African marigold

Tagetes erecta, the Aztec marigold, Mexican marigold, big marigold, cempazúchitl or cempasúchil, is a species of flowering plant in the genus Tagetes native to Mexico. Despite being native to the Americas, it is often called the African marigold. In Mexico, this plant is found in the wild in the states of México, Michoacán, Puebla, and Veracruz.
This plant reaches heights of between 20 and 90 cm (7.9 and 35.4 in). The Aztecs gathered the wild plant as well as cultivating it for medicinal, ceremonial and decorative purposes. It is widely cultivated commercially with many cultivars in use as ornamental plants,[6] and for the cut-flower trade.
Some authorities regard Tagetes patula (the French marigold) as a synonym of Tagetes erecta.
It is a herbaceous annual or perennial plant whose height ranges from 30–110 cm. The root is cylindrical, pivoting, with a fibrous and shallow branching system. The stem is striated, sometimes ridged, smooth or slightly with villi, cylindrical, oval and herbaceous to slightly woody, with resin channels in the bark, which are aromatic when squeezed. Opposite leaves at the bottom alternate at the top, up to 20 cm long, pinnate, composed of 11 to 17 leaflets, lanceolate to linear-lanceolate, up to 5 cm long and 1.5 cm wide, acute to acuminate, serrated to sub-holders, the lower ones of each leaf frequently setiform (in the form of threads), the superiors are sometimes completely setiform; with abundant round glands.
The main characteristic of the flowers is that they are grouped in small heads or in solitary inflorescences, on peduncles up to 15 cm long, they are liguladas of yellow colors to red. In the flowers of the disc: 150 to 250 in the simple heads, in the doubles it shows different degrees of transformation in ligules, yellow to orange corollas, of 8 to 10 mm in length. The fruits and seeds are: linear achenes 7 to 10 mm long, smooth or slightly covered with stiff hairs at the corners. It has a long flowering period extending throughout the summer and fall. It reproduces easily by seeds.