The flowers are yellow are 8 to 12 cm long and can reach diameters between 5 and 7 centimeters. The fruits are green to brown, shaped like a lid.
Opuntia: generic name that comes from the Greek used by Pliny the Elder for a plant that grew around the city of Opus in Greece.
echios: epithet that comes from the Greek and means "head of hairy snake". Presumably, because of the similarity of the dense head of thorns with a snake with thin to thick bristly hairs.
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