Scientific: Cereus lamprospermus (syn. Piptanthocereus lamprospermus)
Common: None
Family: Cactaceae
Origin: Paraguay and Bolivia of South America

Pronounciation: Ser-E-us lam-pro-SPER-mus

Hardiness zones:
Sunset 13, 16-17, 21-24
USDA 9 (marginal, protect from cold) to 11

Landscape Use: This arborescent cactus is a very strong focal point for xeric and/or desert landscape themes.

Form & Character: A majestic, strongly arborescent cactus, upright, tree-like, many branched, dominant.

Growth Habit: Slowly upright and much branched to 20 feet.

Foliage/texture: Stems sometimes segmented, dull green to bluish gray, generally 6 to 8 ribs on a mature stem, mostly very short spines typically 8 to 10 per aereole; very coarse texture.

Flowers & fruits: Night blooming, large white flowers with reddish sepals, flowers borne at aereoles. Fruit rarely seen in Phoenix.

Seasonal color: Spectacular flower display in late spring, sometimes will flower during early fall.

Temperature: Tolerant to 25oF.

Light: Full sun.

Soil: A well-drained mineral soil is best.

Watering: Water only occasionally if at all during summers.

Pruning: None, except to control size by occasionally thinning out awkward or crossing stem branches.

Propagation: Relatively easily propagated from elongated softwood stem cuttings of most any length from branched stems. Like other Cereus species, this one will develop roots after directly planting stem cuttings into the soil (right side up!). Make sure to first allow the cut surfaces of the stems to harden for several weeks (callous over) before planting directly into soil.

Disease and pests: Susceptible to root rot in damp poorly drained soils.

Additional comments: This Cereus is a real oddity in the landscape. People will pause and marvel at its unique tree-like form. Ergo, this is a quintessential landscape focal point competing with saguaro or the Bismark palm for the title of #1 visual attractor in the Phoenix area. With age, this arborescent cactus will become very large and will occupy a surpringly large amount of physical and visual space in the landscape.