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Key to Hydrocotyle

Araliaceae

Hydrocotyle

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(c) Ware, Richard & Teresa - CC-BY-NC, permission granted to NCBG
1 Leaves peltate, lacking a sinus extending to the attachment of the petiole.
(c) Ware, Richard & Teresa - CC-BY-NC, permission granted to NCBG
  2 Inflorescence umbellate; leaves 1-4 (-7) cm wide
(c) Campos, Aidan
  2 Inflorescence verticillate or umbellate-verticillate (when first developing sometimes appearing merely umbellate); leaves 1-15 cm wide.
(c) Campos, Aidan
    3 Inflorescence compound, the main inflorescence axis with nodes which produce verticils or umbels of pedicellate flowers, the inflorescence nodes also producing branches which themselves produce verticils or umbels of flowers; leaves (1-) 4-15 cm wide, the blade often held in a vertical plane
(c) Fleming, Gary P.
    3 Inflorescence verticillate, all the flowers borne sessile or on pedicels attached to the unbranched inflorescence axis; leaves 1-6 cm wide, the blade usually more-or-less in a horizontal plane.
(c) Amyx, Herbert L.
1 Leaves not peltate, a sinus extending to the attachment of the petiole.
(c) Amyx, Herbert L.
      4 Central leaf lobe notably more distinct than the other lobes (the sinuses on either side extending 1/3 to 3/4 of the way to the petiolar attachment); stems and petioles fleshy
      4 Central leaf lobe not more distinct than the other lobes (the sinuses on either side extending 1/10 to 1/4 the way to the petiolar attachment); stems and petioles filiform.
(c) Danielson, Erik
        5 Fruiting umbels on peduncles 1-3 mm long; leaves 10-50 mm wide; [native of bogs, spray cliffs, and other wetlands]
        5 Fruiting umbels on peduncles 9-24 mm long; leaves 5-30 mm wide; [exotic of lawns and other disturbed habitats].
(c) Hill, Sonnia
          6 Leaves 5-lobed, 15-30 mm wide, pubescent
(c) Fleming, Gary P.
          6 Leaves 7-lobed, 5-13 mm wide, glabrous