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Corolla violet; tube 7–9 mm. long, cylindric, subglabrous to minutely glandular without, throat pilose; limb up to c. 6 mm. in diam.; lobes 2–3.5 x 2–3.5 mm., obovate to subcircular.
Calyx 4.5–5.5 mm. long, scarious, 7–8-nerved, 4-lobed, subglabrous to sparsely minutely glandular; lobes 2.5–3.5 mm. long, subulate, minutely short hispid on margin.
Annual herb, 14–58 cm. tall, erect; stems simple, glabrous, tetragonal, drying pale fawnish-green.
Bracts 2.5–3.5(4) x 1.25–1.75 mm., ovate, long-acuminate, 5-nerved, minutely stipitate-glandular.
Spikes 5–15(40) x c. 7–8 mm., pale yellowish-brown when dry, densely compacted, quadrangular.
Bracteoles 3.5–4.5 x 0.5–1 mm., linear-subulate, scarious, minutely glandular.
Capsule c. 2.5 x 1.5 mm., obovoid, short-beaked.