Perennial herb forming small mats or low cushions, taproot becoming thick and woody, crown often with crowded vegetative buds, these sometimes developing into small crowded leaf rosettes. Stems several from the crown, prostrate or decumbent, simple to well-branched, wiry, mostly 70-300 mm long, exceptionally to c. 450 mm, clad in ± retrorse white hairs, leafy, dwarf axillary shoots often present. Radical leaves, if present, oblong, very short; cauline leaves 10-35 x 0.75-3 mm, more or less spreading, linear, narrowly oblong, or rarely some lower leaves narrowly elliptic, margins entire or with a few small callose teeth, thinly hairy, or hairs very sparse, or wanting. Flowers 1-15, in a short dense spike elongating somewhat in fruit, opening at dusk or in dull light, then sweetly scented. Bracts adnate to calyx for 1.54 mm, unlike the leaves, c. 12-30 mm long, lanceolate, acuminate, margins entire or with an occasional callose tooth, indumentum as on leaves. Calyx 8-12 mm long, lips 24 mm long, hairy on upper margins and sometimes on keels. Corolla tube c. 27-50 mm long, glandular-puberulous, hairs up to 0.2 mm long, limb held horizontally, regular, mouth with circlet of long unicellular hairs sometimes weakly developed on anticous side; lobes (4-)5-8 mm long, deeply notched, crimson and glandular-puberulous outside, white inside, a few minute glandular hairs near the base, or glandular hairs scattered over lower half of each lobe, rarely glands confined to sinuses. Stamens 4, anticous anthers 1.6-2 mm long, shortly exserted, posticous ones 2.5-5 mm long, included. Stigma c. 5-12 mm long, exserted. Capsule c. 10-15 x 3-5 mm. Seeds c. 1 x 1 mm, angled, colliculate, pallid.
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Perennial herb, forming small mats or cushions, often with many vegetative buds on crown, forming small rosettes, up to 300(-450) mm high; stems ± prostrate, wiry. Leaves: radical ones oblong and short; cauline ones narrow, entire or with a few tiny teeth with few hairs or none. Flowers few, up to 15 in a short, crowded spike, lengthening somewhat in fruit. Corolla: tube up to 50 mm long; limb regular; mouth with long hairs all or partway round; lobes deeply notched, glandular inside. Flowering time Aug.-May.
Perennial herb, forming small mats or low cushions. Crown often with crowded vegetative buds. Stems several from crown, with wiry, spreading branching. Cauline leaves spreading, linear or narrowly oblong. Inflorescence few-flowered, a short dense spike. Flowers crimson.