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5.Morphology of Flowering Plants
normal
Swollen spongy petiole is present in
A
Hydrilla
B
Eichhornia
C
Ruppia
D
Pistia
Solution
(b) Some time the petiole becomes swollen and spongy due to the development of aerenchyma.
The type of petioles encloses much air and helps the plant to float.
e.g., Trapa bispinosa and Eichhornia.
Standard 11
Biology
