The Cardinal Flower is closely related to Sinningia, and the treatment required is very similar. The shape of the flowers, however, is completely different - Rechsteineria cardinalis bears tubular blooms quite unlike the open bells of Gloxinia. The bright red flowers appear in summer. The hooded, bright red blooms of Rechsteineria cardinalis (Sinningia cardinalis) are borne horizontally at the top of the 1 ft stems. Rechsteineria leucotricha has woolly silvery-grey leaves and pink flowers.