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.
2
n
= 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.
