Herbs, perennial, procumbent and ascending, caespitose, (5-)10-20(-40) cm tall. Stems with 4 prominent whitish angles, variable from ± densely hispid with straight trichomes of ca. 0.8 mm to retrorsely (very rarely also antrorsely) aculeolate. Middle stem leaves in whorls of up to 5 or 6 (never only 4), subsessile; blade drying blackish, narrowly oblanceolate to narrowly lanceolate, (3-)5-10(-17) × 0.8-2(-4.2) mm, hispid, retrorsely aculeolate on midrib and margins or glabrescent, base cuneate, apex acute and shortly mucronate; vein 1, whitish. Inflorescences with axillary and/or terminal cymes, few to several flowered; peduncles divaricate, with leaflike bracts, 1-3 mm; pedicels 0.5-3 mm. Ovary ovoid, ca. 0.6 mm, densely hispidulous, glabrescent or glabrous. Corolla purple, yellowish green, or white, rotate, 2.5-3 mm in diam., glabrous or scaberulous inside; lobes 4, ovate, acute. Fruit subglobose, ca. 2 mm in diam., with dense to sparse ± uncinate trichomes 0.5-0.7 mm or glabrous and smooth. Fl. and fr. May-Aug.
Home