(This plant comes in a 3.5" pot. You will receive a very similar plant to the one in the picture. It may or may not be blooming at the time of your purchase. The plant is shipped in its pot to prevent any damage to the roots).
Opuntia subulata cristata is a very popular cristate form with undulating green fans. Member of the family known as Prickly Pear. Opuntia subulata is normally columnar with slender stems to 6' or more.
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz
I purchased one of these lovely green succulents last spring and it has doubled in size. I purchased the second one as a gift for a niece who says it arrived well-packed and safely and she's excited to get it transplanted to give it room to grow.
I love, love, love the way they pack their plants. My plant arrived and all those green “fingers were intact” I may have broken one or two off potting it. I am not as skilled as the folks at Planet Dessert. I will buy from them again.