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FNA | Family List | FNA Vol. 21 | Asteraceae | Iva

1. Iva frutescens Linnaeus, Sp. Pl. 2: 989. 1753.

Iva frutescens subsp. oraria (Bartlett) R. C. Jackson; I. frutescens var. oraria (Bartlett) Fernald & Griscom

Subshrubs or shrubs, 50–350 cm. Stems erect. Leaves: petioles 5–10+ mm; blades ovate or elliptic to lanceolate, 30–60(–120+) × 5–30(–40) mm, margins usually toothed, faces closely scabrellous, gland-dotted. Heads in ± racemiform arrays. Peduncles 1–3+ mm. Involucres ± hemispheric, 2–4 mm. Phyllaries: outer 5 distinct, ± herbaceous. Paleae linear to subulate, 2.5–3 mm. Pistillate florets (2–)5; corollas 0.7–1 mm. Functionally staminate florets 3–8(–15+); corollas 2–3 mm. Cypselae 2–3 mm. 2n = 34.

Flowering Jul–Oct. Mostly tidelands, brackish to saline marshes, beaches; 0–10 m; N.S.; Ala., Conn., Del., Fla., Ga., La., Maine, Md., Mass., Miss., N.H., N.J., N.Y., N.C., Pa., R.I., S.C., Tex., Va.


 

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