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Narcissus: Key to Narcissus

Amaryllidaceae

Narcissus

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(c) Ware, Richard & Teresa - CC-BY-NC, permission granted to NCBG
(c) Sasan, Kimberlie - CC-BY-ND
1 Flowers doubled, the corona divided into numerous segments resembling tepals; stamens usually petaloid.
(c) Sasan, Kimberlie - CC-BY-ND
  2 Corona segments shorter than the tepal lobes; flowers bicolored, corona segments usually bright orange and tepals pale yellow to creamy-yellow (petaloid stamens cream to yellow in color)
(c) Fleming, Gary P.
  2 Corona segments and tepal lobes all about the same length; flowers yellow to greenish, corona segments frequently similar in color to tepals
(c) Kieschnick, Sam - CC-BY
1 Flowers not doubled, the corona undivided (like a drinking glass or cup) and distinct from the tepals; stamens not petaloid.
    3 Tepal lobes 10-15 mm long; corona 3-5 mm long; leaves dark green, either cylindrical and hollow or somewhat flattened and grooved; umbel (or stem) with 3-10 flowers.
(c) Sasan, Kimberlie - CC-BY-ND
      4 Leaves somewhat flattened, grooved, 3-10 mm wide; tepal lobes light lemon-yellow; corona yellow-orange, distinctly darker than the tepal lobes
(c) Kieschnick, Sam - CC-BY
(c) Lindqvist, Annika - CC-BY
      4 Leaves cylindrical (terete), 2-4 mm wide; tepal lobes golden-yellow; corona golden-yellow, the same as the tepal lobes or only slightly darker
(c) Arbault, Thierry - CC-BY
    3 Tepal lobes 10-50 mm long; corona 5-50 mm long; leaves green to glaucous, flattened, solid; umbel (or stem) with 1-20 flowers.
(c) Arbault, Thierry - CC-BY
        5 Tepal lobes distinctly reflexed back, ca. 180 degrees
(c) Liu, Y. - CC-BY
        5 Tepal lobes borne at close to a 90 degree angle to the flower axis.
          6 Hypanthial tube (below the tepal lobes) parallel-sided (though sometimes suddenly expanded at its apex); corona < 10 mm long, usually wider than high; corona < 0.5× as long as the perianth lobes; corona rarely undulate; umbel (or stem) with 1-10 flowers; stamens of 2 distinct lengths.
(c) Fleming, Gary P.
             7 Corona rim red, contrasting with the white or yellow corona (though sometimes fading when dried); umbel (or stem) with 1 flower
(c) Folini, Franco - CC-BY
             7 Corona of a single color, all white or yellow; umbel (or stem) with (1-) 2-8 (-20) flowers.
(c) McMasters, Melissa - CC-BY
               8 Umbel (or stem) with (1-) 2 (-3) flowers; pollen grains malformed (sterile)
(c) Holt, L. K. - CC-BY
(c) Offner, Tia - CC-BY
               8 Umbel (or stem) with (2-) 3-8 (-20) flowers; pollen grains normal, turgid (fertile).
(c) Liu, Y. - CC-BY
                 9 Corona white; umbel (or stem) with < 20 flowers
(c) Offner, Tia - CC-BY
                 9 Corona yellow; umbel (or stem) with (2-) 3-8 (-15) flowers
(c) Nesterova, Svetlana - CC-BY-NC, permission granted to NCBG
          6 Hypanthial tube (below the tepals) distinctly widening toward its apex; corona usually > 10 mm long, usually as long as wide or longer than wide; corona usually > 0.5× as long as the perianth lobes; corona margin undulate; umbel (or stem) with 1(-3) flowers; stamens of the same length or nearly so.
(c) Thorpe, Stephen - CC-BY-NC, permission granted to NCBG
                   10 Tepal lobes linear to lanceolate, < 5 mm wide
(c) Ware, Richard & Teresa - CC-BY-NC, permission granted to NCBG
                   10 Tepal lobes ovate, triangular-ovate, or suborbicular, > 10 mm wide.
(c) Fleming, Gary P.
                     11 Corona 30-50 mm long, about as long as the tepal lobes
                     11 Corona 10-25 mm long, nearly as long as or distinctly shorter than the tepal lobes.
(c) Finzel, Brian - CC-BY-SA
(c) Finzel, Brian - CC-BY-SA
                       12 Umbel (or stem) with (1-) 2-4 flowers; corona and tepal lobes the same color; leaves green, < 8 mm wide; stem nearly terete
(c) scrofa, Sus - CC-BY
                       12 Umbel (or stem) with 1 (-3) flowers; corona usually conspicuously darker in color than the tepal lobes; leaves green or glaucous, > 8 mm wide; stem distinctly 2-edged
(c) Boerekamps, Jean-Paul - CC0
(c) scrofa, Sus - CC-BY
                          13 Umbel (or stem) with 1 (-3) flowers; corona > 0.75× as long as the tepal lobes; leaves green; flowering stems usually < 30 cm tall
(c) ass, the swamp - CC-BY
                          13 Umbel (or stem) with 1 flower; corona < 0.75× as long as the tepal lobes; leaves somewhat glaucous; flowering stems often > 30 cm tall