Allium shevockii, the Spanish Needle onion, grows from a bulb one to one and a half centimeters wide which may have one or two large daughter bulblets.
Atop the stem is an inflorescence of up to 30 flowers, each just over a centimeter wide. The six shiny tepals are maroon to rich pink in color and may be white near the bases. In a manner unique among the onions, the tepals are reflexed, curling outward from the flower center.
The plant is endemic to California where it grows on the talus slopes of the High Sierra. It is a resident of Owens Peak, which is the highest point in the Sierra. It is named after the Sierra mountain peak known as Spanish Needle.