''Chiloglottis sphaerula'' 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 ...

to a small part of

New South Wales ) , nickname = , image_map = New South Wales in Australia.svg , map_caption = Location of New South Wales in AustraliaCoordinates: , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , es ...

. It has two dark green leaves and a single green to reddish pink flower with a shiny black insect-like

callus A callus is an area of thickened and sometimes hardened skin that forms as a response to repeated friction, pressure, or other irritation. Since repeated contact is required, calluses are most often found on the feet and hands, but they may o ...

covering two-thirds of the base of the labellum but with the tip of the labellum free of callus.

Description

''Chiloglottis sphaerula'' 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 two egg-shaped leaves long and wide on a petiole long. A single green to reddish pink flower long is borne on a flowering stem high. 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 ...

spatula A spatula is a broad, flat, flexible blade used to mix, spread and lift material including foods, drugs, plaster and paints. In medical applications, "spatula" may also be used synonymously with tongue depressor. The word ''spatula'' derives ...

-shaped, to egg-shaped with the narrower end towards the base, long and wide. 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 linear, long, about wide, erect near their bases but turn downwards and away from each other. There is a

glandular In animals, a gland is a group of cells in an animal's body that synthesizes substances (such as hormones) for release into the bloodstream (endocrine gland) or into cavities inside the body or its outer surface (exocrine gland). Structure De ...

tip about long on the end of the dorsal sepal and long on the lateral sepals. 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 narrow egg-shaped with the narrower end towards the base, long, about wide and turn downwards near the

ovary The ovary is an organ in the female reproductive system that produces an ovum. When released, this travels down the fallopian tube into the uterus, where it may become fertilized by a sperm. There is an ovary () found on each side of the bod ...

. The labellum is wedge-shaped to

trowel A trowel is a small hand tool used for digging, applying, smoothing, or moving small amounts of viscous or particulate material. Common varieties include the masonry trowel, garden trowel, and float trowel. A power trowel is a much larger ...

-shaped, long and about wide. There is a shiny black, insect-like callus about long and wide, occupying two-thirds of the labellum base. The large callus is surrounded by many dark reddish, club-shaped calli up to long and by smaller calli near its base. The remaining one-third of the tip of the labellum is devoid of calli. The

column A column or pillar in architecture and structural engineering is a structural element that transmits, through compression, the weight of the structure above to other structural elements below. In other words, a column is a compression member ...

is pale green with reddish flecks, long and about wide with narrow wings. Flowering occurs from December to February.

Taxonomy

''Chiloglottis sphaerula'' was first formally described in 2006 by David Jones from a specimen collected in the

Barrington Tops National Park The Barrington Tops National Park is a protected national park located in the Hunter Valley in New South Wales, Australia. Gazetted in 1969, the park is situated between Scone, Singleton, Dungog, Gloucester and East Gresford. The park is par ...

and the description was published in ''Australian Orchid Research''. 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 ...

(''sphaerula'') is 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 ...

word meaning "ball" referring to the shape of the "head" of the insect-like callus. This species was formerly known as ''Chiloglottis'' sp. aff. ''sphyrnoides'' (Northern Tablelands).

Distribution and habitat

This orchid grows in tall, moist forest on the southern part of the

Northern Tablelands The Northern Tablelands, also known as the New England Tableland, is a plateau and a region of the Great Dividing Range in northern New South Wales, Australia. It includes the New England Range, the narrow highlands area of the New England reg ...

and Barrington Tops National Park.

References

External links

* {{Taxonbar, from=Q15495790 sphaerula Orchids of New South Wales Plants described in 2006