cleistogamic

/ˌklaɪstəˈɡæmɪk/
adjective
  1. Relating to flowers that self-pollinate without opening, so that the petals never fully open.
    • The violet produces cleistogamic flowers in late summer that never open but still produce seeds.
    • Unlike showy blossoms, cleistogamic flowers are small and hidden among the leaves.
    • Cleistogamic flowers are an adaptation that ensures reproduction even in poor weather.
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