''Corybas cerasinus'', commonly known as the red helmet orchid, is a

species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...

of terrestrial

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 ...

tropical north Queensland Far North Queensland (FNQ) is the northernmost part of the Australian state of Queensland. Its largest city is Cairns and it is dominated geographically by Cape York Peninsula, which stretches north to the Torres Strait, and west to the Gulf Co ...

. It has a single bluish green, heart-shaped leaf and a cherry red to dark maroon flower with its curved

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 ...

obscuring its labellum which has an upturned tip.

Description

''Corybas cerasinus'' is a

terrestrial Terrestrial refers to things related to land or the planet Earth. Terrestrial may also refer to: * Terrestrial animal, an animal that lives on land opposed to living in water, or sometimes an animal that lives on or near the ground, as opposed to ...

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 a single heart-shaped leaf long and wide, lying flat on the ground. The leaf is bluish green on the upper surface and purplish on the lower side. There is a single erect, cherry red to dark maroon flower long and wide. The largest part of the flower is the dorsal sepal which is egg-shaped to oblong when flattened, 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, about long and 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. The labellum is mostly hidden by the dorsal sepal but has edges which turn upwards and a few tiny bristles. Flowering occurs from June to August.

Taxonomy

''Corybas cerasinus'' was first formally described in 2001 by David Jones and

Bruce Gray Bruce Gray (September 7, 1936 – December 13, 2017) was a Canadian actor, known for multiple roles in films and television shows for over 5 decades. Early Years Gray was born in Puerto Rico and lived in Toronto after 1949. He graduated from ...

from a specimen collected on

Mount Walker Mount Walker () is a snow-covered mountain which rises from the northeast part of Forbidden Plateau, 2 nautical miles (3.7 km) south of the head of Blanchard Glacier, in northern Graham Land, Antarctica. It was surveyed by Falkland Islands ...

and the description was published in ''The Orchadian''. 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 ...

(''cerasinus'') 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 "cherry-coloured".

Distribution and habitat

The red helmet orchid grows in forest in colonies with often only a few plants in flower. It is found between

Cooktown Cooktown is a coastal town and locality in the Shire of Cook, Queensland, Australia. Cooktown is at the mouth of the Endeavour River, on Cape York Peninsula in Far North Queensland where James Cook beached his ship, the Endeavour, for repai ...

and the

Herbert River The Herbert River is a river located in Far North Queensland, Australia. The southernmost of Queensland's wet tropics river systems, it was named in 1864 by George Elphinstone Dalrymple explorer, after Robert George Wyndham Herbert, the fi ...

and also on

Dunk Island Dunk Island, known as ''Coonanglebah'' in the Warrgamay and Dyirbal languages, is an island within the locality of Dunk in the Cassowary Coast Region, Queensland, Australia. It lies off the Australian east coast, opposite the town of Missi ...

References

{{Taxonbar, from=Q10261014 cerasinus Endemic orchids of Australia Orchids of Queensland Plants described in 2001