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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.

 

TIDESTROMIA
Annual or subshrub, canescent to densely woolly, or glabrous in age; hairs forked. Leaf: generally opposite, occasionally alternate at base, sessile or short-petioled, petiole <= 2.5 mm; blade round to lanceolate, cordate, base wedge-shaped or oblique, tip acute to obtuse, margins entire, papery to fleshy. Inflorescence: axillary head-like cymes, flowers 1–3(5), sessile, ± enclosed by 2 ± opposite leaves hardened and fused in age; bracts, bractlets persistent, ovate, scarious, woolly. Flower: bisexual; perianth parts 5, free, keeled, outer 3 > inner 2, scarious or leathery, glabrous or woolly, tip acute or obtuse; stamens 5, filaments fused at base into short tube, anthers 2-chambered, pseudostaminodes 0 or short, triangular, ± 0.2 mm; ovary ± spheric, ovule 1, style 0 or short, ± 0.1 mm, stigmas 2-lobed, deltoid (irregularly 3-lobed). Fruit: ± spheric, wall membranous. Seed: obovoid, brown-red.
7 species: western North America, West Indies, deserts. (Ivar T. Tidestrom, Swedish-born botanist of southwest United States, 1864–1956)

Key to Tidestromia

1. Annual; buds at stem base 0 ..... T. lanuginosa

1' Subshrub; buds generally present at stem base ..... T. suffruticosa var. oblongifolia

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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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