Its central spine is about 3⁄8 inch (0.95 cm) in diameter with five to 9 radials and slightly yellowish in color.

The flowering areoles located near the shoot tips are covered with numerous bristles up to 2 centimeters long.

Their pericarpel and floral tube are covered with scales that carry wool and bristles in their axils.

[2] The species is native to Mexico states of Hidalgo, México, Guanajuato, Querétaro, Morelos, Puebla, Oaxaca, Colima, Michoacán, and Guerrero.

[verification needed][5] The specific epithet marginatus comes from Latin, means 'bordered' and refers to the 'edges' formed by the areoles that flow together on the ribs.