Cereus aethiops Mesemb The flowers (actually inflorescence) are

The flowers (actually inflorescence) are a strange multi lobed shape

Easy to grow but can be sensitive to overwatering

In good light the color is a deep blood red mixed with orange highlights

Agave isthmensis  Family: Agavaceae

Hardy to at least zone 5 (probably zone 4) but make sure to acclimate your plant during the fall so it can harden off properly

Cereus aethiops Mesemb The flowers (actually inflorescence) areCereus aethiops A nice columnar species with dark black spines. The plants can be purple during winter dormancy or times of stress but is otherwise blueish green normally. This is one of the smaller columnar species, only reaching 5 6' or so, making it reasonable as a potted indoor plant near a bright window for those in colder climates. Makes big tubular flowers during the warmer months. Easy to grow, just give normal succulent care of good light and