Caladenia bartlettii

Caladenia bartlettii is a plant in the orchid family Orchidaceae and is endemic to New Zealand. It is a ground orchid with a single narrow, hairy leaf and a thin wiry stem usually bearing one short-lived mauve to pink flower.

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

Petalochilus bartlettii (Hatch) D.L.Jones & M.A.Clem.

Description

Caladenia bartlettii is a terrestrial, perennial, deciduous, herb, sometimes solitary or in groups of up to ten individuals. It has an underground tuber and a single hairy, narrow linear leaf up to 10 cm (4 in) long, 2 mm (0.08 in) wide and dark purplish or reddish-green.[2]

One, sometimes two flowers up to 20 mm (0.8 in) in diameter are borne on a thin, sparsely hairy, wiry spike, 30 cm (10 in) high. The sepals and petals are a dark magenta colour shading to white in the lower parts. The dorsal sepal is erect and the lateral sepals are elliptic in shape with a rounded end and are slightly larger than the petals. The labellum has three lobes with red stripes, the mid-lobe triangular in shape, curled under and dark yellow with a wavy edge. There are two rows of bright yellow-tipped calli along the mid-line of the labellum. Flowering occurs from October to December but the flowers are self-pollinating and only last for a few days.[2][3]

Taxonomy and naming

The species was first formally described in 1949 by Edwin Hatch as a variety of Caladenia carnea and the description was published in Transactions and Proceedings of the Royal Society of New Zealand.[4] The name was changed to Caladenia bartlettii in 1997.[1] The specific epithet (bartlettii) honours Francis (Frank) William Bartlett (1896-1979) of Silverdale, "whose knowledge of the gumlands flora has made his home the mecca of Auckland enthusiasts for many years".[5]

Distribution and habitat

This caladenia grows in shady places in poor soil, always in forests dominated by kauri trees. It is found on both the North and South Island of New Zealand.[2][3][6]

Conservation

Caladenia bartlettii was classified in 2012 as "At Risk - Naturally Uncommon".[2]

References
  1. "Caladenia bartlettii". APNI. Retrieved 11 October 2016.
  2. de Lange, Peter James. "Caladenia bartlettii". New Zealand Plant Conservation Network. Retrieved 11 October 2016.
  3. Pridgeon (ed.), Alec M.; Cribb (ed.), Phillip J.; Chase (ed.), Mark W.; Rasmussen (ed.), Finn (2001). Genera Orchidacearum, Volume 2, Orchidoideae (part 1). Oxford, England: Oxford University Press. pp. 94–95. ISBN 0198507100.CS1 maint: extra text: authors list (link)
  4. "Caladenia carnea var. bartlettii". APNI. Retrieved 11 October 2016.
  5. Godley, E.J. (1995). "Biographical Notes (18): Francis William Bartlett (1896-1979)". New Zealand Botanical Society Newsletter. 40: 14–16.
  6. "Caladenia bartlettii". New Zealand native orchids. Retrieved 10 October 2016.
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