Elatine heterandra

• Overview
• Common Names
• Description
• Biology
• Taxonomy
• Similar Species
• More Info
• Further Reading
• Notes

Overview

Vulnerable

Common Names

Description

Family Elatinaceae

Herbs annual , perennial , or subshrubs , semiaquatic or terrestrial , dwarf . Leaves opposite or verticillate , petiolate ; stipules paired ; leaf blade simple , margin entire or serrate. Flowers solitary, clustered, or in axillary cymes, bisexual , actinomorphic , small. Sepals 2-5, imbricate, free or slightly united , thinly membranous or with nearly pellucid margins. Petals 2-5, imbricate in bud, free, membranous. Stamens 1 or 2 × as many as sepals, free; anthers dorsifixed , 2-loculed. Ovary superior, 2-5-loculed, many ovuled; placentation axile ; styles 2-5, free, short; stigmas capitate. Fruit a septicidal capsule, membranous, leathery, or crustaceous . Seeds numerous , straight or curved , small; testa often rugose ; endosperm absent.

Two genera and ca. 50 species: temperate and tropical regions ; two genera and six species in China.[1]

Genus Elatine

Herbs annual , aquatic . Stem prostrate , slender, rooting at nodes. Leaves opposite or verticillate , shortly petiolate ; leaf blade small, margin usually entire. Flowers usually only 1 per node, very small. Sepals 2-4, united at base , membranous, apex subacute . Petals 2-4, longer than sepals, apex obtuse . Stamens 1 or 2 × as many as petals. Ovary globose , compressed , 2-4-loculed, apex truncate ; ovules numerous ; styles 2-4; stigmas capitate. Capsule membranous, 2-4-septicidal. Seeds straight, curved , or horseshoe-shaped, surface reticulate-striate with hexagonal or elliptic pits.

About 25 species: tropical , subtropical , and temperate regions ; three species in China.[2]

Physical Description

Biology

Reproduction

Duration: Annual

Taxonomy

Notes

Name Status: Accepted Name . Latest taxonomic scrutiny: 15-Mar-2000

Similar Species

Members of the genus Elatine

ZipcodeZoo has pages for 80 species, subspecies, varieties, forms, and cultivars in this genus:

E. aestivosa · E. aetolica · E. alata · E. alsinastrum · E. alsiniastrum · E. ambigua (Asian Waterwort) · E. ambiqua · E. americana (Threestamen Waterwort) · E. americana var. australiensis (Waterwort) · E. ammannioides · E. brachysperma (Short-Seeded Water-Wort) · E. brochoni · E. brochonii · E. californica (California Water-Wort) · E. callitrichoides · E. chilensis (Chilean Waterwort) · E. cirrhosa · E. clintoniana · E. conjugata · E. cymbalaria · E. ecuadoriensis · E. fabri · E. fassettiana · E. fauquei · E. fruticosa · E. glaziovii · E. gratioloides (Coldwater) · E. gussonei · E. gyrosperma · E. hardyana · E. hastata · E. heterandra (Mosquito Waterwort) · E. hexandra · E. hippuroidea · E. hungarica · E. hydropiper · E. hydropiper orthosperma · E. inaperta · E. lanigera · E. lindbergii · E. lorentziana · E. macrocalyx · E. macropoda · E. madagascariensis · E. major · E. majuscula · E. microphylla · E. minima (Small Water-Wort) · E. nivalis · E. nodosa · E. ojibwayensis · E. opposita · E. orientalis · E. orthosperma · E. oryzetorum · E. ovata · E. paludosa · E. paramoana · E. pedicellaris · E. perennis · E. peruviana · E. pilosa · E. rubella (Southwestern Waterwort) · E. schkuhriana · E. senegalensis · E. serpillifolium · E. serpyllifolia · E. siphosperma · E. spathulata · E. spuria · E. tenuis · E. tetrandra · E. texana · E. triandra (Threestamen Waterwort) · E. triandra subsp. americana · E. triandra var. haitiensis · E. tripetala · E. verticillaris · E. verticillata · E. williamsii

More Info

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Further Reading

• Zhang Pengyun & Zhang Yaojia. 1990. Elatinaceae. In: Li Hsiwen, ed., Fl. Reipubl. Popularis Sin. 50(2): 132-138.

Notes

Contributors

• Bisby, F.A., Y.R. Roskov, M.A. Ruggiero, T.M. Orrell, L.E. Paglinawan, P.W. Brewer, N. Bailly, J. van Hertum, eds (2007). Species 2000 & ITIS Catalogue of Life: 2007 Annual Checklist. Species 2000: Reading, U.K.
• Global Biodiversity Information Facility. Accessed November 23, 2007. http://www.gbif.org Mediated distribution data from provider.

Data Sources

Accessed through GBIF Data Portal November 23, 2007:

• Berkeley Natural History Museums, University and Jepson Herbaria DiGIR provider

Identifiers

• Biodiversity Heritage Library NamebankID: 2647469
• Catalogue of Life Accepted Name Code: ITS-21410
• Global Biodiversity Information Facility Taxonkey: 13741196
• Globally Unique Identifier: urn:lsid:ipni.org:names:324686-1
• Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 21410
• International Plant Names Index (IPNI) ID: 324686-1
• Natural Heritage Network Species Identifier: PDELT020A0
• U.S.D.A. Plant Symbol: ELHE2
• Zipcode Zoo Species Identifier: 36838

Footnotes

1. Qiner Yang & Gordon C. Tucker "Elatinaceae". in Flora of China Vol. 13 Page 55. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
2. Qiner Yang & Gordon C. Tucker "Elatine". in Flora of China Vol. 13 Page 55, 56. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]

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