Bergeranthus vespertinus (A.Berger) Schwantes
Evening bergeranthus
Bergeranthus vespertinus is a singular species within the genus due to its vespertine flowering: unlike its relatives, the flowers open at dusk rather than during the day. It forms caespitose clumps of rosettes with glaucous triangular leaves and produces characteristic yellow flowers. It is endemic to the Uitenhage region of the South African Eastern Cape, growing in rocky and sandy fynbos and Karoo shrubland soils.
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© Giftzwerg 88, CC BY-SA 4.0, via Wikimedia Commons
CC BY-SA 4.0
Overview
| Category | Classification |
|---|---|
| Family | Aizoaceae |
| Genus | Bergeranthus |
| Growth Habit | Caespitose perennial succulent; rosettes of glaucous triangular leaves. Vespertine flowering (unique characteristic in the genus). Active growth in both summer and winter. |
| Conservation Status | Least Concern (LC); endemic to a relatively restricted area but with known stable populations in protected habitats. |
| pH Target | 6.5–7.5 |
| Type | Sandy-gravelly, very well-drained |
Origin & Habitat
Morphology
Triangular, fleshy, 3–5 cm long, glaucous (with a bluish waxy coating). Upper surface nearly flat; lower surface keeled. Apex slightly acute.
ecoYellow, vespertine, 2.5–3.5 cm in diameter, with numerous linear petals. Open at dusk and remain open through the night and early morning. Flowering in summer-autumn.
ecoModerately extensive fibrous roots. The root system is deeper than in B. multiceps, adapted to stony substrates.
ecoCompact clump 5–12 cm tall. Caespitose habit characteristic of the genus but with more glaucous leaves and vespertine flowers that visually distinguish it.
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Requirements
Soil & Substrate
Type
Sandy-gravelly, very well-drained
groups Beneficial Associations
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Propagation Strategy
- 1 Divide the clump in spring, separating rosettes with roots
- 2 Allow to callous for 2 days in shade without watering
- 3 Plant in dry mineral substrate and water lightly after one week
- 1 Sow in spring on fine sand without covering seeds
- 2 Keep moist at 20–25 °C under transparent film
- 3 Ventilate daily; transplant when seedlings reach 2–3 cm
V
Excess watering in winter
Every 2–3 years in spring
Very diluted mineral fertilizer (1/4 dose) once in spring. No fertilizer the rest of the year.
Uses & Applications
Precautions / Toxicity
Non-toxic
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Plant Health
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"The vespertine flowering of B. vespertinus suggests a different pollination strategy from the rest of the genus, likely targeting crepuscular or nocturnal pollinators rather than diurnal bees. This unusual behaviour in Mesembryanthemaceae makes it a subject of interest for floral biology studies."
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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.