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DescriptionRobust erect annual herb, up to 1 m tall. Stems sparsely branched, 4-angled. Leaves subsessile, linear-lanceolate, up to 15 cm long. Flowers in axillary clusters with up to 6 straight spines among the bracts, up to 4 cm long. Corolla 2-lipped, pale blue to mauve with orange-brown raised markings in the white to yellowish centre of the lower lip.