Hypocalymma speciosum

Hypocalymma speciosum is a bushy shrub that typically grows to a height of 25–70 cm (9.8–27.6 in) and often has many stems. Its young stems are 4-angled and glabrous. The leaves are more or less sessile, heart-shaped, egg-shaped or circular, 4–18 mm (0.16–0.71 in) long and 7–15 mm (0.28–0.59 in) wide. The flowers are mostly 10–12 mm (0.39–0.47 in) wide, arranged singly or in groups of up to four, and are more or less sessile. The sepals are broadly elliptic, 2.0–3.8 mm (0.079–0.150 in) long and white with a red tinge. The petals are deep pink-purple, 6–7 mm (0.24–0.28 in) long, and there are 25 to 50 stamens in two rows forming a ring, the longest filaments 3.5–4.5 mm (0.14–0.18 in) long. Flowering occurs from September to December and the fruit is about 3 mm (0.12 in) long.

This species of Hypocalymma grows on rocky slopes in the central and western parts of the Stirling Range, in the Esperance Plains bioregion of southern Western Australia.

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