Plant morphology share the same basic structure and development as leaves in other plants, and therefore cactus spines are homologous to leaves as well. This aspect of plant morphology overlaps with the study of plant evolution and paleobotany. Secondly, plant morphology observes both the vegetative (somatic) structures of plants, as well as the reproductive structures. The vegetative structures of vascular plants includes the study of the shoot system, composed of stems and leaves, as well as the root system. The reproductive structures are more varied, and are usually specific to a particular group of plants, such as flowers and seeds, fern sori,
Justicia (plant) often recover in the spring after freezing back in USDA Plant Zone 8a. "Justicia carnea" (formerly "Jacobinia carnea", common names including Brazilian plume flower, flamingo flower, and jacobinia) is native to South America in southern Brazil, Paraguay and northern Argentina. It is hardy to −2 °C but will often recover in the spring after freezing back in USDA Plant Zone 8a. "Justicia procumbens" is procumbent herb with angular stems, swollen at nodes, small ovate leaves, small purple flowers in terminal spikes, inserted didynamous stamens, and shortly bilobed stigmas. Genera which have been brought into Synonymy with "Justicia" include "Acelica, Adhatoda,