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Key to Hymenocallis

Amaryllidaceae

Hymenocallis

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1
Ovules 4-8 per locule; ovary 14-30 mm long, 6-15 mm wide; [FL].
  2
Corona 6-9 cm wide
 ⇒ Hymenocallis rotata

(c) Ward, Scott G - CC-BY
  2
Corona 3-6 cm wide.
    3
Tepals yellowish-green to pale green throughout.

(c) Ward, Scott G
      4
Flowers 2 per inflorescence; tepals spreading, nearly always longer than the perianth tube; [Panhandle FL].
 ⇒ Hymenocallis henryae

© Floyd A. Griffith
© Floyd A. Griffith
      4
Flowers 1 per inflorescence; tepals ascending, equal to or shorter than the perianth tube; [ne. FL south to s. FL]
 ⇒ Hymenocallis palmeri

(c) Ward, Scott G
    3
Tepals white (their keels typically green on the lower surface).

(c) Cressler, Alan M.
      5
Leaves evergreen, 3.5-7.5 dm long; corona 2-3 cm across; [Charlotte County, FL peninsula]
 ⇒ Hymenocallis puntagordensis

(c) Cressler, Alan M.
      5
Leaves deciduous, (1.3-) 2.0-3.8 dm long; corona about 4-6 cm across; [c. and s. FL peninsula, also Wakulla County, FL Panhandle].
        6
Free filaments 1.5-3 cm long; anthers 12-15 mm long; longest leaf at anthesis < 4 dm long; [Wakulla County, FL Panhandle]
 ⇒ Hymenocallis godfreyi

(c) Cressler, Alan M.
        6
Free filaments 2-4 cm long; anthers 15-20 mm long; longest leaf at anthesis > 4 dm long; [c. and s. FL peninsula]
 ⇒ Hymenocallis tridentata

(c) Bridges, Edwin
(c) Bridges, Edwin
1
Ovules 1-3 (-4) per locule; ovary 7-15 mm long, 5-10 mm wide; [collectively more widespread].
  7
Staminal cup > 4.5 cm long; [rocky river shoals of the Piedmont of AL, GA, and SC, and the Ridge and Valley of AL]
 ⇒ Hymenocallis coronaria

(c) Stuart, Will
(c) Ware, Richard & Teresa - CC-BY-NC, permission granted to NCBG
  7
Staminal cup < 4.5 cm long; [Coastal Plain, Piedmont floodplains, and the GA Ridge and Valley].
    8
Leaves oblanceolate, slightly to distinctly wider toward the tip.

(c) Griffith, Floyd A.
      9
Leaves not coriaceous, distinctly glaucous; scape bracts 4-7 cm long, the tip long-acuminate; bulbs non-rhizomatous; [of moist but not mucky habitats]
        10
Leaves withered at anthesis
 ⇒ Hymenocallis occidentalis var. eulae

(c) Hill, Sonnia
(c) Hill, Sonnia
        10
Leaves fresh at anthesis
 ⇒ Hymenocallis occidentalis var. occidentalis

(c) Shaw, Dylan - CC-BY
© Floyd A. Griffith
      9
Leaves coriaceous, not glaucous; scape bracts 3-4 (-6) cm long, the tip acute; bulbs rhizomatous; [of wet habitats].
        11
Scape bracts 3-4 (-6) cm long, the tip acute; leaves distinctly wider toward the tip; bulb 3-6 cm long, 1.5-5 cm wide
 ⇒ Hymenocallis choctawensis

(c) Griffith, Floyd A.
        11
Scape bracts 4-5 cm long, the tip acuminate; leaves slightly wider toward the tip; bulb 4.5-7.5 cm long, 2.5-5.5 cm wide
 ⇒ Hymenocallis gholsonii

(c) Griffith, Floyd A.
(c) Griffith, Floyd A.
    8
Leaves liguliform, not wider toward the tip, the margins parallel throughout.

(c) Weakley, Alan
      12
Flowers (3-) 5-12 per inflorescence.

(c) Sorrie, Bruce A. - CC-BY
        13
Leaves evergreen, 5-10 dm long, 4-9 cm wide; flowers 9-15 per inflorescence; pollen orange; [FL]
 ⇒ Hymenocallis latifolia

(c) Weakley, Alan
        13
Leaves deciduous, 3.2-8.2 (10.6) dm long, 1.7-3.6 cm wide; flowers (3-) 5-12 per inflorescence; pollen yellow; [MS westward]
 ⇒ Hymenocallis liriosme

(c) Campos, Aidan
      12
Flowers 1-3 (rarely more) per inflorescence.

(c) Bradley, Keith
(c) Corder, Brandon
        14
Staminal cups rotate at full anthesis; leaves chiefly arching low, often appearing prostrate; [of s. GA south into FL]
 ⇒ Hymenocallis duvalensis

(c) Powell, Eric M - CC-BY-NC, permission granted to NCBG
(c) Corder, Brandon
        14
Staminal cups funnelform at full anthesis but gradually spreading in time; leaves suberect to erect; [of se. NC south to FL].
          15
Perianth segments 5.0-6.5 cm long; leaves 1.5-4 dm long
 ⇒ Hymenocallis pygmaea

(c) Bradley, Keith
          15
Perianth segments (6-) 7-11.5 cm long; leaves 3-7 dm long

(c) Powell, Eric M - CC-BY-NC, permission granted to NCBG
             16
Scape bracts narrowly lanceolate, 2.5-5 cm long, 7-12 mm wide; [NC south to ne. FL]
 ⇒ Hymenocallis crassifolia

(c) Powell, Eric M - CC-BY-NC, permission granted to NCBG
(c) Powell, Eric M - CC-BY-NC, permission granted to NCBG
             16
Scape bracts lanceolate, 3-4.5 cm long, 10-15 mm wide; [lower Ochlockonee River, Panhandle FL]
 ⇒ Hymenocallis franklinensis

(c) mfeaver - CC-BY