Nemesia denticulata flowers

The two-lipped Nemesia denticulata flower may be pink or mauve, while one common name of the plant is blue nemesia.

The upper lip has four oblong lobes ending in rounded tips, resembling short, fat fingers. There are dark, purplish, vertical lines upwards from the base of the upper lip. The lower lip has bright yellow or orange crests, markings at its base on a pair of small, oblong mounds. The lip margin is irregularly curved to roundly bilobed and sometimes wavy. The almost cylindrical spur at the back of the corolla tapers slightly towards its tip, becoming up to 3 mm long. 

The flowers are about 15 mm wide (Euston-Brown and Kruger, 2023; Manning, 2009; Pooley, 1998; iNaturalist).