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Iva microcephala
Iva microcephala
Nutt.
Family:
Asteraceae
Small-Head Marsh-Elder
FNA
Resources
John L. Strother in Flora of North America (vol. 21)
Annuals,
10-70(-100) cm.
Stems
erect.
Leaves:
petioles 0-1 mm; blades linear to filiform, 10-35(-60) × 0.6-1.5(-3) mm, margins entire, faces ± scabrellous, gland-dotted.
Heads
in ± spiciform arrays.
Peduncles
0.5-1 mm.
Involucres
hemispheric, 1.5-2 mm.
Phyllaries:
outer 5 distinct, ± herbaceous.
Paleae
cuneiform to setiform, 1-2 mm.
Pistillate florets
2-3+; corollas 0.5-0.8 mm.
Functionally staminate florets
3-5; corollas 1.8-2 mm.
Cypselae
1-1.5 mm.
2
n
= 32.
Flowering Sep-Nov. Disturbed sites, moist or wet soils; 1-100 m; Ala., Fla., Ga., N.C., S.C.
Open Interactive Map
University of Florida Herbarium
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100 Initial Media
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