Large, lax herbs often growing in large groups. Stems more or less ascendent, up to 30 cm high, with few branches and lower leaves already withered at flowering time, appressed antrorse strigose. Leaves spathulate, spathulate-oblong to oblong, petioles 0.5-1.2 cm long, blade 1.5-4.5 by 0.4-0.7 cm, obliquely truncate at base, rounded or retuse at apex, with 3 nerves on either side of midrib and 2 basal ones, sparsely antrorse strigose in distal part above, with only few hairs, more numerous only along midrib below. Flowers solitary in axils of upper leaves. Calyx 5-6 mm long, lobes 4-6 by 1-1.5 mm, narrowly lanceolate to elliptic, acute, with a black gland below apex, antrorse strigose along midrib and margins. Corolla pink or blue, throat white, or entirely white, or white with blue tips, up to 9 mm long, 12 mm diam., tube 4-6 mm long, lobes broadly spathulate-obovate, 4-6 mm wide, papillate on the inner side; fornices kidney-shaped, 0.5-1 mm wide, ciliolate. Stamens c. 1 mm long, the anthers 0.8 mm long. Pistil: style 1-1.5 mm long. Nutlets angulate-ovoid, c. 1 mm long, dorsally rounded, with sharp angles, dull grey, finely papillate.
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