White spider orchid

by Michaela Perryman

Title

White spider orchid

Artist

Michaela Perryman

Medium

Photograph - Photography

Description

Caladenia longicauda is a terrestrial, perennial, deciduous, herb with an underground tuber and a single hairy leaf, 100–250 mm (4–10 in) long and 5–20 mm (0.2–0.8 in) wide. Between July and early November it produces one to three (sometimes up to five) flowers on a stalk 170–600 mm (7–20 in) tall, each flower 50–180 mm (2–7 in) wide. The flowers are mostly white except for a few red markings and reddish stripes on the backs of the petals and sepals. The dorsal sepal is green, erect, 30–140 mm (1–6 in) long and 1.5–6 mm (0.06–0.2 in) wide with its edges slightly turned inwards. The lateral sepals are 30–150 mm (1–6 in) long, 2–10 mm (0.08–0.4 in) wide, spreading horizontally near their bases but then drooping. The petals are similar to the sepals but slightly shorter and narrower. The labellum is white, 7–28 mm (0.3–1 in) long, 6–18 mm (0.2–0.7 in) wide with erect to spreading teeth up to 10 mm (0.4 in) long along its sides. The middle part of the labellum has the longest teeth on its edge, the teeth red with hooked white tips. The front part of the labellum curves downwards, with the teeth becoming shorter. There are between four and eight rows of calli along the central part of the labellum, the calli pale to dark red and club-shaped.

Photographed along the Kwinana Wildflower Walk, Western Australia Spring

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3rd Place - Spider Orchid contest - Australian Wildflowers Group - October 2021

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July 12th, 2020

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