Difference between revisions of "Iva axillaris"
Fl. Amer. Sept. 2: 743. 1813.
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|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae | ||
Revision as of 21:37, 16 December 2019
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.
Phenology: Flowering May–Oct.
Habitat: Seasonally wet, saline habitats
Elevation: 10–2500 m
Distribution
Alta., B.C., Man., Sask., Ariz., Calif., Colo., Idaho, Kans., Minn., Mont., Nebr., Nev., N.Mex., N.Dak., Okla., Oreg., S.Dak., Tex., Utah., Wash., Wis., Wyo.
Discussion
Selected References
None.