Description
Undershrubs or herbs, erect, 1.5-2 m high; stem and branches acutely 4-angular, scabrid to hispid, or hirsute; nodes annulate; internodes 5-25 cm long, villous on angles. Leaves opposite, sessile, 4-16 x 0.8-2.5 cm, oblong or narrow-lanceolate to ovate-lanceolate, semiamplexicaul at base, coarsely serrate along margins, acute at apex, coriaceous, rugose hirtellous above, spreading-pubescent especially on nerves, scabrous on both surfaces; lateral nerves prominent beneath. Spikes terminal, fasciculate, in triads; primary peduncles 3, ca 6-15 cm long; secondary peduncles 1-1.5 cm long; bracts oblong or lanceolate, acuminate at apex, 8-10 mm long; bractlets linear, 3-6 mm long. Calyx tubular, shortly 5-toothed, ca 4 x 0.3 mm; teeth subequal, ending in long subulate hairy tips; tube green below, pinkish above, glandular-pubescent outside. Corolla hypocrateriform, 5-lobed, purple or bluish pink; lobes subequal, suborbicular or subquadrate, emarginate ca 1.5 x 1 mm; tube narrow, cylindric, ampliate towards apex, ca 8 x 0.2 mm, glandular-pubescent outside. Stamens 4, didynamous; filaments 2-4 mm long; anthers ovoid, basifixed, not appendaged. Ovary oblong, ca 0.4 x 0.2 mm, 4-lobed; style stout, 2.5-3 mm long, glabrous; stigma subcapitate, spurred at base. Schizocarps oblong, ca 3 x 2 mm, splitting into 4 cylindric cocci, 3-gonous, slightly raised-reticulate on dorsal side, brown, enclosed by persistent calyx.
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