genus opuntia การใช้

"Opuntia trichophora " ( Engelm . & J . M . Bigelow ) Britton & Rose, is a species of cactus in genus Opuntia, more commonly known as prickly pears or nopal . " O . trichophora " is distributed throughout parts of New Mexico, Colorado, and Utah, and may have disjoint populations in Wyoming, southern Montana, and southern Idaho . " Opuntia trichophora " is a diploid ( 2n = 22 ) but has sometimes been treated as a variety of " Opuntia polyacantha " a tetraploid ( 2n = 44 ) . " O . trichophora " tends to have longer spines than " O . polycantha " or " O . macrorhiza ".