Tan leek orchid | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Monocots |
Order: | Asparagales |
Family: | Orchidaceae |
Subfamily: | Orchidoideae |
Tribe: | Diurideae |
Genus: | Prasophyllum |
Species: | P. erythrocommum |
Binomial name | |
Prasophyllum erythrocommum | |
Prasophyllum erythrocommum is a species of orchid endemic to Victoria. It has a single tubular green leaf and up to thirty small, greenish brown to dark brown flowers. It is a very rare orchid, only known from a small area north of Melbourne.
Prasophyllum erythrocommum is a terrestrial, perennial, deciduous, herb with an underground tuber and which only occurs as solitary individuals. It has a single tube-shaped leaf up to 100 mm (4 in) long and 3–4 mm (0.1–0.2 in) wide at the base. Between ten and thirty scented flowers are loosely arranged along a slender flowering stem 50–100 mm (2–4 in) long. The flowers are greenish brown to dark brown. 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 egg-shaped to lance-shaped, 4.5–6 mm (0.18–0.24 in) long and turns downwards. The lateral sepals are linear to lance-shaped, 4.5–6 mm (0.18–0.24 in) long, parallel to and free from each other. The petals are lance-shaped to oblong and 4–5.5 mm (0.16–0.22 in) long. The labellum is lance-shaped to egg-shaped, greenish to pinkish, dished and 4–5 mm (0.16–0.20 in) long. It is turns upward, although less sharply than in most similar members of the genus. There is a fleshy, dull greenish smooth callus in the centre of the labellum. Flowering occurs from October to November. [2]
Prasophyllum erythrocommum was first formally described in 2006 by David Jones and Dean Rouse. The description was published in Australian Orchid Research from a specimen collected from near the Yan Yean Reservoir. [3] The specific epithet (erythrocommum) is derived from the Ancient Greek words erythros meaning "red", [4] : 308 and kommi meaning "gum" or "resin", an oblique reference to the red gum habitat of this species. [5]
The tan leek orchid is only known from the type location where it grows in an open, grassy flat. [2]
Prasophyllum erythrocommum is listed as "Critically Endangered" under the Victorian Flora and Fauna Guarantee Act 1988. It occurs in an area which has been subjected to extensive land clearing. [2]
Prasophyllum alpinum, commonly known as the alpine leek orchid, is a species of orchid endemic to Tasmania. It was formerly described as occurring in mainland Australia but has smaller flowers than the species occurring there. It has a single, tube-shaped leaf and up to fourteen green to greenish-brown flowers and grows in subalpine areas.
Prasophyllum anticum, commonly known as the Pretty Hill leek orchid, is a species of orchid endemic to Victoria. It has a single tubular, dark green leaf and between ten and twenty five scented, greenish-brown flowers and is only known from a small area in the south-west of the state.
Prasophyllum brevilabre, commonly known as the short-lip leek orchid, is a species of orchid endemic to south-eastern Australia. It has a single tubular, green leaf and up to thirty small, greenish-brown flowers with a white labellum. The labellum is sharply turned back on itself so that its tip almost reaches its base.
Prasophyllum montanum, commonly known as the mountain leek orchid, is a species of orchid endemic to eastern Australia. It has a single tubular, green leaf and up to fifty scented, greenish to pinkish flowers. It grows in montane ecosystems at altitudes above 1,500 m (5,000 ft).
Prasophyllum campestre, commonly known as the sandplain leek orchid, or inland leek orchid, is a species of orchid endemic to eastern Australia. It has a single tubular, yellowish-green leaf and up to twenty greenish, strongly scented flowers with red, purplish, brown or white marks. It grows in the drier parts of Queensland, New South Wales and Victoria.
Prasophyllum dossenum is a species of orchid endemic to a small area of northern New South Wales. It has a single tubular, dark green leaf and up to thirty scented pinkish-white and greenish-brown flowers crowded along an erect flowering stem. It is a rare orchid which grows in grassy places on the Northern Tablelands of New South Wales.
Prasophyllum gilgai, commonly known as the gilgai leek orchid, is a species of orchid endemic to Victoria. It has a single tubular green leaf and up to twenty greenish brown, light brown, pink or white flowers. It is a very rare orchid with a population of fewer than fifty plants in a small area in the north of the state.
Prasophyllum hygrophilum, commonly known as the swamp leek orchid, is a species of orchid endemic to Victoria. It has a single tubular green leaf and up to thirty greenish brown, pink or mauve flowers. It is a rare orchid only known from two populations and is classified as "endangered" in Victoria.
Prasophyllum incompositum is a species of orchid endemic to Queensland. It has a single tubular, dark green leaf and up to thirty scented, greenish-brown and white flowers. It has only been recorded from the Carnarvon National Park.
Prasophyllum occultans, commonly known as the hidden leek orchid, is a species of orchid endemic to southern Australia. It has a single, smooth, tube-shaped leaf with a reddish-purple base and up to ten greenish flowers. It is a rare species found only in a few locations in South Australia and in far western Victoria.
Prasophyllum patens, commonly known as the broad-lipped leek orchid or sandstone leek orchid, is a species of orchid endemic to the Sydney region of New South Wales. It has a single tubular green leaf and up to thirty green to greenish-brown, lemon-scented flowers with a white labellum.
Prasophyllum subbisectum, commonly known as the Pomonal leek orchid, is a species of orchid endemic to Victoria. It has a single, thin tubular leaf and up to fifteen small, greenish-brown to brown flowers well-spaced along a thin flowering stem. It is only known from a small area around Stawell.
Prasophyllum viretrum is a species of orchid endemic to Victoria. It has a single tubular, dark green leaf and up to thirty five scented, greenish-brown to brownish flowers and is only known from a few small populations in south-western Victoria.
Prasophyllum roseum, commonly known as the pink lip leek orchid, is a species of orchid endemic to southern continental Australia. It has a single tube-shaped leaf and up to thirty greenish flowers with a pink labellum. It is a recently described plant, previously included with P. fitzgeraldii, but distinguished from that species by its smaller, less crowded flowers, with more spreading lateral sepals and different labellum callus. It grows in the south-east of South Australia and in western Victoria.
Prasophyllum spadiceum, commonly known as the brown lip leek orchid, is a species of orchid endemic to southern continental Australia. It has a single tube-shaped leaf and up to thirty pale green, brown and white flowers with a whitish labellum. It is a recently described plant, previously included with P. fitzgeraldii, but distinguished from that species by its smaller, paler flowers, whitish labellum and brown callus. It grows in the south-east of South Australia and in a single location in western Victoria.
Prasophyllum crassum is a species of orchid endemic to South Australia. It has a single tube-shaped leaf and up to fifteen greenish and pinkish-brown flowers with a whitish labellum. It is a recently described plant, previously included with P. fitzgeraldii, but distinguished from that species by its smaller number of smaller, less colourful flowers and different labellum shape. It grows in the south-east of the state and usually only appears after fire.
Prasophyllum stygium, commonly known as the elfin leek orchid, is a species of orchid endemic to Victoria. It has a single tube-shaped leaf and up to twenty greenish-brown flowers with a white labellum. It is a recently described plant, previously included with P. fitzgeraldii, but distinguished from that species by its greenish-brown flowers with their white labellum and narrower brown callus. It is only known from a single population of about thirty plants.
Prasophyllum collinum is a species of orchid endemic to South Australia. It has a single tubular leaf and up to thirty lemon-scented, greenish brown and white flowers. It is only known from the Eyre Peninsula where it grows in sparse woodland.
Prasophyllum praecox, commonly known as the early leek orchid, is a species of orchid endemic to South Australia. It has a single tubular leaf and up to ten green to greenish brown and white flowers and is found in the southern parts of the Yorke Peninsula in South Australia.
Prasophyllum pilligaense is a species of orchid endemic to New South Wales. It has a single tubular, shiny dark green leaf and up to thirty scented greenish brown to brownish and white flowers. It is only known from a few populations in the Coonabarabran district.