Size 4 to 6 feet x 6 to 8 '. Location on campus is off path leaving road going to Kellogg Mansion. Hooked spines along margin of leaf and on tip. Propagates by producing clumps at base and reseeds itself. Takes 1 - 2 years to complete flowering, then that portion of the plant dies back to base.
Flowers have yellow color.
Likes adequate drainage, don't plant in low areas. Should be used only on large landscapes. Good barrier plant. Growth rate is moderate. Plant in full sun.