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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, perennial herb, generally submersed, emergent, or on wet ground. Stem: ± erect, slender, elongate, ± spreading, rooting at nodes or stout. Leaf: alternate, linear, sessile, or ± in basal rosettes, ± ovate [cordate, reniform]; petiole 0 or not inflated, generally > blade. Inflorescence: generally 1-flowered. Flower: ± radial or bilateral; perianth salverform, lobes 6; stamens 3, alike or of 2 sizes, shapes, anthers coiled or not; ovary 1-chambered.
± 12 species: tropics, temperate America, Africa. (Greek: different, anther, from unequal anthers of most species) Flowers developed underwater generally cleistogamous; Heteranthera rotundifolia (Kunth) Griseb. (flowers peduncled; leaves generally not in basal rosette; closely related to Heteranthera limosa) a weed in rice fields in Butte, Yuba cos., possibly elsewhere.

Key to Heteranthera

1. Leaves linear, sessile, alternate; stems slender, ± spreading, generally much-branched, often tangled; flower sessile; perianth yellow ..... H. dubia

1' Leaves ± ovate, petioled, generally ± in basal rosette; stems generally stout, ± erect, often tufted, branched or unbranched, rarely tangled; flower peduncled; perianth white to blue-purple ..... H. limosa


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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