Purple taro (Latin scientific name: Colocasia tonoimo Nakai) is a plant of the genus Colocasia in the family Araceae and is cultivated everywhere. The leaves are shield-shaped, 40-50 cm long and 25-30 cm wide; the flowers are yellow with purple top, and the flowering period is from July to September. Tubers, petioles and inflorescences can all be used as vegetables.

Morphological characteristics:

The tubers are thick and edible; there are several lateral corms, obovate, with several stalks, and brown fibrous roots on the surface, which are also edible. Leaves 1-5, extracted from the top of the tuber, 1-1.2 meters high; petioles are cylindrical, tapering upward, purple-brown; leaves are shield-shaped, ovate-arrow-shaped, dark green, with a curved base, thick lateral veins, and wavy edges , 40-50 cm long and 25-30 cm wide. The inflorescence stalk is single, the exposed part is about 12-15 cm long and 1 cm thick, the apex is dark green, and the rest is the same color as the petiole. The spathe tube is 4.5-7.5 cm long and 2-2.7 cm thick, with several vertical ribs, green or purple, constricting upward and turning white; the eaves are thick, sweeping into an angle, 19-20 cm long, golden yellow, The base is open in front, about 5 cm long and 1.5-2.5 cm thick.

The spadix is ??bisexual: the female inflorescence at the base is 3-4.5 cm long and 1.2 cm thick. There are rod-shaped sterile neutral flowers between the ovaries. The sterile male inflorescence is 1.5-2.2 cm long and 4-7 cm thick. mm, flowers are yellow with purple top; male inflorescences are 3.5-5.7 cm long, 6-8 mm thick, male flowers are yellow; appendages are angular, 2 cm long, 0.4 cm thick, with fine grooves. Ovary green, about 1 mm long, somewhat laterally compressed, stigma umbilicus-shaped, yellow-green, 4-5 lobed, 1-loculed, lateral placenta 5, ovules numerous, 2-row, green or transparent, semi- Opposite or nearly upright, ovate, integument 2-layered, beaded stalk curved. The sterile neutral flowers in the female inflorescence are yellow, club-shaped, truncated, 3 mm long and 1 mm thick. The male flowers are obovate, light green, truncated at the top, with a longitudinal chamber at the edge, and the top hole is split. Flowering period is July-September.