Euphorbia royleana is a cactus with short prickles along its stems. The flowers are yellow in color. It branches from the upper parts. The stems become leafless during hot and cold seasons. They are produced in the moist season and soon fall. They are usually not seen when in flower.
Plant height = 28 inches above soil
Planter height = 12 inches
Original pics of plant attached.
Pictures with and without leaves included.