Contains 7 accepted taxa overall.

Characteristics
Kalanchoe Adans.
WIDOW'S THRILL
Various data indicate it is appropriate to consider Bryophyllum as a synonym of Kalanchoe (Gehrig et al. 2001; Mort et al. 2001; Kuligowska et al. 2015; Hartwell et al. 2016).
Classification
SAXIFRAGALES
Kalanchoe
Citation
KALANCHOE Adanson, Fam. Pl. 2: 248. 1763.
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TYPE: Kalanchoe laciniata (Linnaeus) de Candolle (Cotyledon laciniata Linnaeus)
Species
Scientific Name Common Name Herbarium Specimens Status Photos
Kalanchoe blossfeldiana MADAGASCAR WIDOW'S-THRILL; CHRISTMAS KALANCHOE Not Native
Kalanchoe crenata NEVERDIE Not Native
Kalanchoe daigremontiana DEVIL'S BACKBONE Not Native
Kalanchoe delagoensis CHANDELIER PLANT Not Native
Kalanchoe fedtschenkoi LAVENDER SCALLOPS Not Native
Kalanchoe pinnata CATHEDRAL BELLS; LIFE PLANT Not Native FACU (NWPL) Y
Kalanchoe x houghtonii MOTHER-OF-MILLIONS Not Native Y
[Family identification key]
1.  Leaf blade ovate to obovate, mostly <1.7 times longer than wide
2
1.  Leaf blade or leaflets subterete, lanceolate, to elliptic, mostly >1.7 times times longer than wide
3
2.  Leaves green, yellowish, whitish, to reddish green; flowers erect
2.  Leaves gray-green to bluish green; flowers pendent
3.  Flowers erect
3.  Flowers pendent
4
4.  Leaves simple or compound, scarcely paler below; calyx 2.5-5 cm long, lobed only at the tip; corolla lobed only at the tip and reddish only at the tip
4.  Leaves simple, paler below and often dark-mottled; calyx 0.6-1.6 cm long, deeply lobed; corolla deeply lobed and reddish throughout except for the nectar chamber
5
5.  Leaf blade subterete, toothed only near the tip
5.  Leaf blade flattened, toothed along most of the margin
6
6.  Larger leaf blades >3 cm wide, triangular to lanceolate, with teeth at the base of the blade below the widest point, the blade base auriculate, cordate, to truncate (broadly cuneate in immature plants)
6.  Leaf blades <3 cm wide, narrowly lanceolate, usually without teeth at the base of the blade below the widest point, the blade base cuneate to subtruncate
Genus Synonyms
Synonym Full Citation Basionym Type
Bryophyllum Bryophyllum Salisbury, Parad. Lond. t. 3. 1805. TYPE: Bryophyllum calycinum Salisbury 1805.
Kitchingia Kitchingia Baker, J. Linn. Soc., Bot. 18: 268, pl. 7. 1881. TYPE: Non desigatus.
Physocalycium Physocalycium Vest, Flora 3: 409. 1820. TYPE: Non designatus.
Vereia Vereia Andrews, Bot. Repos. 1: t. 21. 1798. TYPE: Vereia crenata Andrews 1798.