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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.


Annual. Stem: prostrate to erect, branched or not, glabrous. Leaf: opposite, sessile, linear to lanceolate [oblanceolate], with basal ear-like lobes. Inflorescence: axillary 1–5(14)-flowered cymes. Flower: radial, hypanthium bell- to urn-shaped, 4–8-ribbed; sepals 4, epicalyx lobes <= sepals, horn-like, thick; petals (0)4, obovate; stamens 4(5–12), exserted (included); style long, slender [short, stocky]. Fruit: capsule, ± spheric, wall smooth, not striate at 10×, thin, dry, splitting irregularly. Seed: many, ± 1 mm.
± 25 species: temperate, tropics. (Paul Ammann, German botanist, 1634–1691) [Graham et al. 2011 Bot J Linn Soc 166:1–19]
Unabridged etymology: (Paul Ammann, 1634–1691, director of medical garden, University of Leipzig, author of flora of Leipzig area, 1675)

Key to Ammannia

1. Longest peduncles 3–5(9) mm; petals deep rose-purple; fruit 3–5 mm wide ..... A. coccinea

1' Longest peduncles 0–3 mm; petals pale lavender; fruit 4–6 mm wide ..... A. robusta


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [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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