Cylindrical 6″, brown spines, variable yellow/pink blooms
Small, globose, dense white bristle-like spines, moderate clumping. Variable. Can get 4″dia. and 2 to 20″ tall. Yellow flowers.
P. mammulosa ssp. submammulosa
Solitary, globose to 5″d.; 13 ribs, 7-10 spines
5″ dia., usually solitary, apical wool, olive green.
Grows on sandstone cliffs. Variable spines, white, yellow to brown. Keep dry in winter. Yellow flowers.
Small globose stems, usually solitary, occassional clumps. Pink flowers. Thin spines flattened back along the stems. Chin-like ribs.
1/2″ square stems, vining to 10ft. Underground caudex. Huge white night-blooming flowers. Hardy down to the mid-20s but may take damage below freezing. Needs summer heat to bloom.
Tiny branches to 4’tall, underground caudex
Gorgeous blue columnar cactus, branching above ground when young. Can grow to 30 feet tall in habitat. Will form a substantial trunk.
Stunning tall frosty green-silver cactus with golden spines, to 12ft tall. Can be grown outside during the summer but should be kept inside, or dry under an overhang for the winter in the Bay Area.
Slender-branched tree to 35 ft. tall
Tree-like cactus with tufts of wool and funnel shaped blooms. Stunning waxy blue stems with golden spines. Can be grown outside during the summer but should be protected from frost. Keep dry in the winter.
Tree-like to 30+ft. tall; glaucous stems, golden spines.
Stunning waxy blue cactus with golden spines and wool along the ribs. Can be grown outside during the summer but should be kept inside, or dry under an overhang for the winter in the Bay Area.
Chartreuse night-flowers, edible “chichituna” red fruit. Branchy to15ft.
Caudiciform opuntioid. Prostrate stems, large underground roots. Can lose all above ground stems in winter. Copper-orange flowers. Keep cool and dry in winter.
Shrubby trees in the Opuntioideae Subfamily to 50 ft. tall.
Small clumps of a few thick leaves in rocky soils. Tuberous roots. Yellow flowers spring and summer.
Small clumps of 1-2″ round stems, yellow flowers.
R. fiebrigii var. densiseta
Small clusters of small stems, orange flowers
Clusters of small 1″ barrels, blooms spring/summer.
Clumping spiny 1″ barrel blooms in spring/summer
Small clusters of small round stems. Dark green flesh hidden behind dark brown spines. Dark red flowers.
Clumping small 2″ barrels with orange blooms in spring.
“Short Spined” variety
Clustering small stems, variable red to magenta flowers, spiraling ribs with prominent tubercles. Elongate areoles. Short, tiny brown spines. Purple-tinged stems in full sun.
Mini barrels to 3-4″; dark stems, many long spines; red blooms.
Clumping barrels to 2″; dark stems, white spines; reddish blooms.
Freely clumping 2 1/2″ flattened stems.
Clumping small 1″ barrels with hordes of blooms in spring
Generally clumping small 1″ barrels with hordes of blooms in spring
Orange flowers. Usually solitary, will eventually grow 8″ high.