1、 Blade

Litchi grass leaves are oval oval or elliptic lanceolate, about 2-6 cm long and 0.8-2.5 cm wide, with blunt or acute apex, round or wedge-shaped base, small circular sawtooth on the edge of the leaf, golden yellow gland spots on the back, and pubescence on the veins. The leaves are opposite, easy to fall off or break, and most of the intact leaves shrink or curl

2、 Stem

The stem of litchi grass is square columnar, with a diameter of about 2-8 mm. The surface color is grayish green at the beginning and turns brown at the later stage, and is pubescent

3、 Petals

Lychee grass cymose, inflorescence 10-25 cm long, which will be extended when bearing fruit; Bracts lanceolate, longer or shorter than calyx; Pedicel and inflorescence axis densely pubescent; Calyx is bell shaped with yellowish brown gland spots. Corolla is light red, light purple, blue purple to blue

4、 Fruit

Litchi grass nutlets are inverted ovoid, brown and glandular. The fruiting period is from June to July