Oxalis corniculata

creeping wood sorrel
Introduced
Flowers: yellow flowersJanuary-December

Petals less than 8mm. Stem rooting at nodes. Often red at base of petals.

Photos

(c) highlyconcerned (CC BY-NC)
By 葉子 (CC0)
(c) Even Dankowicz (CC BY)
(c) Franz Anthony (CC BY-NC)