S. bullata (top) and S. conspicua have flowers typical of two branches of the Dircaea group.

This group includes most of the familiar species: S. cardinalis, S. leucotricha, S. eumorpha, and the newer favorite S. bullata, along with about 15 more.

Most of the species have red tubular flowers and are pollinated by hummingbirds.  A subgroup has large red flowers with an overhanging upper lip (called a galea). and includes S. cardinalis and S. hatschbachii.

Another group includes  S. eumorpha and S. conspicua and have bee-pollinated, campanulate flowers, with a diversity of colors ranging from lavender to white in S. eumorpha to pale yellow in S. conspicua.

The species in this group have been used extensively in hybridizing and so far, they all cross with one another to form fertile hybrids. They have also been crossed with the micro-miniature species in the Corytholoma group to produce the modern “miniature” hybrids.

All the species in this group form tubers. They all have the genus name Sinningia.