Jepson eFlora: Taxon page
Key to families | Table of families and genera
Previous taxon Index to 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 |
Next taxon
Heteranthera dubia
WATER STAR-GRASS

Higher Taxonomy
Family: PontederiaceaeView DescriptionDichotomous Key

Common Name: PICKEREL-WEED FAMILY
Habit: 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].
Genera In Family: +- 6 genera, 30 species: most pantropical, some temperate. Note: Some cultivated as orns, some weeds, especially in rice fields. Pontederia cordata L. establishes from garden waste.
eFlora Treatment Author: Charles N. Horn & Elizabeth McClintock
Scientific Editor: Thomas J. Rosatti.
Genus: HeterantheraView DescriptionDichotomous Key

Common Name: MUD PLANTAIN
Habit: 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.
Species In Genus: +- 12 species: tropics, temperate America, Africa. Etymology: (Greek: different, anther, from unequal anthers of most species) Note: 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.

Heteranthera dubia (Jacq.) MacMill.
NATIVE
Habit: 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.
Ecology: Uncommon. Still or moving water; Elevation: < 1500 m. Bioregional Distribution: NCo, ScV, MP; Distribution Outside California: North America. Flowering Time: Jul--Aug Note: Vegetatively +- similar to species of Potamogeton, except leaves lack distinct midrib.
Synonyms: Zosterella dubia (Jacq.) Small
eFlora Treatment Author: Charles N. Horn & Elizabeth McClintock
Jepson Online Interchange

Previous taxon: Heteranthera
Next taxon: Heteranthera limosa

Name Search
botanical illustration including Heteranthera dubia

Contact/Feedback

Citation for this treatment: Charles N. Horn & Elizabeth McClintock 2016. Heteranthera dubia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=28058, accessed on February 14, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 14, 2016.


Geographic subdivisions for Heteranthera dubia:
NCo, ScV, MP;
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
map of distribution 1
(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

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.