Shrub to 80 cm tall. Leaves filiform, usually ±sigmoid, 2-8.5 cm long, 0.3-0.7 mm wide, ascending, glabrous, but ciliate towards base; apex mucronate. Inflorescence a narrow, spicate panicle; bracteoles ovate, 2-4 mm long, 0.7-1.8 mm wide, blue, villous at sides and base, with an acute apex. Perianth white, occasionally blue, woolly; tube 2.5-7 mm long; upper lip blue, ovate, 2-3.2 mm long, 0.7-1.8 mm wide, glabrous to velutinous, woolly at base, with an acute apex; lower lip united for 1.5-2.5 mm, pilose; lobes oblong, 0.5-0.8 mm long, 0.15-0.3 mm wide, villous or velutinous, with a ±recurved apex. Nut not seen.
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