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Key to Hyacinthaceae

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1 Tepals united into a perianth tube longer than the free portion; [subfamily Hyacinthoideae, tribe Hyacintheae].
  2 Perianth tube <2 × as long as the lobes; corolla spreading and open at the mouth
  2 Perianth tube >2 × as long as the lobes; corolla contracted at the mouth
1 Tepals separate or fused only at the extreme base.
    3 Tepals white, with a greenish stripe on the outer surface, separate; bracts 0-1 per flower; [subfamily Ornithogaloideae]
      4 Bulb large, > 3 cm in diameter; leaves > 10 mm wide; tepals thick-textured, ± oblong, whitish or yellowish with distinct, broad, green to brown longitudinal band on adaxial surface associated with 3-5 medially aggregated veins
      4 Bulb to 3.5 cm in diameter; leaves 3-10 (-15 mm) wide; tepals usually ovate or lanceolate, thick- or thin-textured, unicolored or with narrow, indistinct green or brownish keel on adaxial surface not associated with medially aggregated veins
    3 Tepals blue (less commonly white or pink), separate or fused at the extreme base; bracts either 0-1 or 2 per flower; [subfamily Hyacinthoideae, tribe Hyacintheae].
        5 Bracts 2 subtending each flower
        5 Bracts 0-1 subtending each flower.
          6 Tepals connate basally for more than 1/10 of their length; flowers directed upward
          6 Tepals separate; flowers directed outward
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