|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, perennial herb, submersed, emergent, floating, or on wet ground. Leaf: simple, alternate or whorled, ± in basal rosette or not; blade linear (especially underwater) to round, sometimes sagittate or cordate, base generally sheathing, veins parallel; petiole inflated or not. Inflorescence: raceme, spike, panicle, or 1-flowered, terminal but often appearing ± axillary, subtended by sheathing bract. Flower: bisexual, radial or ± bilateral; perianth lobes 6 (in 2 series) [3,4], petal-like; stamens 3, 6 (in 2 series) [1,4], from various levels on perianth tube, equal or not, sometimes 3 sterile, modified; ovary superior, 1 or 3-chambered. Fruit: many-seeded, loculicidal capsule [1-seeded utricle]. Seed: < 1 cm, longitudinally ribbed [or not].
± 6 genera, 30 species: most pantropical, some temperate. [Horn 2003 FNANM 26:22–45] Some cultivated as orns, some weeds, especially in rice fields. Pontederia cordata L. <Noxious weed> establishes from garden waste. —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Eckenwalder, J.E. and S.C.H. Barrett. 1986. Phylogenetic systematics of Pontederiaceae. Syst. Bot. 11: 373–391.]
Key to Pontederiaceae
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.Key to Heteranthera
± 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.
Perennial herb, generally submersed. Stem: often rooting at nodes. Leaf: > 15 cm. Flower: appearing ± axillary; perianth tube ± 1.5(7) cm; stamens 3, alike, anthers coiled.
Uncommon. Still or moving water; < 1500 m. North Coast, Sacramento Valley, Modoc Plateau; North America. Vegetatively ± similar to species of Potamogeton, except leaves lack distinct midrib. Jul–Aug [Online Interchange]
Previous taxon: Heteranthera
Next taxon: Heteranthera limosa
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Mar 6 2014
Citation for this treatment: [Author of taxon treatment] 2012. Heteranthera, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=28058, accessed on Mar 6 2014
Copyright © 2013 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
© 2008 Louis-M. Landry
|Bioregions in which Heteranthera dubia occurs|| 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
|View elevation by latitude chart|| Data provided by the participants of the Consortium of California Herbaria.
View all CCH records
CCH collections by month