Aridaria macrosiphon L.Bolus
Large-siphon aridaria
Aridaria macrosiphon is a mesemb endemic to South African Namaqualand, described by L. Bolus. The specific epithet 'macrosiphon' (Greek: large tube) alludes to the long floral tube shared with other species in the genus. The opposite leaves are fleshy and greyish-green, and the plant forms small creeping mats on quartz soils.
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© (c) Alexey Yakovlev, some rights reserved (CC BY-SA 2.0)
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Overview
| Category | Classification |
|---|---|
| Family | Aizoaceae |
| Genus | Aridaria |
| Growth Habit | Creeping perennial succulent; opposite fleshy leaves arranged in low rosettes. Summer dormancy. |
| Conservation Status | Data deficient (DD); endemic to a restricted area. |
| pH Target | 6.5–7.5 |
| Type | Pure mineral sand or quartzite grit, without organic matter |
Origin & Habitat
Morphology
Opposite, succulent, semi-cylindrical, greyish-green leaves with obtuse apex.
ecoSolitary flowers with long tube (macrosiphon), white or pale pink petals. Flowering in winter.
ecoHygroscopic dehiscent capsule; seeds dispersed by rain.
ecoLow, compact mat close to the ground; leaves partially buried in quartzite substrate.
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Requirements
Soil & Substrate
Type
Pure mineral sand or quartzite grit, without organic matter
groups Beneficial Associations
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Propagation Strategy
- 1 Sow on fine mineral substrate without covering seeds
- 2 Mist with water and cover with transparent plastic
- 3 Keep at 15–20 °C with bright indirect light
- 4 Remove cover after germination; transplant carefully
T
Watering in summer
Every 3–4 years in autumn
Very diluted mineral fertilizer, once at the start of autumn. No fertilizer in summer.
Uses & Applications
Precautions / Toxicity
Non-toxic; no known toxicity reports.
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Plant Health
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"A. macrosiphon and A. longituba represent within the genus Aridaria a convergence in the long-tube floral strategy that may be associated with pollination by specific nocturnal Lepidoptera of Namaqualand."
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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.