Ceratozamia sp.

The plants are dioecious, with a globose or cylindrical stem, rarely dichotomously branched, that may be underground or emergent. The leaves are pinnately compound, straight, and spirally arranged. Leaf bases are usually deciduous but sometimes persistent. The petioles and rachis often have spines, though there may be very few to none. Leaflets are simple, entire, and articulate at the base, with parallel side veins and no distinct central vein.

Cercidium floridum, Parkinsonia florida

It is usually multi-trunked and has the most beautiful green bark. It has very small leaves and goes deciduous with drought or cold. When it does drop its leaves to conserve water, it is able to continue photosynthesizing through the green stems and trunk. In the Spring, the branches burst into bloom. The tree is covered in clusters of yellow, orchid-like blossoms. The tree has an overall bluish cast with small thorns. Being from the desert, it needs perfect drainage and is drought tolerant. Supplemental water does encourage more bloom. Makes a beautiful patio tree. Propagation: By seed.

Cereus peruvianus, Cereus repandus, Cereus uruguayanus, Cereus hildmannianus

Cereus peruvianus is a large erect, thorny columnar cactus. It is an unexplored, underutilized cactus, grown only as an ornamental plant, even though it produces attractive, edible fruits. The nocturnal flowers remain open for one night. The fruits are thornless and vary in skin color from violet-red to yellow. The flesh, which is the edible part of the fruit, is white and contains small, edible, and crunchy seeds. Fruits of a number of other columnar cacti, also belonging to the subfamily Cactoideae, tribe Cereeae, are known to be of economic significance for native use in South America.The Cereus peruvianus is a very upright plant and is used mainly as a floor plant.Many people think from the start that since the plant is a cactus or in the cactus family it shouldn't be watered or it only needs a little. In the watering department it wants to be watered well. What this plant wants as well as most cactus is very good drainage, warmth, sun and low humidity. This plant is a perfect candidate for a sunny south, east or west window. The plant can handle low light levels but thrives in bright light.

Chloroleucon tortum, Pithecellobium tortum

Chloroleucon tortum has delicate branches and tiny light-green compound leaves and is spiny. The leaves fold up at night or in subdued light. Will tolerate temperatures in the upper 30F range, but not for a long time.

Citrus aurantifolia

Citrus aurantifolia has a globose fruit, 1-2in in diameter, that is greenish-yellow when ripe but usually picked green and valued for its sourness and flavor. C. aurantifolia is a shrubby tree, to 16ft, with many thorns. Dwarf varieties are popular with home growers and can be grown indoors in winter in colder climates. The trunk rarely grows straight, with many branches that often originate quite far down on the trunk. The leaves are ovate 1-3.5in long, resembling orange (the scientific name aurantifolia refers to the leaves' resemblance). The flowers are 1in in diameter, are yellowish white with a light purple tinge on the margins. Flowers and fruit appear throughout the year but are most abundant from May to September.

Citrus x latifolia is most likely from a cross between Citrus aurantiifolia and Citrus limon.