Echinopsis leucomalla cob cactus
(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).
This gorgeous plant has compact stems closely covered with white spines, and huge and spectacular pale lemon yellow flowers.
Habit: Solitary or with several basal and lateral offshoots.
Blooming season: It flowers in mid spring on into summer. Sometimes it blooms profusely, especially on older plants.
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz