Caladenia lodgeana

Caladenia lodgeana, commonly known as Lodge's spider orchid, is a species of orchid endemic to a restricted area of the south-west of Western Australia. It has a single, hairy leaf and up to three cream, red and pink flowers and a labellum which lacks the red tip common to many other similar caladenias.

Lodge's spider orchid
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Diurideae
Genus: Caladenia
Species:
C. lodgeana
Binomial name
Caladenia lodgeana
Synonyms[1]

Description

Caladenia lodgeana is a terrestrial, perennial, deciduous, herb with an underground tuber and a single erect, hairy leaf, 100–200 mm (4–8 in) long and 5–15 mm (0.2–0.6 in) wide. Up to three cream-coloured, red and pink flowers 100–140 mm (4–6 in) long and 50–100 mm (2–4 in) wide are borne on a stalk 200–400 mm (8–20 in) tall. The sepals and petals have thin brown, club-like glandular tips 5–35 mm (0.2–1 in) long. The dorsal sepal is erect, 50–70 mm (2–3 in) long and 2–3 mm (0.08–0.1 in) wide. The lateral sepals are 55–75 mm (2–3 in) long, 4–6 mm (0.16–0.24 in) wide and spread widely. The petals are 35–65 mm (1–3 in) long and 2–4 mm (0.08–0.2 in) wide and spread widely. The labellum is 18–25 mm (0.7–1 in) long and 11–15 mm (0.4–0.6 in) wide and white or yellowish with the tip rolled under and lacking a red tip. The sides of the labellum have thin teeth up to 8 mm (0.3 in) long and there are four rows of pale red calli up to 1.5 mm (0.06 in) long in the centre. Flowering occurs from late October to early December.[2][3][4]

Taxonomy and naming

Caladenia lodgeana was first described in 2001 by Stephen Hopper and Andrew Phillip Brown from a specimen collected near Margaret River and the description was published in Nuytsia.[1] The specific epithet (lodgeana) honours the Western Australian orchid enthusiast Harry Lodge.[3]

Distribution and habitat

Lodge's spider orchid is only known from the area between Margaret River and Augusta in the Warren biogeographic region where it grows in seasonal swamps.[2][3][4][5]

Conservation

Only about 137 mature plants from two populations of C. lodgeana were known in 2008. The species is classified as "Threatened Flora (Declared Rare Flora — Extant)" by the Western Australian Government Department of Parks and Wildlife[5] and is listed as "Critically Endangered" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999. The main threats to the species are inappropriate fire regimes, weed invasion, four-wheel driving, grazing, trampling, picking and continued drying of wetlands due to water extraction and land clearance.[6]

References
  1. "Caladenia lodgeana". APNI. Retrieved 15 February 2017.
  2. Jones, David L. (2006). A complete guide to native orchids of Australia including the island territories. Frenchs Forest, N.S.W.: New Holland. p. 72. ISBN 1877069124.
  3. Brown, Andrew; Dundas, Pat; Dixon, Kingsley; Hopper, Stephen (2008). Orchids of Western Australia. Crawley, Western Australia: University of Western Australia Press. p. 104. ISBN 9780980296457.
  4. Hoffman, Noel; Brown, Andrew (2011). Orchids of South-West Australia (3rd ed.). Gooseberry Hill: Noel Hoffman. p. 127. ISBN 9780646562322.
  5. "Caladenia lodgeana". FloraBase. Western Australian Government Department of Parks and Wildlife.
  6. "Approved Conservation Advice for Caladenia lodgeana (Lodge's spider-orchid)" (PDF). Australian Government Department of the Environment. Retrieved 15 February 2017.
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