Between Willow and Darwinia, which genus has more species?
Willow Willows, also called sallows, and osiers, form the genus Salix, around 400 species of deciduous trees and shrubs, found primarily on moist soils in cold and temperate regions of the Northern Hemisphere. Most species are known as willow, but some narrow-leaved shrub species are called osier, and some broader-leaved species are referred to as sallow (from Old English "sealh", related to the Latin word "salix", willow). Some willows (particularly arctic and alpine species) are low-growing or creeping shrubs; for example, the dwarf willow ("Salix herbacea") rarely exceeds 6 cm in height, though it spreads widely across the ground.
Darwinia oxylepis Darwinia oxylepis, commonly known as Gillham's bell, is a plant in the myrtle family Myrtaceae. It grows as an dense, upright shrub 1.0 - 1.5 metres (3 – 4.5 ft) high and produces large numbers of red inflorescences prominently displayed on the ends of the branchlets in spring. It is one of a group of Darwinias including "D. leiostyla", "D. macrostegia", "D. meeboldii", "D. collina" and "D. squarrosa" collectively known as mountain bells. The species is found in only a few seasonally moist gullies near the lower slopes of the Stirling Range National Park and nearby Porongurup National Park and is therefore classified as endangered.