Sas and 'Asa (Zan).
Professor Asa Gray says that out of 66 genera and 155 species found in the forest east of the Rocky Mountains, only 31 genera and 78 species are found west of these heights.
Deity: Asa, the Green God, represents growth and fertility.
Mkhulu Nsingiza:"The spring equinox marks the beginning of the year, governed by the principle of Asa, the Green God, symbolizing growth.