Types are based on several physical traits, i.e. crenate or dentated phylloclades & symmetrical or asymmetrical flowers. Other traits are pollen color, color of the stigmatic tube and ridging or smoothness of the ovary & fruit.
B – Buckleyi Type, which can be an interspecific hybrid of S. russelliana and S. truncata. It can also be any cultivar showing crenate phylloclades and symmetrical to near symmetrical flowers similar to S. russelliana and three to four ridged ovaries and fruit.
BT – Mainly Buckleyi traits or russelliana traits. The BT type have slightly asymmetrical to very zygomorphic flower form with pinkish or greyish pollen color (as opposed to yellow with the B type). Ovary and fruit generally have 3–4 significant ridges similar to S. russelliana or S. × buckleyi.
EP – S. × eprica, which is S. russelliana × S. orssichiana. The term S. × eprica was named after the E.P.R.I.C. Foundation.
N – Hybrids and cultivars which doesn’t fit to one of the other types.
O – Exotica or S. × exotica are an interspecies cross of Schlumbergera opuntioides × Schlumbergera truncata or S. × buckleyi. The segmented sections are not flat phylloclades but are 3-dimensional having 3–4 sides.
Q – Queens or S. × reginae are an interspecies cross of
S. orssichiana × Truncata type cultivar or species. Queens have larger, longer phylloclades with significantly long dentation. Flowers are larger than a S. truncata type with a short, slightly curved flower tube. Some can have more than one blooming season.
T – Schlumbergera species exhibiting marginal and apex dentations on their phylloclades, upright growth habit, and asymmetrical flower form. The majority of hybrids exhibit these traits.
TB – More Truncata characteristics such as dentated, asymmetrical flower form, yellow pollen and fruit with faint ridges or smooth.