Acianthus ledwardii was a species of flowering plant in the orchid family Orchidaceae and was endemic to Queensland in Australia but is now presumed extinct. It was a terrestrial herb with a single, heart-shaped leaf and between 2 and 6 transparent, reddish brown flowers.
Acianthus ledwardii was a terrestrial, perennial, deciduous, sympodial herb with a single heart-shaped, glabrous, pale green leaf that was reddish-purple on its lower surface. Each plant had between 2 and 6 deep purplish or reddish brown flowers on a thin raceme up to 50 mm (2.0 in) tall. The flowers were similar to those of the more common Acianthus fornicatus, but the dorsal sepal narrowed abruptly rather than gradually tapered, the lateral sepals had three points on the tip, the petals were broader than those of A. fornicatus, and the labellum was convex on the lower surface, rather than concave.[2][3]
Acianthus ledwardii was first formally described in 1938 by Herman Rupp and the description was published in The Queensland Naturalist from specimens collected by "Dr. C.P. Ledward" near Burleigh Heads in 1934.[3][4]
This orchid is only known from collections made in 1934 and 1938 from Burleigh Heads.[2]
Acianthus ledwardii is listed as "extinct" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999.[2]
Acianthus ledwardii was a species of flowering plant in the orchid family Orchidaceae and was endemic to Queensland in Australia but is now presumed extinct. It was a terrestrial herb with a single, heart-shaped leaf and between 2 and 6 transparent, reddish brown flowers.
Acianthus ledwardii é uma espécie de orquídea terrestre pertencente à subtribo Acianthinae, originária do sudeste de Queensland, na Austrália.[1] É planta anual, dotada de raízes compostas quase que exclusivamente por pares de pequenos tubérculos ovoides, com caules curtos e uma única folha basal disposta horizontalmente. A inflorescência comporta pequenas flores terminais ressupinadas de cores discretas, com sépalas e pétalas livres. O labelo é simples e plano, de tamanho muito diferente dos segmentos restantes. A coluna é delicada, sem apêndices acentuados, curvada próximo do ápice, apoda, com antera terminal e quatro polínias amarelas.[2]
Acianthus ledwardii é uma espécie de orquídea terrestre pertencente à subtribo Acianthinae, originária do sudeste de Queensland, na Austrália. É planta anual, dotada de raízes compostas quase que exclusivamente por pares de pequenos tubérculos ovoides, com caules curtos e uma única folha basal disposta horizontalmente. A inflorescência comporta pequenas flores terminais ressupinadas de cores discretas, com sépalas e pétalas livres. O labelo é simples e plano, de tamanho muito diferente dos segmentos restantes. A coluna é delicada, sem apêndices acentuados, curvada próximo do ápice, apoda, com antera terminal e quatro polínias amarelas.
Acianthus ledwardii là một loài thực vật có hoa trong họ Lan. Loài này được Rupp mô tả khoa học đầu tiên năm 1938.[1]
Acianthus ledwardii là một loài thực vật có hoa trong họ Lan. Loài này được Rupp mô tả khoa học đầu tiên năm 1938.
