Passiflora nitida, the bell apple, is a tasty, but relatively unknown passion fruit. It is similar to P. laurifolia, with orange-yellow fruits that have a sweet, succulent pulp. It is a fast-growing tropical vine. Its flowers are blue and red, a bit like P. laurifolia and P. quadrangularis. The fruits grow up to 4 centimetres (1.6 in). The exact hardiness in unknown, but it is tropical and should be protected from prolonged temperatures below 50–55 °F (10–13 °C). It is not frost hardy. Passiflora ...