1. It is so noted because its glochids may blind cattle.

2. The spines are not easily detachable, but on certain cacti, members of the subfamily Opuntioideae, smaller, detachable bristles, glochids, also grow out of the Areoles and

3. Other articles where Areole is discussed: cactus: Physical characteristics: …plants by the presence of Areoles, small cushionlike structures with trichomes (plant hairs) and, in almost all species, spines or barbed bristles (glochids)