Habit : Perennial herbs with 15-60 cm high, tap root, stems simple or branched from the base, glabrous, often purplish, branches flattened, curving upwards, minutely winged when young.
Leaves : Linear or linear-oblong, obtuse and apiculate at apex, rounded or tapering at base, entire and thickened along the margins, dark-green, glabrous, petioles very short, articulated to stem, stipules peltate, subsagittate, scarious.
