''Calochilus psednus'', commonly known as the Cardwell beard orchid, is a species of

orchid Orchids are plants that belong to the family Orchidaceae (), a diverse and widespread group of flowering plants with blooms that are often colourful and fragrant. Along with the Asteraceae, they are one of the two largest families of flowering ...

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found els ...

Queensland ) , nickname = Sunshine State , image_map = Queensland in Australia.svg , map_caption = Location of Queensland in Australia , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , established_ ...

. It has up to three bluish green flowers with reddish brown lines and a labellum with a purplish "beard". The plant is leafless when flowering. It is only known from a small area near

Cardwell Cardwell may refer to: Places Australia *Cardwell, Queensland United States *Cardwell, Missouri *Cardwell, Montana * Cardwell Hall, Kansas State University Canada *Cardwell Parish, New Brunswick People *Alvin B. Cardwell (1902–1992), America ...

Description

''Calochilus psednus'' is a terrestrial,

perennial A perennial plant or simply perennial is a plant that lives more than two years. The term ('' per-'' + '' -ennial'', "through the years") is often used to differentiate a plant from shorter-lived annuals and biennials. The term is also wide ...

deciduous In the fields of horticulture and Botany, the term ''deciduous'' () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, a ...

herb In general use, herbs are a widely distributed and widespread group of plants, excluding vegetables and other plants consumed for macronutrients, with savory or aromatic properties that are used for flavoring and garnishing food, for medicina ...

with an underground

tuber Tubers are a type of enlarged structure used as storage organs for nutrients in some plants. They are used for the plant's perennation (survival of the winter or dry months), to provide energy and nutrients for regrowth during the next growin ...

and a single dark green, grooved leaf long and wide. The leaf is not present during flowering. Up to three bluish green flowers with reddish brown lines, long and wide are borne on a thin, wiry flowering stem tall. The

dorsal Dorsal (from Latin ''dorsum'' ‘back’) may refer to: * Dorsal (anatomy), an anatomical term of location referring to the back or upper side of an organism or parts of an organism * Dorsal, positioned on top of an aircraft's fuselage * Dorsal co ...

sepal A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 The term ''sepalum'' was coined ...

is about long and wide and the

lateral Lateral is a geometric term of location which may refer to: Healthcare *Lateral (anatomy), an anatomical direction * Lateral cricoarytenoid muscle * Lateral release (surgery), a surgical procedure on the side of a kneecap Phonetics *Lateral co ...

sepals are about long and wide. The

petal Petals are modified leaves that surround the reproductive parts of flowers. They are often brightly colored or unusually shaped to attract pollinators. All of the petals of a flower are collectively known as the ''corolla''. Petals are usuall ...

s are about long and wide. The labellum is flat, long and about wide and shiny reddish brown. Most of the labellum has well-spaced, short purple hairs apart from the last quarter which is hairless. The flowers appear from December to February but only last a few hours.

Taxonomy and naming

''Calochilus psednus'' was first formally described in 1989 by David Jones and Bill Lavarack and the description was published in ''

Proceedings of the Royal Society of Queensland ''Proceedings of The Royal Society of Queensland'' is a multidisciplinary scientific journal In academic publishing, a scientific journal is a periodical publication intended to further the progress of science, usually by reporting new re ...

'' from specimens collected south of Cardwell. The

specific epithet In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ...

(''psednus'') is derived from the

Ancient Greek Ancient Greek includes the forms of the Greek language used in ancient Greece and the ancient world from around 1500 BC to 300 BC. It is often roughly divided into the following periods: Mycenaean Greek (), Dark Ages (), the Archaic p ...

word ''psednos'' meaning "thin", "scanty" or "bald".

Distribution and habitat

The Cardwell beard orchid grows in broad-leafed paperbark woodland with dense shrubs and

sedges The Cyperaceae are a family of graminoid (grass-like), monocotyledonous flowering plants known as sedges. The family is large, with some 5,500 known species described in about 90 genera, the largest being the "true sedges" genus ''Carex'' wi ...

and is only known from near the type location.

Conservation

''Calochilus psednus'' is classed as "endangered under the ''

Nature Conservation Act 1992 The ''Nature Conservation Act 1992'' is an act of the Parliament of Queensland, Australia, that, together with subordinate legislation, provides for the legislative protection of Queensland's threatened biota. As originally published, it prov ...

'' and the Australian Government ''

Environment Protection and Biodiversity Conservation Act 1999 The ''Environment Protection and Biodiversity Conservation Act 1999'' (Cth) is an Act of the Parliament of Australia that provides a framework for protection of the Australian environment, including its biodiversity and its natural and cult ...

''. The only threat to this orchid is its very limited distribution, although there are potential threats including changed fire regimes, weed invasion and road maintenance.

References

{{Taxonbar, from=Q15494708 psednus Orchids of Australia Orchids of Queensland Plants described in 1989 Taxa named by David L. Jones (botanist)