Thelymitra atronitida

Last updated

Black-hooded sun orchid
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Diurideae
Genus: Thelymitra
Species:
T. atronitida
Binomial name
Thelymitra atronitida

Thelymitra atronitida, commonly called the black-hooded orchid, [2] is a species of orchid that is endemic to south-eastern Australia. It has a single erect, leathery, leaf and up to eight moderately dark blue, self-pollinating flowers that only open on hot days.

Contents

Description

Thelymitra atronitida is a tuberous, perennial herb with a single erect, leathery, channelled, dark green, linear to lance-shaped leaf 150–350 mm (6–10 in) long and 5–12 mm (0.2–0.5 in) wide with a purplish base. Between two and eight moderately dark blue flowers 20–26 mm (0.8–1 in) wide are arranged along a flowering stem 300–500 mm (10–20 in) tall. The sepals and petals are 10–13 mm (0.4–0.5 in) long and 3–8 mm (0.1–0.3 in) wide. The column is pale blue, 3–4 mm (0.1–0.2 in) long and about 2 mm (0.08 in) wide. The lobe on the top of the anther is glossy black with a yellow inflated tubular, gently curved tip with a notched end. The side lobes curve upwards and have, toothbrush-like tufts of white hairs. Flowering occurs in October and November but the flowers open only on hot days. [2] [3] [4] [5]

Taxonomy and naming

Thelymitra atronitida was first formally described in 2000 by Jeff Jeanes and the description was published in Muelleria [4] from a specimen collected near Genoa. [6] The specific epithet (atronitida) is derived from the Latin words ater meaning "black" [7] :111 and nitida meaning "bright", "shining" or "elegant", [7] :481 referring to the colour of the anther lobe. [8]

Distribution and habitat

The black-hooded sun orchid grows in heathy open forest and grasstree plains in eastern New South Wales, far north-eastern Victoria and eastern Tasmania. [2] [5] [8]

Conservation

This orchid is only known from two locations in New South Wales, where it is classified as "critically endangered" under the Biodiversity Conservation Act 2016 . [9] It is only known from five locations in Tasmania and is listed as "endangered" under the Threatened Species Protection Act 1995 in that state. [10]

Related Research Articles

<i>Thelymitra malvina</i> Species of orchid

Thelymitra malvina, commonly called the mauve-tufted sun orchid, is a species of orchid that is native to eastern Australia and New Zealand. It has a single large, fleshy leaf and up to twenty five blue to mauve flowers with pink or mauve tufts on top of the anther.

<i>Thelymitra megacalyptra</i> Species of orchid

Thelymitra megacalyptra, commonly called the plains sun orchid, is a species of orchid that is endemic to eastern Australia. It has a single erect, fleshy leaf and up to fifteen blue to purplish, sometimes lilac, pink or white flowers with white tufts on top of the anther. It is known as Thelymitra megcalyptra by some authorities.

<i>Thelymitra arenaria</i> Species of orchid

Thelymitra arenaria, commonly called the forest sun orchid, is a species of orchid that is endemic to south-eastern Australia. It has a single long, narrow leaf and up to sixteen purplish self-pollinating flowers which only open on hot days.

Thelymitra bracteata, commonly called the leafy sun orchid or large-bracted sum orchid, is a species of orchid that is endemic to south-eastern Australia. It has a single leathery, more or less flat leaf and up to thirty pale blue flowers that are greenish on the back. The bracts are larger than on similar sun orchids.

<i>Thelymitra brevifolia</i> Species of orchid

Thelymitra brevifolia, commonly called the peppertop sun orchid or short-leaf sun orchid, is a species of orchid that is endemic to south-eastern Australia. It has a single erect, relatively short and broad, dark green leaf and up to twenty purplish or purplish blue flowers. It is a common and widespread self-pollinating species occurring in a wide range of habitats.

Thelymitra exigua, commonly called the short sun orchid, is a species of orchid that is endemic to south-eastern Australia. It has a single fleshy, channelled, dark green leaf and up to eight relatively small pale blue flowers with white toothbrush-like tufts on top of the anther.

<i>Thelymitra graminea</i> Species of orchid

Thelymitra graminea, commonly called the shy sun orchid, is a species of orchid in the family Orchidaceae and is endemic to the south-west of Western Australia. It has a single leathery, channelled leaf and up to ten relatively small blue, self-pollinating flowers with white, toothbrush-like tufts on the top of the anther.

<i>Thelymitra holmesii</i> Species of orchid

Thelymitra holmesii, commonly called the blue star sun orchid, is a species of orchid that is endemic to south-eastern Australia. It has a single long, narrow, fleshy leaf and up to nine purplish blue to mauve flowers with a deeply notched lobe on top of the anther.

<i>Thelymitra peniculata</i> Species of orchid

Thelymitra peniculata, commonly called the trim sun orchid, is a species of orchid that is endemic to southern eastern Australia. It has a single long, erect, fleshy, channelled leaf and up to eighteen deep blue to purple self-pollinating flowers.

Thelymitra planicola, commonly called the glaucous sun orchid, is a species of orchid that is endemic to southern eastern Australia. It has a single erect, leathery, channelled, dark green leaf and up to twelve blue flowers with darker veins. The plant has a bluish green hue and the flowers are self-pollinating, only opening widely on hot days.

Thelymitra reflexa, commonly called the reflexed sun orchid, is a species of orchid that is endemic to Victoria. It has a single erect, fleshy, channelled leaf and up to six bluish purple flowers. The sepals and petals are strongly turned back towards the ovary but only on hot days when the flowers open.

Thelymitra inflata, commonly called the inflated sun orchid, is a species of orchid that is endemic to south eastern Australia. It has a single long, erect, linear leaf and up to six dark blue to purplish flowers with a very inflated lobe on top of the anther.

Thelymitra lucida, commonly called the glistening sun orchid, is a species of orchid that is endemic to south eastern Australia. It has a single erect, fleshy leaf and up to seven dark blue flowers with the sepals a lighter blue than the petals.

<i>Thelymitra epipactoides</i> Species of orchid

Thelymitra epipactoides, commonly called the metallic sun orchid, is a species of orchid that is endemic to south-eastern continental Australia. It has a single relatively large, leathery leaf and up to twenty large flowers that range in colour from pink to reddish but have a distinctive arrangement of lobes above the anther.

Thelymitra alpicola, commonly called the alpine striped sun orchid, is a species of orchid that is endemic to eastern Australia. It has a single erect, dark green grass-like leaf and up to six relatively large, deep purplish blue flowers with darker streaks. It grows in subalpine to montane habitats.

Thelymitra incurva, commonly called the coastal striped sun orchid, is a species of orchid that is endemic to south-eastern Australia. It has a single erect, dark green grass-like leaf and up to seven relatively large, pale blue flowers lacking the darker veins of some other thelymitras, especially the otherwise similar striped sun orchid. It grows in coastal areas of far south-eastern New South Wales and north-eastern Victoria.

<i>Thelymitra benthamiana</i> Species of orchid

Thelymitra benthamiana, commonly called the leopard sun orchid or blotched sun orchid, is a species of orchid in the family Orchidaceae and is endemic to Australia. It has a single leathery leaf and up to ten yellowish green flowers with brownish spots, blotches and patterns. The column is yellow with deeply fringed wings and the lobe on top of the anther has a large lump on its top.

Thelymitra jacksonii, commonly called the Jackson's sun orchid, is a species of orchid in the family Orchidaceae and endemic to the south-west of Western Australia. It has a single erect, flat, leathery leaf and up to twelve dark golden brown flowers with yellow streaks and blotches. The column has broad, spreading wings with a wide fringe.

<i>Thelymitra magnifica</i> Species of orchid

Thelymitra magnifica, commonly called the Crystal Brook sun orchid, is a species of orchid in the family Orchidaceae and is endemic to a small area in the south-west of Western Australia. It has a single erect, flat, leathery leaf and up to eight crowded, dark golden brown flowers with yellow streaks and blotches. The column has broad, deeply fringed, yellow or brownish wings.

Thelymitra paludosa, commonly known as the plain sun orchid, is a species of orchid that is endemic to Western Australia. It has a single erect, channelled, dark green leaf and up to ten or more blue to violet flowers. It grows in higher rainfall areas near the south coast.

References

  1. "Thelymitra atronitida". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
  2. 1 2 3 Jones, David L. (2006). A complete guide to native orchids of Australia including the island territories. Frenchs Forest, N.S.W.: New Holland. p. 233. ISBN   1877069124.
  3. Jeanes, Jeff A.; Stajsic, Val. "Thelymitra atronitida". Royal Botanic Gardens Victoria. Retrieved 1 October 2022.
  4. 1 2 Jeanes, Jeffrey A. (2000). "Two new species of Thelymitra (Orchidaceae) from southeastern Australia". Muelleria: An Australian Journal of Botany. 14: 91––97. doi: 10.5962/p.190414 . ISSN   0077-1813. S2CID   90017823.
  5. 1 2 Jeanes, J A (2004). "A revision of the Thelymitra pauciflora R.Br. (Orchidaceae) complex in Australia". Muelleria: An Australian Journal of Botany. 19: 19–79. doi: 10.5962/p.291362 . ISSN   0077-1813. S2CID   251005920.
  6. "Thelymitra atronitida". APNI. Retrieved 11 June 2018.
  7. 1 2 Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press.
  8. 1 2 Jeanes, Jeffrey A. (2000). "Two new species of Thelymitra (Orchidaceae) from southeastern Australia" (PDF). Muelleria. 14: 91–94. doi:10.5962/p.190414. S2CID   90017823 . Retrieved 11 June 2018.
  9. "Black-hooded Sun Orchid - profile". New South Wales Government Office of Environment and Heritage. Retrieved 1 October 2022.
  10. "Thelymitra atronitida blackhood sun-orchid". Tasmanian Government Department of Primary Industries, Parks, Water and the Environment. Retrieved 1 October 2022.