Another thread inspired this, intended to pay homage to A. parryi, a favorite of many. There are five named varieties, along with countless intergrades and at least two natural hybrids. The named varieties are:
A. parryi ssp. neomexicana
A. parryi ssp. parryi
A. parryi ssp. parryi v. couseii
A. parryi ssp. parryi v. huachucensis
A. parryi ssp. parryi v. truncata
The first pics show the v. truncata variety, not necessarily the most impressive of the group, but certainly the most popular, largely because they are gorgeous when small and available for sale. Other larger, more impressive versions aren't nearly this attractive when young.
Next up is my absolute favorite, a version rarely seen and vastly underused, ssp. parry v. parryi. It's still young, but will grow into a tight, round artichoke shape about twice the size of v. truncata within the next 2-3 years.
I saw a plant identified as A parryi var havardiana... is that its own species or was that sign completely off its mark? Here are some plants identified as A havardiana (can't find photo of that sign now)... these not an A parryi variety?