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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.Key to Heteranthera
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) Fls 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.
Annual, generally emergent or on wet ground ( submersed as seedlings).
Leaf: blade > 4 cm; petiole > 15 cm.
Flower: appearing ± terminal; perianth tube > 1.5 cm; stamens 3, of 2 sizes, shapes, anthers not coiled.
Uncommon. Rice fields; < 100 m. Sacramento Valley;
Previous taxon: Heteranthera dubia
Next taxon: Monochoria
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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|Bioregions in which taxon occurs||Red area (if present) is the part of the bioregion lying between the upper and lower elevation limits of the taxon;|
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.
Chart based on elevation range in Manual and elevations and coordinates of CCH records.
Data provided by the participants of the Consortium of California Herbaria.
Note: About half of the CCH records include both elevation and coordinates.
|Map made in collaboration with Scott Loarie. Data provided by the participants of the Consortium of California Herbaria.
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