The flowers are reported to be red only by some, and yellow with a red stripe or tinge by others.
The 'gracilis' subspecies usuall...Read Morey grows higher than 3 feet. it's central spines are less than 5mm wide.
The 'coloratus' subspecies seldom grows to 3 feet high. It's widest central spines are often wider than 5 mm.
The 'gatesii' subspecies can grow to 5 feet high. It's central spines are only 3 mm wide and curved but not hooked
The flowers are reported to be red only by some, and yellow with a red stripe or tinge by others.
The 'gracilis' subspecies usuall...Read More