Lobelia purpurascens, commonly known as white root[2] or purplish pratia,[3] is a flowering plant in the family Campanulaceae of eastern Australia.

It is a small herbaceous, scrambling plant with white to pale pink flowers.

The single flowers are borne in leaf axils on a pedicel 1–7 cm (0.39–2.76 in) long, corolla pale mauve-pink, bluish or white, 8–10 mm (0.31–0.39 in) long, lower petals oblong-rounded, upper petals upright, tapering to a point, curved inward and smaller than upper petals.

[2][3][4] Lobelia purpurascens was first formally described in 1810 by Robert Brown and the description was published in Prodromus florae Novae Hollandiae et insulae Van-Diemen, exhibens characteres plantarum quas annis 1802-1805.

[7] White root grows mostly in shady, moist situations in woodland and grasslands in New South Wales, Queensland and Victoria.