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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.
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University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
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