Epidendrum radicans Pav. ex Lindl.

First published in Gen. Sp. Orchid. Pl.: 104 (1831)
This species is accepted
The native range of this species is Mexico to Colombia. It is a perennial or subshrub and grows primarly in the wet tropical biome(s). It is has environmental uses and as a medicine.

Descriptions

Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

Distribution
Nativa en Colombia; Alt. 1000 - 2400 m.; Andes, Valle del Cauca.
Morphology General Habit
Hierba, epífita
Conservation
No Evaluada
[CPLC]

Distribution
Biogeografic region: Andean. Elevation range: 1000–2400 m a.s.l. Native to Colombia. Colombian departments: Antioquia, Caldas, Cauca, Risaralda, Tolima, Valle del Cauca.
Habit
Herb, Epiphyte.
Ecology
Habitat according IUCN Habitats Classification: forest and woodland, shrubland, native grassland, artificial - terrestrial.
[UPFC]

Kew Species Profiles

General Description

A terrestrial orchid from tropical and subtropical America, Epidendrum radicans is often seen on roadsides or in grassland, clambering over vegetation. Its spectacular bright orange and yellow flowers are appreciated by some orchid enthusiasts. However, the plant is too vigorous for most collections and would soon take up too large a space.

The flowers of E. radicans are superficially similar to those of two common plants (Asclepias curassavicia and Lantana camara) that often grow alongside it. This led some to believe that E. radicans, which does not produce nectar, had evolved as a mimic of the others, which do. However, research by Bierzychudek in 1981 did not support this hypothesis.

Species Profile
Geography and distribution

Epidendrum radicans is native to southern Mexico, Costa Rica, El Salvador, Honduras, Nicaragua, Panama and Colombia.

Widely cultivated as an ornamental, E. radicans has become naturalised in some parts of Africa, Asia and Australia, predominantly on disturbed sites.

Description

Overview: Sympodial (producing each new growth from the base of the old growth) orchid with long, cane-like stems, each with a terminal inflorescence.

Stems & leaves: Stems up to 100 cm long and 1 cm in diameter. Oval, fleshy leaves set at regular intervals along the stem. Conspicuous, white, fleshy, aerial roots emerge from the leaf axils of new growth and aid entanglement with supporting vegetation.

Flowers: Clusters of 20-30 individual flowers are held at the end of a long stalk, the whole inflorescence being up to 50 cm long.

Flowers are small and bright orange with a yellow column. They have ovate sepals and petals, and the lip is three-lobed. Each lobe is fringed and usually a lighter orange than the tepals, fading to yellow at the base of the lip.

The column (fused male and female parts) and lip are fused together, forming a single structure. Flowers are pollinated by butterflies, the proboscis of which can fit into the resulting narrow tube.

Uses

Epidendrum radicans is cultivated as an ornamental (as a garden plant in tropical regions and pot-plant elsewhere) and is also grown for cut-flowers.

It is only rarely used for producing hybrids due to its vigorous nature and because its stems tend not to be self-supporting.

Millennium Seed Bank: Seed storage

The Millennium Seed Bank Partnership aims to save plant life worldwide, focusing on plants under threat and those of most use in the future. Seeds are dried, packaged and stored at a sub-zero temperature in our seed bank vault.

A collection of Epidendrum radicans seeds is held in Kew's Millennium Seed Bank based at Wakehurst in West Sussex.

Cultivation

Epidendrum radicans should be kept at a temperature of 21-28°C, with a winter minimum of 12°C. It can be grown in an open medium (such as bark chips or charcoal) or as an epiphyte, for example by attaching a cutting to cork bark.

Due to its vigorous nature it is impractical to grow E. radicans among other plants unless support is provided and stems are regularly tied-in. The growing medium should be kept moist, without allowing the plant to sit in water (which can rot stems and roots). Weak fertiliser should be applied (usually a quarter of the stated dose for general plant fertilisers).

This species at Kew

Epidendrum radicans is grown in the behind-the-scenes Tropical Nursery at Kew.

Dried and alcohol-preserved specimens of Epidendrum radicans are held in Kew's Herbarium, where they are available to visitors from around the world, by appointment. The details of some of these specimens can be seen online in Kew's Herbarium Catalogue.

Distribution
Costa Rica, Mexico
Ecology
Upland areas, often on roadsides or near disturbed ground.
Conservation
Not assessed according to IUCN Red List criteria.
Hazards

None known.

[KSP]

Uses

Use Environmental
Environmental uses.
Use Medicines
Medical uses.
[UPFC]

Use
Ornamental.
[KSP]

Common Names

English
Crucifix Orchid, Ground-rooting epidendrum

Sources

  • Catálogo de Plantas y Líquenes de Colombia

    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Colombian resources for Plants made Accessible

    • ColPlantA 2021. Published on the Internet at http://colplanta.org
    • https://creativecommons.org/licenses/by/4.0/
  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/
  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Living Collection Database

    • Common Names from Royal Botanic Gardens, Kew Living Collection https://www.kew.org/
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Science Photographs

    • Copyright applied to individual images
  • Kew Species Profiles

    • Kew Species Profiles
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Useful Plants and Fungi of Colombia

    • http://creativecommons.org/licenses/by-nc-sa/3.0