The height of goldfish grass is high, about 20 to 70 cm. It is a perennial herb, glabrous under the stem and sometimes lignified.
The height of the plant is about 40 to 60 cm. It is an annual herb with glandular hairs on the stem and many branches on the stem.
Goldfish grass flowers from the top, racemes, pedicels 5 to 7 mm long, calyx length and pedicels about the same length, flowers of various colors, there are red, purple, white, etc., flowering in June to September.
The flower is single, the shape of the flower is lip, the peduncle is thin and long.
The upper leaves of goldfish grass are alternate and the lower ones are opposite. The shape of the leaves is oblong lanceolate, about 2 to 6 cm long, and the petioles are very short.
The leaves of the bird are in the shape of lanceolate strips without petioles.
