Acanthus ilicifolius
Description
Description
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[thumb\|left\|From Kerala, India](/wiki/File:Mangroves_at_Muzhappilangad%2C_Kannur%2C_Kerala_00_%2822%29.jpg "Mangroves at Muzhappilangad, Kannur, Kerala 00 (22).jpg")
The plant grows as a shrub, up to  tall. It has shallow tap roots and occasionally develops a . Fruits are kidney\-shaped.


Are there any environmental factors that affect the development of tap roots?