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Calyx scabrous and with ascending bristles to 1 mm. long outside, almost sericeous inside with ascending bristles 1.5–2.0 mm. long; lobes 3.0–4.5 x 1.0–1.5 mm. when flower newly expanded, increasing to 6.5 x 2.2 mm. in fruit, narrowly triangular to narrowly ovate-lanceolate, acute.
Corolla tube 3.5–4.0 mm. long, widely funnel-shaped, glabrous outside, bristly inside; lobes 14–15 x 2.5–3.0 mm., ovate at base, gradually attenuate into long narrowly triangular apices, roughish outside on back, with some short appressed bristles inside near base.
Stamens inserted near the mouth of the corolla; anthers 5–6 mm. long; terminal appendages 10–11 mm. long; filaments c. 2.5 mm. longwith basal appendage shortly bristly.
Inflorescence a large, narrow, more or less dense terminal panicle, scabrous to bristly, the bristles ascending, to 1 mm. long or little more on pedicels.
An erect perennial herb or undershrub; stems somewhat weak, simple, striated, minutely roughish and with scattered strigae.
Fruit of 1, rarely 2 well developed nutlets 3.0–3.5 mm. in diam., keeled to the apex, rounded at back, minutely verrucose.
Bracts leafy, lanceolate.
Style 17–19 mm. long.
