Curved spines, 6″ d. stems, red flowers.
Small clusters, globose to 6″, bright yellow flowers
Caudiciform trunk; Deciduous
Clusters of upright stems, branch from the base.
Stems to 12″ tall, clumps of many spiny branches. Tan to Burgundy carrion flowers. Stems are eaten as an appetite suppressant by the San people of the Namib. Very low water.
Pairs of 4″ leaves; Keep dry, winter growing
Fleshy roots; green stems/reddish tips, papery spines; Chihuahuan Desert
Small 6″ stems, geophytic opuntioid. Pink flowers.
One of the largest genera
Species ranger in size from an inch to a yard
Soft and fuzzy appearing, low clustering small barrels with cream-colored flowers.
Small multi-stemmed globose with variable flowers, some bristles
Small globose with variable flowers, lots of bristles
3-4″ round stems form large clusters. Pink to white flowers. Hooked spines, downy white hairs.
Usually solitary, some clumps; to 10″h.; woolly between short central spines
Slow to form large clusters. Variable spines. Lots of bright pink flowers.
4″. Dense clusters of deep green globose stems. Wild spines, creamy flowers.
Long stems, 1″ diameter, clumping; tight star-shape spines. Small cream-colored flowers form a crown around the tips of the stems.
Large clumps of 3″d. x 7-8″ long stems.
Usually solitary, 4-6″
Small clumper, 4″ cylindrical; wooly between long spines; 4 subspecies
Small solitary green globular plant to 2″
Very cold hardy. Small ball cactus to 5″d.
Low dense clusters get covered with fine white hairs
Mini grey-green globular plant covered w/soft white spines. Readily clumping
Pronounced green tubercles. Usually solitary, to 6″d.
8″d. Clumping w/prominent tubercles, some axil wool
Generally forms clumps, to 2″d./6″h.; tubular red flowers
Medium sized solitary plants, pyramidal stems; long radial spines
Generally clumping, narrow stems to 6″ tall. Variable spination.
Usually solitary, globose to 6″. Carmine red flowers.