Common Names: Ewwa-trewwa, Goue-trewwa, Ouma-trewwa, Rooi-trewwa
With its brightly coloured yellow or orange-red flowers, Satyrium coriifolium is one of the most attractive terrestrial orchids of the Cape Floristic Region. It is also one of the few species in its genus that is suitable for cultivation.
The plants are perennial and have large underground tubers which enable them to survive the dry summer. Stems are mostly 25 to 50 cm tall and are normally very robust. Satyrium coriifolium can readily be distinguished from all others in its genus by its stiff leathery, semi-erect leaves with orange-red bars near the sheathing bases.
The flower spike with its bright orange or yellow, comparatively large nodding flowers is very striking. As is typical in the genus Satyrium, the flowers are 'non-resupinate' (meaning that their hood-like lip faces up while the sepals and petals point down). The lip has generally two spurs in Satyrium, which is unique in orchids. The main flowering time of the species is from August through to November, depending on the available moisture in the habitat of the plants.
Satyrium coriifolium is found in the western and eastern parts of the Cape Floristic Region from Cape Town to Grahamstown, and northwards as far as Clanwilliam. Its most common habitat is moist, sandy flats below 300 m above sea level (rarely up to 750 m). Colonies are often extensive and may consist of hundreds of plants. Though not essential for flowering, fire appears to have a marked enhancing effect on the flowering as in many other Cape orchids.
It is hardly surprising that the bright flowers of this species attract sunbirds. The birds perch on the sturdy stems of the plants and feed on the nectar in their flowerIn the process, the pollinia (orchid pollen is normally united to form clumps termed 'pollinia') are attached to the bird's beaks. Bird species involved are mainly Malachite Sunbirds, but also occasional visits by Orange-breasted Sunbirds and Lesser Double-collared Sunbirds have been reported.
Growing orchids from seed is a fairly specialized undertaking and it requires a bit of understanding of tissue culture techniques. If you have never grown orchids from seed we recommend that before attempting this you should first contact your local Orchid Society, or purchase a book on the subject, or both!
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