The flowers of Nemesia denticulata grow in small, flattish, raceme-shaped clusters at stem-tips or solitary. Some narrow, green and thread-like sepals are visible in the photo around a still furled corolla bud.
Flowering may happen at any time of year, more in summer (Euston-Brown and Kruger, 2023; Manning, 2009; Pooley, 1998; iNaturalist).