地で見られる小さな黄色い花をつける植物です。
Creeping lettuce is a plant with small yellow flowers found on roadsides and in grassy areas.
地縛 is a different plant (possibly a type of bindweed or similar) and is not a synonym; the cross-reference may indicate a related species or a misreading.
The name イワニガナ literally means 'rock bitter herb', from 岩 (iwa, 'rock'), 苦 (ni, 'bitter'), and 菜 (na, 'greens/herb'). The derivation is straightforward from its habitat and taste, but the exact historical coinage is uncertain.