Corunastylis capparina

Corunastylis capparina is a small terrestrial orchid endemic to Victoria. It is one of the midge orchids and has a single thin leaf fused to the flowering stem and up to twenty small, green flowers with purple markings. It is a rare species, found only in a small area in the south-east of the state.

Corunastylis capparina
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Diurideae
Genus: Corunastylis
Species:
C. capparina
Binomial name
Corunastylis capparina

Description

Corunastylis capparina is a terrestrial, perennial, deciduous, herb with an underground tuber and a single thin leaf fused to the flowering stem. Between two and twenty flowers are arranged along a flowering stem 10–30 mm (0.4–1 in) long, reaching to a height of 80–250 mm (3–10 in) and taller than the leaf. The flowers are green with purple markings, sometimes entirely purple and are 3.5–4 mm (0.14–0.16 in) wide. As with others in the genus, the flowers are inverted so that the labellum is above the column rather than below it. The dorsal sepal is broadly egg-shaped, about 3 mm (0.1 in) long and 2.5 mm (0.1 in) wide. The lateral sepals are linear to lance-shaped, 4–4.5 mm (0.16–0.18 in) long, 1–1.5 mm (0.04–0.06 in) wide and spread apart from each other. The petals are lance-shaped to egg-shaped, about 2.5 mm (0.1 in) long and 1 mm (0.04 in) wide with darker edges and a pointed tip. The labellum is wedge-shaped, thick and fleshy, 2.5–3 mm (0.098–0.12 in) long and 1.5–2 mm (0.06–0.08 in) wide with slightly wavy edges. There is a narrow egg-shaped callus in the centre of the labellum and extending almost to its tip. Flowering occurs in March and April.[2]

Taxonomy and naming

Corunastylis capparina was first formally described in 2016 by David Jones from a specimen collected in the Blond Bay Wildlife Reserve and the description was published in the Australian Orchid Review.[1] The specific epithet (capparina) is a vague Latin word meaning greenish-brown, referring to the colour of the flowers of this species.[1]

Julian Shaw has proposed changing the name of this orchid to Genoplesium capparinum. The World Checklist of Selected Plant Families lists both Genoplesium capparinum and Corunastyis capparina as "unplaced names".[3][4]

Distribution and habitat

This midge orchid grows in heath and heathy forest between Sale and Bairnsdale.[2]

References
  1. "Corunastylis capparina". APNI. Retrieved 30 January 2018.
  2. Jeanes, Jeff. "Corunastylis capparina". Royal Botanic Gardens Victoria. Retrieved 31 January 2018.
  3. "Genoplesium capparinum". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
  4. "Corunastylis capparina". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
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