Bryophyllum × houghtonii (D.B.Ward) P.I.Forst.
Mother of Millions
Sterile hybrid between Kalanchoe daigremontiana (= B. daigremontianum) and K. delagoensis (= B. delagoense), now recognised as Kalanchoe × houghtonii. Its leaves are intermediate between the two parent species: flattened but with greyish tone and purple spots, with propagules on margins and apex. It is one of the most widely distributed Bryophyllum hybrids and one of the most invasive in subtropical and Mediterranean climates.
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© H. Zell (Llez) / Wikimedia Commons
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Overview
| Category | Classification |
|---|---|
| Family | Crassulaceae |
| Genus | Bryophyllum |
| Growth Habit | Erect succulent herb, morphology intermediate between the two parents |
| Conservation Status | Not Evaluated (NE) — declared invasive hybrid in several countries |
| pH Target | 6.0–7.5 |
| Type | Sandy-loam, very well-drained |
Origin & Habitat
Requirements
Soil & Substrate
Type
Sandy-loam, very well-drained
groups Beneficial Associations
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Propagation Strategy
G
O
Every 2 years
Highly diluted cactus fertilizer, monthly in spring-summer
Uses & Applications
Precautions / Toxicity
Toxic to domestic animals and livestock; bufadienolide glycosides inherited from both parent species.
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Plant Health
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"Accepted name: Kalanchoe × houghtonii D.B.Ward. Being sterile, it propagates exclusively by vegetative propagules, facilitating mass naturalisation. Declared invasive in the Canary Islands, Madeira, Australia, South Africa and Pacific islands."
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Scientific Integrity
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Sources
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Discussion
Disclaimer
This species record is provided for educational and informational purposes only. Jardín Roca Negra does not guarantee the accuracy or completeness of the data. Content is community-curated and may be subject to revision; it should not replace advice from a qualified botanist. This species may be toxic, invasive, or subject to legal restrictions — verify before handling or cultivating. Jardín Roca Negra accepts no liability for any harm arising from reliance on this information. Images are reproduced under Creative Commons or equivalent free licenses; credits are noted below each image.