Ruppian.
/ˈrʌpɪə/, U.S. /ˈrəpiə/ A plant of the genus Ruppia, the sole member of the family Ruppiaceae (formerly included in the pondweed family, Potamogetonaceae), comprising plants found in shallow brackish or saline water, having thread-like leaves with small flowers borne on long, frequently coiled stems which float on the surface of the water at maturity, esp. (more fully sea ruppia) the wigeon-grass, R. maritima. Also: the genus itself.Valid publication of the genus name: Linnaeus Species plantarum (1753) I. 127.
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the world > plants > particular plants > plants and herbs > aquatic, marsh, and sea-shore plants > [noun] > other aquatic plants
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1770 C. Milne Bot. Dict. at Inundatæ Adanson pretends, with what foundation I know not, that the flowers in ruppia are likewise male and female upon the same spike.
1793 J. E. Smith Eng. Bot. II. 136 Potamogeton marinum most resembles the Ruppia, but even before flowering it may be distinguished by its leaves, for the most part being not so membranous.
1850 A. Pratt Chapters Common Things Sea-side i. 72 He may chance to meet with that interesting plant, the Sea Ruppia, or Tassel-grass, (Ruppia maritima); flower it can hardly be called, since it has no gay petals to distinguish it.
1885 N.Z. Jrnl Sci. 2 470 In many water plants we find that (as in Ruppia) the flowers are borne up by long stalks until they reach the surface of the water.
1924 Proc. National Acad. Sci. U.S.A. 10 286 The Ruppias at these stations were perennial plants, persisting throughout the year.
1953 Brownsville (Texas) Herald 7 June 9/2 We plan to plant Ruppia, commonly known as widgeon-grass.
2005 A. Brearley E. Hodgkin's Swanland viii. 390 Ruppia is also eaten by fish such as mullet and bream.
This is a new entry (OED Third Edition, March 2011; most recently modified version published online March 2022).
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