Are Crotalaria and Genista both types of shrubs?
Crotalaria Crotalaria is a genus of herbaceous plants and woody shrubs in the Family Fabaceae (Subfamily Faboideae) commonly known as rattlepods. The "Crotalaria" genus includes about 500 species of herbs and shrubs. Africa is the continent with a majority of "Crotalaria" species (approximately 400 species). "Crotalaria" are mainly found in damp grassland, especially in floodplains, depressions and along edges of swamps and rivers, but also in deciduous bush land, roadsides and fields. Some species of "Crotalaria" are grown as ornamentals. The common name rattlepod or rattlebox is derived from the fact that the seeds become loose in the pod as they mature, and rattle when the pod is shaken. The name derives from the Ancient Greek κρόταλον , meaning "castanet", and is the same root as the name for the rattlesnakes ("Crotalus").
Vachellia collinsii Vachellia collinsii is a species of flowering plant. It grows in secondary succession in seasonally dry ecosystems in southern Central America, where it exhibits a symbiotic relationship with several species of ant ("Pseudomyrmex spinicola", "Pseudomyrmex ferruginea"). The ant-"Vachellia" system involving this species has been studied by ecologists like Daniel Janzen in Palo Verde National Park and Santa Rosa National Park, both in Guanacaste Province, Costa Rica. The ants chew holes in the tips of the hollow stipular thorns, known as domatia, so that they can enter, and create their colony inside. A single ant colony may span several "V. collinsii" trees.