Bossiaea calcicola

Bossiaea calcicola is a compact, glaucous, spiny shrub that typically grows to a height of up to 0.7 m (2 ft 4 in) with branchlets that are oval to flattened when young. The stems are winged, more or less glabrous with winged cladodes 0.7–8.3 mm (0.028–0.327 in) wide. The leaves are oblong, wedge-shaped to more or less round, 1.5–7.0 mm (0.059–0.276 in) long and 1.1–4.0 mm (0.043–0.157 in) wide. The flowers are arranged singly or in small groups, each flower on a pedicel 4.5–7.2 mm (0.18–0.28 in) long with one or more oblong or egg-shaped bracts 0.6–1.2 mm (0.024–0.047 in) long. The sepals are joined at the base forming a tube 1.7–2.9 mm (0.067–0.114 in) long, the two upper lobes 0.9–1.3 mm (0.035–0.051 in) long and the lower three lobes 0.7–1.2 mm (0.028–0.047 in) long with an oblong bracteole 0.5–1.4 mm (0.020–0.055 in) long near the base. The standard petal is bright yellow with a reddish base around two greenish-yellow "eyes" and 7.4–8.2 mm (0.29–0.32 in) long, the wings 5.9–7.0 mm (0.23–0.28 in) long and pinkish-red, the keel pinkish red and 5.2–5.8 mm (0.20–0.23 in) long. Flowering occurs from July to September and the fruit is a pod 12–22 mm (0.47–0.87 in) long.^[2][3]

Bossiaea calcicola was first formally described in 2006 by James Henderson Ross in the journal Muelleria, from specimens collected near Eagle Gorge in Kalbarri National Park in 1989.^[3][4] The specific epithet (calcicola) means "limestone-dweller", referring to this species' habitat preference.^[3]