Bidens macroptera (Sch. Bip. ex Chiov.) Mesfin Tadesse

From September to November, much of the Ethiopian plateau and many river valleys, hills, and mountain slopes in Ethiopia are covered by yellow-flowered Bidens species, including B. macroptera. In some locations, these flowers grow in masses so dense that they resemble cultivated fields.

In Ethiopia, yellow is a symbol of peace, hope, and love . Yellow Bidens are often displayed to signify the end of the rainy season and the beginning of the dry and sunny season and, more specifically, the start of the Ethiopian New Year, which usually falls on September 11th on the Gregorian calendar. Bouquets of these flowers are often presented to families or friends as gifts. Together with grasses and sedges, they are also used in decorating the floors of homes, particularly during household or communal coffee ceremonies.

Bidens macroptera is known only from Ethiopia. It grows on rocky mountain slopes and in grasslands, forest margins, and open places in ericaceous scrub; rarely, it is found along roadsides. Another Bidens species, B. prestinaria, is the most widespread Bidens in Ethiopia (it occurs also in the highlands of Sudan). Bidens prestinaria is more prevalent at lower altitudes and in cities in towns, whereas B. macroptera is more common at higher altitudes. Together, these two species form a conspicuous component of the flora of the Ethiopian_Highlands.

(Mesfin Tadesse, in litt. 2011)

Bidens macroptera, or adey abeba, is a flowering plant native to Ethiopia. In Ethiopia, adey abeba symbolizes the end of the rainy season and the start of summer. It also indicates the end of a year and the beginning of a new one. For Ethiopian New Year (Enkutatash), a group of young girls sing the traditional new year song Abebayehosh and give adey abeba to their parents and loved ones as a symbol of luck and blessing for the new year.

Bidens macroptera là một loài thực vật có hoa trong họ Cúc. Loài này được (Sch.Bip. ex Chiov.) Mesfin mô tả khoa học đầu tiên năm 1984.