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Condition involving increased stem elongation. poor leaf development. and a lack of chlorophyll; found in plants growing in the dark or with greatly reduced amount of light

etiolation (Wikipedia)

Etiolation /tiəˈlʃən/ is a process in flowering plants grown in partial or complete absence of light. It is characterized by long, weak stems; smaller leaves due to longer internodes; and a pale yellow color (chlorosis). The development of seedlings in the dark is known as "skotomorphogenesis" and leads to etiolated seedlings.

Spanish bluebells Hyacinthoides hispanica, showing both leaves and flowers in both etiolated and non-etiolated states. The longest etiolated leaves are about 50 cm long
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