Difference between revisions of "Iva microcephala"
Trans. Amer. Philos. Soc., n. s. 7: 346. 1840.
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|publication year=1840 | |publication year=1840 | ||
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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 19:48, 24 September 2019
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. 2n = 32.
Phenology: Flowering Sep–Nov.
Habitat: Disturbed sites, moist or wet soils
Elevation: 1–100 m
Distribution
Ala., Fla., Ga., N.C., S.C.
Discussion
Selected References
None.
Lower Taxa
None.