''Pterostylis macilenta'' is a plant in the orchid family

Orchidaceae 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 ...

and is

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 elsew ...

to the

Grampians National Park The Grampians National Park commonly referred to as The Grampians, is a national park located in the Grampians region of Victoria, Australia. The Jardwadjali name for the mountain range itself is Gariwerd. The national park is situated betwee ...

Victoria Victoria most commonly refers to: * Victoria (Australia), a state of the Commonwealth of Australia * Victoria, British Columbia, provincial capital of British Columbia, Canada * Victoria (mythology), Roman goddess of Victory * Victoria, Seychelle ...

. As with similar greenhoods, flowering plants differ from those that are not flowering. The non-flowering plants have a rosette of leaves flat on the ground but the flowering plants have up to six translucent, dark green flowers and lack a rosette.

Description

''Pterostylis macilenta'', 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, aft ...

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 medicinal ...

with an underground tuber. Non-flowering plants have a rosette of between three and six, egg-shaped to lance-shaped leaves, each leaf long and wide. Flowering plants lack a rosette but have up to six flowers on a flowering spike high with five or six linear to narrow lance-shaped stem leaves that are long and wide. The flowers are long and 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 b ...

and

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

s are joined to form a hood called the "galea" over the column. The galea is translucent dark green with darker green stripes. The lateral sepals turn downwards and are long, wide and joined for more than half their length. The labellum is long, about wide and yellowish to brown with a dark stripe along its mid-line. Flowering occurs from September to December.

Taxonomy and naming

This greenhood was first formally described in 2006 by David Jones and given the name ''Bunochilus macilentus''. The description was published in ''Australian Orchid Research'' from a specimen collected on Mount William in the Grampians National Park. In 2007,

Gary Backhouse Gary may refer to: *Gary (given name), a common masculine given name, including a list of people and fictional characters with the name *Gary, Indiana, the largest city named Gary Places ;Iran * Gary, Iran, Sistan and Baluchestan Province ;Uni ...

changed the name to ''Pterostylis macilenta''. 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 ...

(''macilenta'') is derived from a

Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...

word meaning "lean", "thin" or "poor", referring to the narrow labellum.

Distribution and habitat

''Pterostylis macilenta'' is only known from the Grampians National Park where it grows with shrubs in moist forest.

References

{{Taxonbar, from=Q15492801 macilenta Endemic orchids of Australia Orchids of Victoria (Australia) Plants described in 2006