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Annual or perennial herbs, 40–50 cm. tall, erect; stems simple or branched from middle or above, terete, subglabrous to minutely, finely appressed, antrorse hispid-pubescent, sometimes scabrid.
Inflorescence of long, slender, laxly-flowered spikes 7–25 cm. long; flowers shortly pedicellate on pedicels 0.5–1 mm. long, almost opposite above, alternate below.
Calyx 4.5–6.5 mm. long, 5-lobed, 10-nerved, sparsely short hispid-strigose on nerves and lobes; lobes 1–1.5 mm. long, narrowly-to linear-triangular, acute.
Corolla pink, purplish-blue to white; tube 5.5–6.5 mm. long, glabrous; limb up to 5.5 mm. in diam.; 1.5–3 x 0.5–2 mm., obovate.
Bracts 2.5–3 x c. 1 mm., ovate to ovate-lanceolate, concave, acute to acuminate, sparsely hairy to glabrous except on margin.
Bracteoles 1.5–3 x 0.3–0.75 mm., linear to linear-lanceolate, indumentum as for bracts.
Capsule 4.5–6 x 1.75 mm., broad, narrowly oblong in outline, shortly apiculate.
From a rosette of leaves, leaf-veins sometimes tinged purple beneath
Erect slender-branched herb, stem 1-2 ft. high
Flowers mauve or occasionally white
Drying black.
