Caladenia nana Endl.

Caladenia nana, commonly known as pink fan orchid,^[2] is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia. It is a clump-forming ground orchid with a single linear leaf and up to 6 pale pink to rose pink flowers.

Description

Caladenia nana is a terrestrial, perennial, deciduous herb that forms clumps. It has a single linear to broadly linear leaf, 50–180 mm (2.0–7.1 in) long and 3–10 mm (0.12–0.39 in) wide with a reddish-purple blotches near the base. Up to 6 pale pink to rose pink flowers 10–40 mm (0.39–1.57 in) 10–40 mm (0.39–1.57 in) wide are borne on a spike 50–400 mm (2.0–15.7 in) tall. The sepals and petals are broadly lance-shaped with glandular hairs on the back. The dorsal sepal is erect and curves forward, 7–17 mm (0.28–0.67 in) long and 2–7 mm (0.079–0.276 in) wide. The lateral sepals are 8–20 mm (0.31–0.79 in) long and 3–7 mm (0.12–0.28 in) wide, the petals 7–17 mm (0.28–0.67 in) long and 3–6 mm (0.12–0.24 in) wide. The labellum is white with pink blotches and markings, and is 5–12 mm (0.20–0.47 in) long 7–12 mm (0.28–0.47 in) wide with three lobes. Flowering occurs from August to November.^[3][4][5]

Taxonomy and naming

Caladenia nana was first formally described in 1846 by Stephan Endlicher in Lehmann's Plantae Preissianae from specimens collected on Mount Clarence in 1840.^[6][7] The specific epithet (nana) means "dwarf".^[3][8]

In 2001, Stephen Hopper and Andrew Phillip Brown described two subspecies of Caladenia nana in the journal Nuytsia and the names are accepted by the Australian Plant Census:

• Caladenia nana R.Br. subsp. nana^[9] - little pink fan orchid, grows to 50–150 mm (2.0–5.9 in) tall and flowers from late August to October, with lateral sepals 8–10 mm (0.31–0.39 in) long and 3–5 mm (0.12–0.20 in) wide.^[5][10]
• Caladenia nana subsp. unita Hopper & A.P.Br. ^[11] - pink fan orchid, grows to 150–400 mm (5.9–15.7 in) tall and flowers from October to November, with lateral sepals 11–19 mm (0.43–0.75 in) long and 5–7 mm (0.20–0.28 in) wide.^[5][12]

Distribution and habitat

Caladenia nana grows in winter-wet flats and swamps in jarrah forest in the Avon Wheatbelt, Esperance Plains, Jarrah Forest, Swan Coastal Plain and Warren bioregions of south-western Western Australia.^[2][3][4]

Conservation

Caladenia nana and both subspecies are classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.^[2][10][12]

References

Caladenia nana é uma espécie de orquídea, família Orchidaceae, endêmica do sudoeste da Austrália,^[1] onde cresce em bosques e florestas claras. São plantas que formam colônias com uma única folha basal pubescente de mede cerca de quinze centímetros de comprimento e uma inflorescência rija, fina e pubescente, com uma ou poucas flores vistosas rosadas. Sua floração costuma ser estimulada por incêndios florestais de verão. Existem duas subespécies cujas diferenças estão no tamanho do agrupamento das colônias e nos calos dolabelo.^[2]

Publicação e sinônimos

• Caladenia nana Endl. in J.G.C.Lehmann, Pl. Preiss. 2: 7 (1846).

Sinônimos homotípicos:

• Caladeniastrum nanum (Endl.) Szlach., Ann. Bot. Fenn. 40: 144 (2003).

Subespécies:

• Caladenia nana subsp. nana
• Caladenia nana subsp. unita (Fitzg.) Hopper & A.P.Br., Nuytsia 14: 181

Sinônimos homotípicos:

• Caladenia unita Fitzg., Gard. Chron., n.s., 1882: 461 (1882).
• Caladeniastrum unitum (Fitzg.) Szlach., Ann. Bot. Fenn. 40: 144 (2003).

Referências

Caladenia nana là một loài thực vật có hoa trong họ Lan. Loài này được Endl. mô tả khoa học đầu tiên năm 1846.^[1]

Chú thích

Liên kết ngoài

• Phương tiện liên quan tới Caladenia nana tại Wikimedia Commons
• Dữ liệu liên quan tới Caladenia nana tại Wikispecies
• Vườn thực vật hoàng gia Kew; Đại học Harvard; Australian Plant Name Index (biên tập). “Caladenia nana”. International Plant Names Index. Truy cập ngày 7 tháng 6 năm 2013.