At a glance
RECORDED PROFILE DATA- Scientific name
- Angraecum rutenbergianum Kraenzl.
- Name status
- Accepted (Kew POWO)
- Native region
- Madagascar (central highlands)
- Growth habit
- Lithophytic/subshrub, monopodial epiphyte or lithophyte
- Cultivation temperature group
- Cool to intermediate (≈10‑22 °C)
How to Identify This Species
Angraecum rutenbergianum is a miniature, monopodial orchid forming a short, erect stem that rarely exceeds a few centimeters in height. The leaves are stiff, leathery, somewhat keeled and arranged in an almost equitant (overlapping) fashion; they are typically 0.5–6 cm long and display a dull, dusty‑green coloration.[9] The plant bears a single flower on an axillary inflorescence 3 cm long. The flower is white with a greenish lip, measuring about 5.5 cm across, and possesses a long, narrow spur (≈5 cm) that remains tightly coiled in bud. Fragrance is strong, spicy, and most noticeable at dusk, a characteristic that has led to its description as “night‑scented.”[9][7] The combination of succulent, nearly equitant leaves, a broadly elliptic lip, and a spur lacking a pronounced nasal projection helps separate it from close relatives such as A. didieri and A. elephantinum (which have different leaf and lip morphologies).[9]
Frequently asked questions
What light conditions does Angraecum rutenbergianum need?
Growers report that the species thrives under moderate shade (approximately 70 % shading) or bright indirect light. Direct midday sun should be avoided to prevent leaf scorching.[5][10]
How often should I water a mounted Angraecum rutenbergianum?
When mounted, the plant benefits from frequent misting or watering – often daily during the active growth period – with a reduction in watering during the cooler, drier months.[5][10]
When does Angraecum rutenbergianum flower?
In its native habitat the species blooms in spring through early summer, and cultivated plants in temperate greenhouses report the same period.[9][7]
FOLLOW THE EVIDENCE
Sources & references
- Angraecum rutenbergianum Kraenzl. | Plants of the World Online | Kew Science – https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:616389-1
- Angraecum rutenbergianum | International Plant Names Index – https://ipni.org/n/616389-1
- Perrierangraecum rutenbergianum (Kraenzl.) Szlach., Mytnik & Grochocka | Plants of the World Online | Kew Science – https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77139232-1
- IOSPE PHOTOS – Angraecum rutenbergianum – https://www.orchidspecies.com/angrutenbergianum.htm
- Angraecum rutenbergianum – Gary Yong Gee – https://yonggee.name/articles/angraecum-rutenbergianum/
- Isle of Portland Orchids – Angraecum rutenbergianum – https://www.isleofportlandorchids.co.uk/orchid-information-pages/angraecum-rutenbergianum
- Angraecum rutenbergianum « orchid.guru – https://www.orchid.guru/content/orchids/a/angraecum/rutenbergianum/
