| 词条 | Najas graminea |
| 释义 |
|name = Ricefield water-nymph |image = Najas graminea.JPG |genus = Najas |species = graminea |authority = Del. |synonyms = *Caulinia alagnensis Pollini
|synonyms_ref = [1] }}Najas graminea, also known as ricefield water-nymph[2] is a species of aquatic plant found in freshwater habitats, especially still or slow-moving waters, like ponds and rice fields. It grows to a maximum length of 30 cm. The flowers are monoecious. The flowering season is from July to September.[3][4][5][6] The natural distribution of this annual plant covers most of Africa as well as the Middle East, Central Asia, East Asia, Southeast Asia, New Guinea, New Caledonia and northern Australia. It has become naturalized in Spain, Italy, Bulgaria, Crimea and California.[7] This plant is also commercialized in the aquarium trade. References1. ^The Plant List 2. ^{{Cite web|url=http://www.discoverlife.org/mp/20q?search=Najas+graminea|title=Najas graminea - Ricefield waternymph -- Discover Life|website=www.discoverlife.org|access-date=2017-01-31}} 3. ^{{Cite web|url=http://www.pfaf.org/user/Plant.aspx?LatinName=Najas+graminea|title=Najas graminea Ricefield waternymph PFAF Plant Database|website=www.pfaf.org|access-date=2017-01-31}} 4. ^Alire Raffeneau Delile. 1813. Description de l'Égypte, . . . Histoire Naturelle, Tom. Second 2: 282, pl. 50, f. 3. Najas graminea 5. ^Tzvelev, Nikolai Nikolaievich. 1976. Novosti Sistematiki Vysshikh Rastenii 13: 20, Caulinia graminea 6. ^Triest, Ludwig J. 1988. Mém. Acad. Roy. Sci. Outre-Mer, Sci. Nat. Nouv. Sér. 22(1): 143, Najas graminea var. longidentata 7. ^{{Cite web|url=http://apps.kew.org/wcsp/namedetail.do?name_id=308249|title=World Checklist of Selected Plant Families: Royal Botanic Gardens, Kew|website=apps.kew.org|language=en-GB|access-date=2017-01-31}} External links
8 : Najas|Aquatic plants|Flora of Africa|Flora of temperate Asia|Flora of tropical Asia|Flora of the Northern Territory|Flora of Western Australia|Plants described in 1813 |
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