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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.

 

IVA MARSH-ELDER

Bruce G. Baldwin, adapted from Strother (2006)


[Annual] perennial herb to subshrub [shrub]. Stem: erect to sprawling, often freely branched. Leaf: generally opposite, distal sometimes alternate, petioled or sessile; blades thread-like to (ob)ovate or deltate, generally entire, rarely toothed (in California), ± minutely scabrous [glabrous], gland-dotted (in California). Inflorescence: heads disciform [discoid], ± inverted, in ± raceme-like [spike-like], leafy-bracted cluster; involucre ± hemispheric (in California), 2–10+ mm diam; phyllaries 3–15+ in 1–3+ series, free or ± fused, ± green or inner scarious to membranous; receptacle flat to hemispheric; paleae linear to wedge-shaped, ± membranous, sometimes 0. Pistillate flower: [0]3–8; corolla ± white, inconspicuous, ± tubular. Disk flower: [2]4–20+, staminate; corolla ± white to ± pink, funnel-shaped; anthers free or fused, tip incurved; style tip ± flared, truncate. Fruit: plumply obovate to pear-shaped, often ± compressed, glabrous or minutely scabrous or bristly distally; pappus 0.
± 9 species: North America. (Latin: from mint Ajuga iva (L.) Schreb., with similar odor) [Strother 2006 FNANM 21:25–28] Other taxa in TJM (1993) moved to Euphrosyne.
Unabridged references: [Miao et al. 1995 Amer J Bot 82:919–923]

Key to Iva

1. Outer phyllaries ± fused; stems generally herbaceous ..... I. axillaris

1' Outer phyllaries free; stems generally woody at base ..... I. hayesiana

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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