In this task, you are given a context paragraph, a question based on that and corresponding answer of a question. Your task is to generate supporting fact/knowledge from context paragraph which helps in answering a given question.

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. Question: Between Willow and Darwinia, which genus has more species? Answer: Darwinia
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.