Used Occasionally. protozoa is one of the 30000 most commonly used words in the Collins dictionary.
It is a species of hardy deciduous flowering shrub in the genus Dasiphora (formerly Potentilla) of the family Rosaceae, native to the cool temperate and subarctic regions of the northern hemisphere, often growing at high altitudes in mountains.
Potentilla is one of the most common, and easiest shrubs to grow. It starts blooming in late spring and continues through autumn, bearing cheery yellow, orange, red, or white flowers that look like single roses (which attract butterflies).