Saltmarsh fleabane

Pluchea odorata, commonly known as sweetscent, saltmarsh fleabane or in Latin America as Santa Maria, is an aromatic perennial herb or short-lived subshrub of the family Asteraceae, native to coastal and inland wetlands of the southern United States, Mexico, the Caribbean, Central America and northern South America. The plant typically grows 0.5–1.5 m tall, with erect, much-branched, finely glandular-pubescent stems that exude a pleasant camphor-like fragrance when bruised. The leaves are alternate, elliptic to ovate-lanceolate, 4–12 cm long and 1.5–5 cm wide, with finely toothed margins, sessile or short-petioled, soft and somewhat sticky-pubescent. The inflorescence is a dense, flat-topped to rounded compound corymb of many small heads; each head is 5–8 mm high and contains numerous small pink, mauve or rose-purple disc florets (the outer ones filiform and pistillate, the inner ones tubular and bisexual), with no ray florets. The involucre is campanulate with imbricate, often pinkish bracts. Fruits are small ribbed achenes topped by a single row of capillary pappus bristles. It grows in salt marshes, brackish ditches, river margins and damp disturbed ground.