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Drakaea gracilis
''Drakaea gracilis'', commonly known as slender hammer orchid is a species of orchid endemic to the south–west of Western Australia. It is pollinated by a single species of male thynnid wasp using sexual deception. The orchid's labellum is similar in shape and scent to a flightless female thynnid wasp. It was first collected in 1900 but other names were given to it, including ''Drakaea elastica'' and ''Drakaea fitzgeraldii''. It was not until 2007 when studies of the drakaeas and their pollinators were carried out, that the present species was recognised as distinct.
== Description ==
''Drakaea gracilis'' is similar to others in the genus in that it has a single, ground hugging leaf and an underground tuber. In this case, the leaf is heart shaped, about in diameter, glabrous, dull blue-grey with darker lines radiating from the attachment to the stem. The stem is long and the stalk of the single flower is long.
The flower is also similar to those of other hammer orchids in that the labellum resembles a flightless female thynnid wasp, except that in this species the column is pointed, the labellum lacks spots and the "neck" of the insect-like labellum is thinner than in other drakaeas. The sepal at the back of the flower is long and the two at the sides are . The petals are also long. The insect-like labellum has a "head" about one-third long as the "body" and which is mostly hairy. The rest of the labellum (representing the female "body" of the insect) is dark maroon in colour and glabrous. Flowers appear from late August to October.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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