Angolluma subterranea (E.A.Bruce & P.R.O.Bally) Plowes
Underground angolluma
One of the most extraordinary adaptations of the genus: most of the stem grows underground and only the flower stalks emerge to the surface. This strategy reduces water loss through transpiration in its extremely arid habitat in the interior of Kenya and Tanzania.
chevron_right edit_note Proposed edits auto-approved at +3 net votes
No pending proposals for this section.
Overview
| Category | Classification |
|---|---|
| Family | Apocynaceae |
| Genus | Angolluma |
| Growth Habit | Subterranean; only the flower stalks (1–3 cm) emerge above ground during flowering |
| Conservation Status | Data Deficient (IUCN) |
| pH Target | 6.5–7.5 |
| Type | Sandy, very well-drained, low in nutrients |
Origin & Habitat
Morphology
Subterranean, succulent, angular, 3–8 cm long, whitish to pale green due to absence of direct light
ecoStar-shaped, triangular brownish-purple petals, 1–2 cm diameter; emerge directly from soil on short stalks
ecoUnderground stems also function as water storage organs; secondary fibrous roots
ecoAt rest completely invisible; in flower only small star-shaped flowers are seen emerging from the ground
ecochevron_right edit_note Proposed edits auto-approved at +3 net votes
No pending proposals for this section.
Requirements
Soil & Substrate
Type
Sandy, very well-drained, low in nutrients
groups Beneficial Associations
chevron_right edit_note Proposed edits auto-approved at +3 net votes
No pending proposals for this section.
Propagation Strategy
U
U
Every 3–4 years in spring with great care
No fertilizer or minimal (1/4 cactus dose) once a year in spring
Uses & Applications
Precautions / Toxicity
Some stapeliads contain cardiac glycosides; keep away from pets
chevron_right edit_note Proposed edits auto-approved at +3 net votes
No pending proposals for this section.
Plant Health
chevron_right edit_note Proposed edits auto-approved at +3 net votes
No pending proposals for this section.
"Exceptional species for its extreme geophytic habit. Described by Bruce and Bally. In cultivation requires a tall pot to accommodate the underground stems; very difficult outside specialised collections. Synonym: Caralluma subterranea E.A.Bruce & P.R.O.Bally."
chevron_right edit_note Proposed edits auto-approved at +3 net votes
No pending proposals for this section.
Scientific Integrity
🟡 MediumVote to help validate this record
Sources
Loading…
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.