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Najas graminea Delile
Ricefield Water-Nymph

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Following modified from Flora of Taiwan, National Taiwan University
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Following modified from Taiwan Biodiversity National Information Network
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Kingdom Plantae  
 Phylum Tracheophyta  
 Class Magnoliopsida  
 Order Alismatales  
 Family Hydrocharitaceae  
 Genus Najas  
  Najas graminea    Delile 
Provider: Ching-I Peng 
hierarchy tree    download xml    download txt    Chinese Page    
Synonyms: Caulinia graminea Najas graminea delilei   details
Citation: Flora of Taiwan 2nd ed. 5: 33, 2000
Name Code: 201874
Suggested Link    Discover Life    Flora of Taiwan 2nd eBooks (National Taiwan University)  
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Following modified from Plants Database, United States Department of Agriculture
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http://plants.usda.gov/java/profile?symbol=NAGR2 ---> https://plants.usda.gov/java/profile?symbol=NAGR2
https://plants.usda.gov/java/profile?symbol=NAGR2 ---> http://plants.usda.gov/core/profile?symbol=NAGR2
http://plants.usda.gov/core/profile?symbol=NAGR2 ---> https://plants.usda.gov/core/profile?symbol=NAGR2
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Najas graminea Delile
ricefield waternymph

General Information
Symbol: NAGR2
Group: Monocot
Family: Najadaceae
Duration: Annual
Growth Habit : Forb/herb
Native Status : L48   I
Data Source and Documentation
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Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   




Symbol Scientific Name
CAGR18 Caulinia graminea (Delile) Tzvelev


Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Liliopsida – Monocotyledons
Subclass Alismatidae
Order Najadales
Family Najadaceae – Water-nymph family
Genus Najas L. – waternymph
Species Najas graminea Delile – ricefield waternymph

Subordinate Taxa

This plant has no children

Legal Status

Wetland Status

Interpreting Wetland Status

North America
Arid West OBL
Western Mountains, Valleys, and Coast OBL

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Source Large Mammals Small Mammals Water Birds Terrestrial Birds


Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover

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Following modified from Flora of North America
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FNA | Family List | FNA Vol. 22 | Najadaceae | Najas

4. Najas graminea Delile, Description de l'Egypte ... Histoire Naturelle. 282, plate 50, fig. 3. 1813.

Stems sparingly branched distally, to 35 cm ´ 0.2--0.5 mm; internodes 0.4--1.9 cm, without prickles. Leaves spreading to ascending with age, 0.8--2 cm, lax in age; sheath 1--1.5 mm wide, apex deeply auriculate; blade 0.5--1 mm wide, margins minutely serrulate, teeth 40 per side, apex acute with 2--3 teeth, teeth unicellular; midvein without prickles abaxially. Flowers 1--2 per axil, staminate and pistillate on same plants. Staminate flowers in distal axils, 2--3 mm; involucre beaks 4-lobed, 1--1.5 mm; anther 4-loculed, 1.5 mm. Pistillate flowers distal to proximal, to 3.5 mm; styles to 1 mm; stigmas 2-lobed. Seeds not recurved, greenish brown, fusiform, 1.7--2.5 ´ 0.4--6 mm, apex with style situated at center; testa dull, 3 cell layers thick, pitted; aeroleareoles regularly arranged in 35 longitudinal rows, not ladderlike, 4-angled, as long aser than broad, end walls slightly raised. 2n = 24, 36, 48 (Asia).

Flowering summer. Rice fields; 200 m; introduced; Calif.; Eurasia; Africa; Australia.

Because of the deeply auriculate sheaths, Najas graminea is one of the easiest of the North American and Central American Najas to recognize. Najas graminea often becomes weedy in rice fields of southeast Asia.

Updated: 2018-11-15 04:55:02 gmt
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