Iva angustifolia
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 529. 1836.
Endemic
Synonyms: Iva angustifolia var. latior Shinners Iva texensis
Revision as of 20:12, 5 November 2020 by imported>Volume Importer
Annuals (rarely persisting), 20–60(–100+) cm. Stems usually erect. Leaves: petioles 0–2 mm; blades lance-linear to linear, 12–25(–45) × 1–4(–7+) mm, margins entire, faces scabrellous to hispidulous, gland-dotted. Heads in ± spiciform arrays. Peduncles 0–1 mm. Involucres ± prismatically turbinate, 2.5–3 mm. Phyllaries: outer 3–5 ± connate, ± herbaceous. Paleae linear, 1.5–2 mm. Pistillate florets 0–2+; corollas 0.3–0.8+ mm. Functionally staminate florets 2–5+; corollas 1.5–2 mm. Cypselae 2–3 mm. 2n = 32.
Phenology: Flowering Sep–Nov.
Habitat: Disturbed sites, moist soils
Elevation: 0–300 m
Distribution
Ark., Fla., Kans., La., Okla., Tex.
Discussion
Selected References
None.
Lower Taxa
None.