Iva L.

Marsh elder (en), Ive (fr)

Genus

Angiosperms > Asterales > Asteraceae

Characteristics

Heads disciform, the pistillate fls few, with tubular or obsolete cor; invol of a few equal or imbricate, ± herbaceous bracts in 1–3 series; receptacle small, chaffy, its bracts commonly linear or spatulate, often subtending the pistillate as well as the staminate fls, these outer pales sometimes larger and more like the bracts of the invol; disk fls 6–20 in our spp., staminate, with undivided style, connate filaments, scarcely united anthers, and abortive or no ovary; achenes obovate, thick but somewhat compressed parallel to the invol bracts; pappus none; herbs or shrubs with opposite (or the upper alternate) lvs and small heads of greenish-white fls sessile or short pedunculate in the axils of the upper lvs or bracts (infl bractless in one sp.). 15, N. Amer.
More
Annual or perennial herbs or shrubs, glandular, aromatic. Leaves opposite or alternate, sessile or subsessile, simple or lobed. Capitula solitary in leaf axils, small, nodding, discoid, heterogamous; involucral bracts 5, uniseriate, free or connate, herbaceous; receptacle convex, paleate. Outer florets few, uniseriate, female, tubular; corolla filiform (sometimes absent); style branches linear, with subulate papillose terminal appendages. Inner florets functionally male (pistil reduced), tubular, campanulate, 5-lobed; anthers free, sagittate at base with short apical appendage; style short, entire. Achenes enclosed in a very loose conceptacle consisting of the fused involucral bracts, obconical to obovoid, ±compressed, glabrous or hairy. Pappus absent.
Life form
Growth form herb
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Sexuality hermaphrodite
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Environment

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Hardiness (USDA) 4-9

Usage

There is some evidence that Iva achenes were an important food source of native peoples in the Mississippi region.
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Edible -
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Cultivation

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Images

Iva unspecified picture

Distribution

Iva world distribution map, present in Australia and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:329306-2
WFO ID wfo-4000019377
COL ID 55X9
BDTFX ID 86613
INPN ID 606919
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Iva

Lower taxons

Iva axillaris Iva imbricata Iva hayesiana Iva asperifolia Iva microcephala Iva cheiranthifolia Iva corbinii Iva texensis Iva frutescens Iva annua