Annuals or perennials, 1-20 cm (caudices slender, woody); herbage lemon-scented or spicy-scented. Stems erect or ascending, glabrous or puberulent. Leaves linear, 10-45 × 1-3 mm, margins with 2-5 pairs of bristles 1-2 mm, faces glabrous (dotted with oil-glands 0.2-0.7 mm). Heads in congested, cymiform arrays. Peduncles 1-20 mm. Involucres narrowly campanulate or cylindric. Phyllaries distinct, linear or narrowly oblanceolate, 2.5-5.5 × 0.5-1 mm (dotted subterminally with 1 or 2 swollen oil-glands and submarginally with 2-5 pairs of smaller oil-glands). Ray florets 8; corollas 3-5(-7) mm (glandular puberulent or nearly glabrous). Disc florets (7-)10-20; corollas 2.5-3.5 mm (sometimes weakly 2-lipped, glandular puberulent). Cypselae 2.5-4 mm, strigillose (hair tips straight, forked); pappi coroniform and/or of 0-7 scabrid awns or bristles 1-2 mm.