At a glance
RECORDED PROFILE DATA- Scientific name
- Angraecum rigidifolium H.Perrier
- Name status
- Accepted
- Native region
- Madagascar (central)
- Growth habit
- Epiphytic subshrub
- Cultivation temperature group
- Cool
Names and Taxonomy
Angraecum rigidifolium H.Perrier is the accepted name for this species. It was first described in Notulae Systematicae 7:116 (1938) [1]. A later homotypic synonym is Perrierangraecum rigidifolium (H.Perrier) Szlach., Mytnik & Grochocka (2013) [1]. No common name is documented in the available sources.
How to Identify This Species
The plant is a miniature epiphytic subshrub reaching about 30 cm in height [7]. It has an erect, flattened stem that is largely concealed by a series of dorsally ribbed, nine‑veined sheaths. The leaves are arranged in two ranks, oblong‑linear, bilobed at the apex, and are stiff (hence the epithet “rigid”).
Inflorescences are short, axillary, usually single‑flowered, and arise from the upper part of the stem, each flower being about 2.5 cm (1 inch) across [5]. Flowers are white, fragrant, and possess a short spur typical of many Angraecum species. The lip is modestly sized and does not display prominent markings.
Native Range and Habitat
Angraecum rigidifolium is endemic to central Madagascar, occurring in wet tropical rainforests that are rich in mosses and lichens [1]. It grows as an epiphyte on tree trunks, typically at elevations around 1300 m above sea level [5]. The habitat is characterized by high humidity, frequent mist, and a cool, montane climate.
Species‑Specific Care
| Factor | Documented guidance | Evidence |
|---|---|---|
| Temperature | Cool conditions (day 12‑20 °C, night 8‑15 °C) reflecting its montane origin. | Described as a “cool growing” epiphyte [5] |
| Light | Bright to intermediate light; avoid direct midday sun. | Epiphytic rainforest habit implies filtered canopy light [1] |
| Humidity | Maintain high humidity (70 % +), with good air circulation. | Native wet tropical biome [1] |
| Watering | Keep the medium consistently moist but not water‑logged; mist frequently. | Epiphytic on moss‑rich trunks suggests constant moisture [1] |
| Substrate / Mounting | Mount on bark or a well‑draining orchid mix with added coarse material; avoid heavy pots. | Epiphytic growth habit [1] |
| Fertilisation | Apply a balanced orchid fertilizer at ½ strength once a month during active growth. | General orchid practice; species‑specific recommendation not documented. |
| Repotting / Re‑mounting | Minimise disturbance; re‑mount only when roots outgrow the medium. | Typical for epiphytic Angraecum; no species‑specific data. |
Because the species is naturally a cool‑growing, high‑humidity epiphyte, growers who can provide these conditions are most likely to achieve healthy growth and flowering. No published cultivation protocol exists beyond the observations above.
Flowering and Pollination
Flowering occurs in the middle of the summer season in its native range, producing a single white flower about 2.5 cm across [5]. The blossoms are fragrant, a trait noted in several orchid databases [7]. No specific pollinator has been recorded for this species; pollination mechanisms remain undocumented.
Evidence and Limitations
Key aspects such as precise temperature ranges, fertilisation schedules, and pollinator identity are not fully documented for Angraecum rigidifolium. The care table combines habitat‑derived inference with the limited horticultural note that the species is “cool growing.” Further field studies and cultivation trials would be needed to refine these recommendations.
Frequently asked questions
What temperature range does Angraecum rigidifolium prefer?
It is described as a cool‑growing species, so daytime temperatures around 12‑20 °C and cooler nights (8‑15 °C) are recommended, reflecting its native montane rainforest habitat.
Is Angraecum rigidifolium fragrant?
Yes, the flowers are reported to be fragrant in several orchid databases.
When does this orchid flower in the wild?
Flowering has been observed in mid‑summer in its central Madagascar habitat.
FOLLOW THE EVIDENCE
Sources & references
- Angraecum rigidifolium H.Perrier | Plants of the World Online | Kew Science, https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:616380-1
- IOSPE PHOTOS – Angraecum rigidifolium, https://www.orchidspecies.com/angrigidifolium.htm
- Angraecum rigidifolium – NativePlants.info, https://www.nativeplants.info/plant/magnoliophyta-flowering-plants/orchidaceae/angraecum/angraecum_rigidifolium.html
- Perrier de la Bâthie, H. (1938). Sarcanthae nouvelles ou peu connues de Madagascar (fin). Notulae Systematicae 7(3): 105‑139.
