Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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Charles E. Turner

Annual, perennial herb from corms, stolons, rhizomes, or tubers, aquatic (± emergent or on mud), generally bisexual; roots fibrous
Stem: caudex short
Leaves: basal, simple, palmately veined, sometimes floating; submersed blades generally linear to ovate; emergent blades linear to sagittate
Inflorescence generally scapose, umbel- to panicle-like; flowers whorled, in interrupted clusters
Flowers bisexual or unisexual, radial; sepals 3, generally green, generally persistent; petals 3, generally > sepals, white or pink; stamens 6–many; pistils 6–many, generally simple
Fruit: achene, generally compressed, beaked
Genera in family: ± 12 genera, 75–100 species: especially n hemisphere
Reference: [Rogers 1983 J Arnold Arbor 64: 383–420]



Annual or short-lived perennial herb; roots not partitioned
Leaf: petiole angled; blade linear to cordate
Inflorescence: peduncle generally smooth; flowers > 3 per node
Flower bisexual; receptacle convex; sepals generally 2–6 mm, dark green; petals generally entire, white; stamens 9–many; pistils many, free, in spheric cluster
Fruit: cluster bur-like; body ± compressed, generally ribbed, tapered to beak
Species in genus: ± 50 species: Am, especially tropics
Etymology: (Greek: spiny, leathery container, from fruit)
Reference: [Haynes & Holm-Nielsen 1986 Brittonia 38:325–332]


E. berteroi (Spreng.) Fassett

Generally annual in CA
Leaves 8–30 cm; blade with transparent lines, coarsely veined; submerged blades linear, wavy; floating and emergent blades 6–14 cm, 3–15 cm wide, elliptic to cordate
Inflorescence generally > leaves; peduncle angled; pedicels < 20 mm, generally ascending
Flower: petals 6–9 mm; stamens ± 12
Fruit: body 1.5–3 mm, ribs generally 5; beak < 2 mm
Chromosomes: 2n=22
Ecology: Ponds, ditches
Elevation: < 300 m.
Bioregional distribution: Inner North Coast Ranges, Great Central Valley, Central Western California, Southwestern California
Distribution outside California: to se US, S.America
Synonyms: var. lanceolatus (Engelm.) Fassett
Horticultural information: TRY.

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bioregional map for ECHINODORUS%20berteroi being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Echinodorus berteroi
Retrieve dichotomous key for Echinodorus
Overlay Consortium of California Herbaria specimen data by county on this map
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