|University of California, Berkeley|
|Directory News Site Map Home|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Annual, short-lived perennial herb, in or near water; roots fibrous, from taproot or not, generally from lower leaf axils also. Stem: generally soft. Leaf: simple, opposite, ± 4-ranked; stipules scarious. Inflorescence: flowers in upper axils, 1 or few in clusters. Flower: small, inconspicuous, radial, bisexual; sepals, petals 2–5, equal in number, generally free; ovary spheric, styles 3–5, short. Fruit: capsule, septicidal, ± spheric, ovoid, or depressed-ovoid, walls thin; chambers 2–5, each several to many-seeded. Seed: small; surface net-like or glossy.
2 genera, 50 species: ± worldwide. [Yang & Tucker 2007 Fl China 13:55–56] —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Tucker 1986 J Arnold Arbor 67:471–483]
Key to Elatinaceae
Stem: Erect underwater, ± prostrate on wet ground, branched or not; base not woody. Leaf: petiole < 1/3 blade, flat, ± blade-like; blades narrow-elliptic to ± round, ± entire, bases wedge-shaped to ± round, tips round. Inflorescence: flowers 1(2) per node. Flower: sepals, petals wide-elliptic, membranous; sepals pale green; petals pale green-white; stamens (1) 3, 6, 8, filaments 1/2 × to ± equal petals, anthers wide-ovoid; styles 3–4. Fruit: ± spheric or depressed-ovoid; chambers 3–4, each 3–15-seeded; pedicel generally ± 0. Seed: ± visible through fruit wall, elliptic, straight or curved, brown to yellow-brown; surface net-like due to ridges between ± linear rows of pits.Key to Elatine
± 25 species: worldwide. (Greek: fir tree, from a European species that suggests such a plant in miniature) At least 20× magnification needed for pits on seeds.
Stem: decumbent to erect, 1–5 cm. Leaf: oblong, tapered to base; petiole ± 1/2 blade. Inflorescence: flowers 1 per node. Flower: sepals 4, fused in basal ± 1/3, separating in fruit; petals 4, >, wider than sepals; stamens 8. Fruit: chambers 4; pedicel recurved, 2–3 × fruit. Seed: oblong to elliptic, curved 90–180°; pits ± 15 per row, as wide as or wider than long.
Pools, ponds, rice fields, streambanks; 50–1900 m. s High North Coast Ranges (Snow Mtn), Great Central Valley, San Francisco Bay Area; to Washington, Baja California. Mar–Aug [Online Interchange]
Previous taxon: Elatine brachysperma
Next taxon: Elatine chilensis
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Nov 25 2014
Citation for this treatment: [Author of taxon treatment] 2013. Elatine, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=23919, accessed on Nov 25 2014
Copyright © 2014 Regents of the University of California
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.
See CalPhotos for additional images
© 2003 Keir Morse
|Geographic subdivisions indicated for the distribution of Elatine californica|| Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
READ ABOUT YELLOW FLAGS
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).
View elevation by latitude chart
| Data provided by the participants of the Consortium of California Herbaria.
View all CCH records
CCH collections by month