Jepson Flora Project: Jepson Interchange    
 

The Jepson Manual: Higher Plants of California

    THIS PAGE IS NO LONGER UPDATED
    AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

Names are linked to treatments from the Manual


Key to LEMNA

N.B.: couplets are linked, e.g., 1. is linked to 1'.

  1. Plant body 6–10 mm, on a tapered stalk, often connected in branched chains of 10–30
L. trisulca
  1' Plant body 1–5 mm, appearing sessile, single or in clusters of 2–8
 
    2. Vein 1 per plant body (sometimes obscure)
 
      3. Plant body 1–2.5 mm, widely elliptic, generally thicker in middle, generally in pairs; vein < 2/3 distance from root node to tip of plant body
L. minuta
      3' Plant body 2–4 mm, ± oblong, very thin, transparent green, generally 4–8 attached; vein up to 3/4 distance from root node to tip of plant body
L. valdiviana
    2' Veins 3–5 per plant body
 
      4. Root sheath with 2 obvious, wing-like appendages at base
L. aequinoctialis
      4' Root sheath not winged
 
        5. Plant body widely elliptic to round, tip asymmetric, lower surface generally much swollen or rounded
L. gibba
        5' Plant body widely elliptic, tip symmetric, lower surface flat
 
          6. Upper surface generally smooth; lower surface green; winter buds 0
L. minor
          6' Upper surface generally with midline row of minute bumps; lower surface becoming ± red; winter buds dark green or brown in autumn
L. turionifera


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