Thelymitra polychroma
From Wikipedia, the free encyclopedia
| Rainbow sun orchid | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Monocots |
| Order: | Asparagales |
| Family: | Orchidaceae |
| Subfamily: | Orchidoideae |
| Tribe: | Diurideae |
| Genus: | Thelymitra |
| Species: | T. polychroma |
| Binomial name | |
| Thelymitra polychroma | |
Thelymitra polychroma, commonly called rainbow sun orchid,[2] is a species of orchid that is endemic to Tasmania. It has a single narrow, fleshy leaf and up to four blue and mauve flowers with darker veins. It grows in windswept heath and swampy areas and the flowers are self-pollinated.
Thelymitra polychroma is a tuberous, perennial herb with a single fleshy, channelled, linear leaf 100–200 mm (4–8 in) long and 4–8 mm (0.2–0.3 in) wide. Up to four blue and mauve flowers with darker veins and a few small spots, 15–20 mm (0.6–0.8 in) wide are arranged on a flowering stem 100–250 mm (4–10 in) tall. The sepals and petals are 7–11 mm (0.3–0.4 in) long and about 5 mm (0.2 in) wide. The column is pink and purple with a shiny pink base and blue edges, about 5 mm (0.20 in) long and 2.5 mm (0.1 in) wide. The lobe on the top of the anther is brown with a yellow tip and wrinkled back. The side lobes have dense, mop-like tufts of cream-coloured hairs. Flowering occurs in November and December but the flowers are self-pollinated and only open on hot days. Flowering is more prolific after fire the previous summer.[2][3]