Caladenia petrensis

Caladenia petrensis A.P.Br. & G.Brockman

Caladenia sp. 'Rothsay'

Rock Spider Orchid

Caladenia filamentosa (Wispy Spider Orchids)

Andrew Brown & Garry Brockman in Nuytsia 17:74-77, Fig.1a (2007)

Canna to Paynes Find, growing in soil pockets on rocky ironstone hills.

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A rock-loving species 150–350 mm high with a hairy leaf 50–120 mm long by 6–10 mm wide and up to two (rarely three) creamy-white or pale yellow flowers 50–60 mm across.

It is distinguished from the related Glistening Spider Orchid (Caladenia incensum) by its generally narrower leaf, smaller, dull, creamy to creamy-yellow flowers with narrower, down-curved to pendulous petals and lateral sepals and smaller labellum. It also inhabits ironstone rather than granitic soils. It is also allied to Banded Ironstone Spider Orchid (C. saxicola) and like that species, inhabits rocky ironstone hills. It differs, however, in having smaller flowers, down-curved to pendulous petals, creamy-white labellum lamina calli, often with pale pink markings, and a more north-westerly distribution.

Not Listed