Streptocarpus capuronii occurs in northern Madagascar over a much larger area than where it was originally specified to occur by Hilliard and Burtt (1971). The species possesses a very distinctive character, a particularly long leaf stem (hypocotyl) which can easily be over 70 mm long. Its leaf is that of a typical unifoliate being ovate in shape (50-150 x 10-120 mm) and light green, and covered above and below with soft hairs.
Each leaf can carry up to three inflorescences with 10-15 flowers open simultaneously. The corolla is 8-9 mm long, white, with lobes tinged lilac, tube 5 mm, violet speckles or thin lines on the inside floor of the tube not extending into the lobes. Upper lobes 1.5 x 1.5 mm, lower lobes 2.5 x 2 mm, with the style protruding outside the lobes. It has been placed into the unclassified group because it has not been included in phylogenetic analyses and its unique hypocotyl makes it difficult to place it in a section, although it is likely to be a member of Section Plantaginei.
As can be seen from the pictures this species makes a very pretty and dainty display in nature where small groups of plants grow in rock cracks, even on vertical rock walls. It is in cultivation and deserves to be grown more frequently, even though it is unifoliate, and possibly annual.
