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5-Areoles of Cactaceae

[FMP-field: image]

Areoles are small structures on the photosynthetic stems of cacti; often, spines are produced at the areole. The areole is usually interpreted as a rudimentary shoot, and the spines are reduced leaves borne on this shoot. Areoles can also contain numerous bristles, called glochids, at the bases of the spines.

Photo by K. R. Robertson from a plant cultivated at the University of Illinois.

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