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"Cereus speciosissimus. 1. section of the fruit of Opuntia deillenii; 2. of the seed; 3. section of seed of Mammillaria." -Lindley, 1853

Cactus

"Cereus speciosissimus. 1. section of the fruit of Opuntia deillenii; 2. of the seed; 3. section of…

The envelope of the opuntia flower is wheel shaped or widely spreading.

Opuntia Flower

The envelope of the opuntia flower is wheel shaped or widely spreading.