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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.

 

ROTALA
Annual, perennial herb, glabrous. Stem: spreading to erect, generally branched, 4-angled to rounded. Leaf: opposite, 4-ranked (whorled), generally sessile. Inflorescence: flowers 1 per axil on main shoots and on short axillary shoots, sessile. Flower: radial; hypanthium bell- to ± urn-shaped; sepals generally 4, epicalyx lobes 4 or 0; petals 4, minute, < sepals; stamens generally 4, ± included (exserted). Fruit: capsule, oblong to ± spheric, golden, wall finely transversely striate at 10× thin, dry, valves 2–4. Seed: many, < 1 mm.
± 48 species: temperate, tropics. (Latin: wheel-like) [Baskin et al. 2002 Wetlands (Wilmington) 22:661–668]

Key to Rotala

1. Leaf oblong to obovate or ± round, 0.5–2 cm, paler at margin; epicalyx lobes 0; fruit valves generally 2 ..... R. indica

1' Leaf linear-oblong to elliptic or oblanceolate, 1–5 cm, not paler at margin; epicalyx lobes awl-like, to 2 × > sepals; fruit valves 3–4 ..... R. ramosior

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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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