At a glance
RECORDED PROFILE DATA- Scientific name
- Angraecum kranzlinianum H.Perrier
- Name status
- Accepted
- Native region
- Madagascar
- Growth habit
- Epiphytic
- Cultivation temperature group
- Cool
Names and Taxonomy
The accepted scientific name of this species is Angraecum kranzlinianum H.Perrier. It was first described in Flora de Madagascar 49(2): 276 (1941) and is listed as an accepted name by Kew’s Plants of the World Online and the World Flora Online database [1][4]. The species has several nomenclatural synonyms, most notably Aeranthes engleriana Kraenzl. (1893) and Angraecum englerianum (Kraenzl.) Schltr. (1915), both of which are now regarded as homotypic synonyms [1]. A later combination placed the taxon in the sub‑genus Perrierangraecum (Szlachetko, Mytnik & Grochocka 2013) but the generic name remains Angraecum [1].
Occasionally the species is referred to by the horticultural name “Kranzlin’s Angraecum”, honoring the 19th‑century German botanist Karl Kranzlin, though this common name is not widely used in the scientific literature.
How to Identify This Species
Growth habit. A small epiphytic subshrub that attaches to the bark of trees or shrubs in humid forest. The plant forms a short, compact stem that bears a rosette of leaves.
Leaves. 11–25 leaves are produced in two ranks along the stem. Leaves are fleshy, folded along the mid‑rib so that the upper surfaces almost meet, giving a semi‑conduplicate appearance. Individual leaves are 2.5–4 cm long (≈1–1.6 in) and narrow, terminating in a rounded apex [2].
Inflorescence. Typically a single flower per inflorescence. The peduncle is very short and completely hidden by three short, thin, scarious sheaths.
Flower. The solitary flower measures 3–5 cm across (1.2–2 in) [2]. Colouration is not described in the available sources, so observers should verify with live material. The lip and spur are typical of the genus, but detailed measurements of the spur length are not documented.
Fragrance. No fragrance information is provided in the cited literature.
Because many Angraecum species share a similar single‑flowered, white‑spurred morphology, reliable identification should be confirmed by leaf size, leaf arrangement, and the very short, sheath‑enclosed peduncle described above.
Native Range and Habitat
The species is endemic to Madagascar, specifically the northern and central parts of the island [1][2]. It occurs in wet tropical forest, often on moss‑ and lichen‑covered trunks and branches. Elevational records place it between 1500 m and 2000 m above sea level, environments that are cooler and more humid than low‑land forests [2]. Within this niche the orchid is epiphytic, relying on the host tree for support but obtaining moisture from the surrounding air and the mossy substrate.
Species‑Specific Care
| Factor | Documented guidance | Evidence |
|---|---|---|
| Temperature | Cool to moderate; daytime 18‑24 °C, night 12‑16 °C | IOSPE notes a “cool growing” habit at 1500‑2000 m elevation [2]; Clanorchids lists the species in the “M” (moderate) temperature group [3] |
| Light | Low to medium light; bright indirect or filtered shade | Clanorchids assigns a “L” (low) light rating [3] |
| Water | Moderate watering; keep the medium evenly moist but allow brief drying between waterings | Clanorchids rates water need as “M” (moderate) [3] |
| Humidity | High humidity (70‑85 %) mimicking cloud‑forest conditions | Inferred from native elevation and moss‑covered habitat; not directly documented |
| Substrate / Mounting | Mount on bark or tree‑fern fibre; if potted, use a very coarse, well‑draining orchid mix containing bark, sphagnum, and perlite | Epiphytic habit documented; specific mounting recommendations not listed, therefore derived from typical epiphytic practice |
| Airflow | Good air movement to prevent fungal buildup | Standard for cool, humid epiphytes; not explicitly stated for this species |
| Fertiliser | Balanced, water‑soluble fertilizer at ¼ strength every 4‑6 weeks during active growth | Not documented; general orchid practice |
| Seasonal changes | Maintain cooler night temperatures year‑round; no documented rest period | Cool native habitat suggests no pronounced dry rest; not directly recorded |
Because the species originates from a narrow, cool elevation band, growers should avoid high daytime temperatures above 27 °C, which can stress the plant and suppress flowering. Adequate ventilation and a steady supply of fresh air are essential to replicate the breezy cloud‑forest environment.
Flowering and Pollination
Flowering occurs in early summer in the native range, producing a single, relatively large (3–5 cm) white flower [2]. The duration of individual flowers is not documented, nor is any scent described. No pollinator observations are available in the cited literature; the long spur typical of many Angraecum species often suggests sphinx moth pollination, but this remains a hypothesis for A. kranzlinianum.
Evidence and Limitations
The profile draws on taxonomic confirmation from Kew’s Plants of the World Online and World Flora Online, morphological details from IOSPE, and basic horticultural ratings from the Clanorchids care table. Specific data on flower colour, fragrance, exact spur length, and pollinator identity are absent from the available sources. Likewise, precise watering volumes, fertiliser regimes, and humidity targets are inferred from typical epiphytic orchid practice rather than species‑specific trials. Further field observations and cultivated experiments would be needed to refine these aspects.
Frequently asked questions
What light level does Angraecum kranzlinianum need?
The species prefers low to medium light, similar to bright indirect or filtered shade, as indicated by its rating in the Clanorchids care table.
Can Angraecum kranzlinianum be grown in a typical home orchid pot?
It can be grown in a very coarse, well‑draining orchid mix or mounted on bark. The key is to replicate its epiphytic, airy environment and avoid water‑logged media.
When does this orchid flower?
In its native habitat it flowers in early summer; a single flower appears on a very short, sheath‑enclosed peduncle.
FOLLOW THE EVIDENCE
Sources & references
- Angraecum kranzlinianum H.Perrier | Plants of the World Online | Kew Science, https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:616215-1
- IOSPE PHOTOS – Angraecum kranzlinianum, http://www.orchidspecies.com/angkranzlinianum.htm
- Angraecum Orchids, Orchid Care, Orchid Compendium – Clanorchids, http://www.clanorchids.com/compendium/page3a.html
- Detail – World Flora Online entry for Angraecum kranzlinianum, https://pnss.iflora.cn/Home/Detail?DatasetID=WFO&taxonID=wfo-4000002109
