Penniselle is an annual herb with a height of about 9 to 60 cm. The plant height is quite different. The stem is relatively upright, without the distribution of small hairs, with small ribs on it.
Patrinia villosa is a perennial herb with a height of about 10 to 30 cm. Its stem is erect or slanting.
The leaves of penniselle are oblong, with a length of about 3 to 5 cm, a width of about 1 to 1.5 cm, and a petiole of about 1 to 3 cm.
The leaves of Patrinia villosa are strip lanceolate, inverted lanceolate or strip, about 7 to 20 cm in length, about 0.5 to 2 cm in width, and the color of the leaves is gray green.
The color of the flower is white, the diameter is about 2 mm, the pedicel is very thin.
The flower color of Patrinia villosa is yellow, light yellow, white or light purple.
