Iva axillaris Pursh

Perennials, 10–40(–60) cm (rhizomatous). Stems erect (usually herbaceous). Leaves: petioles 0–3 mm; blades narrowly ovate or obovate to elliptic or spatulate, 15–25(–45) × 3–8(–15) mm, margins rarely toothed, faces usually ± strigose to scabrellous, gland-dotted. Heads in ± racemiform arrays. Peduncles 1–2 mm. Involucres ± hemispheric, 2–3 mm. Phyllaries: outer 3–5 ± connate, ± herbaceous. Paleae linear, 1.5–2 mm. Pistillate florets 3–5(–8); corollas 0.5–1.5 mm. Functionally staminate florets 4–8(–20+); corollas 2–2.5 mm. Cypselae 2.5–3 mm. 2n = 36, 54.

Dry often alkaline places in plains, valleys and foothills, often on disturbed sites. Seasonally wet, saline habitats at elevations of 10-2500 metres.

Can be grown by seedlings.