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Widgeongrass (Ruppia maritima)

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Ruppia Maritima, or more commonly know as Widgeongrass, is a forb/herb (a forb/herb is a non-woody plant that is not a grass) with green foliage and green flowers of the genus Ruppia. It has a rapid growth rate and a height of 0.2 feet at maturity. Its duration is perennial which means it will grow year after year. It's active growth period is spring and summer, blooms during mid spring, is intolerant of shade and is routinely available commercially. Ruppia Maritima or Widgeongrass's floral region is North America US Lower 48, Alaska, Hawaii, Puerto Rico and The Virgin Islands, specifically in the states of Alaska, Alabama, California, Connecticut, Delaware, Florida, Georgia, Hawaii, Louisiana, Massachusetts, Maryland, Maine, Mississippi, North Carolina, New Hampshire, New Jersey, New York, Oregon, Rhode Island, South Carolina, Texas, Virginia, Vermont and Washington.

  • Category: Monocot
  • Genus: Ruppia
  • Family: Ruppiaceae
  • Order: Najadales
  • Class: Liliopsida
  • Division: Magnoliophyta
  • Duration: Perennial
  • Growth Habit: Forb/herb
  • Native Status: L48 (N) AK (N) HI (N) PR (N) VI (N) CAN (N) SPM (N)
  • State T/E Status: MI (T)
  • State T/E Common Name: MI (widgeon-grass)
  • National Wetland Indicator Status: OBL
  • Regional Wetland Indicator Status: 1(OBL) 2(OBL) 3(OBL) 4(OBL) 5(OBL) 6(OBL) 7(OBL) 8(OBL) 9(OBL) 0(OBL) A(OBL) C(OBL) H(OBL)
  • Active Growth Period: Spring and Summer
  • After Harvest Regrowth Rate: None
  • Allelopath: No
  • Bloat: None
  • C:N Ratio: Low
  • Coppice Potential: No
  • Fall Conspicuous: No
  • Fire Resistance: No
  • Flower Color: Green
  • Flower Conspicuous: No
  • Foliage Color: Green
  • Foliage Porosity Summer: Porous
  • Foliage Porosity Winter: Porous
  • Foliage Texture: Fine
  • Fruit/Seed Color: Brown
  • Fruit/Seed Conspicuous: No
  • Growth Form: Rhizomatous
  • Growth Rate: Rapid
  • Height Mature (feet): 0.2
  • Leaf Retention: No
  • Lifespan: Short
  • Low Growing Grass: No
  • Resprout Ability: No
  • Shape and Orientation: Decumbent
  • Toxicity: None
  • Adapted to Coarse Textured Soils: No
  • Adapted to Fine Textured Soils: Yes
  • Adapted to Medium Textured Soils: Yes
  • Anaerobic Tolerance: High
  • CaCO3 Tolerance: Medium
  • Cold Stratification Required: No
  • Drought Tolerance: None
  • Fertility Requirement: Low
  • Fire Tolerance: High
  • Hedge Tolerance: None
  • Moisture Use: High
  • pH (Minimum): 5.4
  • pH (Maximum): 8.5
  • Planting Density per Acre Minimum: 1700
  • Planting Density per Acre Maximum: 2700
  • Root Depth Minimum (inches): 4
  • Salinity Tolerance: Medium
  • Shade Tolerance: Intolerant
  • Temperature Minimum (°F): -2
  • Bloom Period: Mid Spring
  • Commercial Availability: No Known Source
  • Fruit/Seed Abundance: Medium
  • Fruit/Seed Period Begin: Spring
  • Fruit/Seed Period End: Summer
  • Fruit/Seed Persistence: No
  • Propagated by Bare Root: Yes
  • Propagated by Bulbs: No
  • Propagated by Container: No
  • Propagated by Corms: No
  • Propagated by Cuttings: No
  • Propagated by Seed: Yes
  • Propagated by Sod: No
  • Propagated by Sprigs: Yes
  • Propagated by Tubers: No
  • Seed Spread Rate: Slow
  • Seedling Vigor: Medium
  • Small Grain: No
  • Vegetative Spread Rate: Rapid




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