Pieris taiwanensis Hayata is a species of the genus Rhododendron. It is an evergreen shrub 1-3m high, bark smooth, with a main growing environment on the sunny slope. There are ten species of plants in the world, and there is only one species in Taiwan. It is a small number of native species of Taiwan that have been distributed from low altitude to more than 3,000 meters. The flowering period is from March to June.
The leaves are coriaceous, oblanceolate to lanceolate-oblong. The leaves are green above, pale beneath, the midrib strongly raised above, slightly raised beneath, the foliation are pink or red, and the leaves are fasciculate. The flower is about one centimeter long and is a white petal with a semi-expanded lantern-like shape and a large inflorescence cymose or raceme.
Taiwan's horse drunk wood is poisonous, and the horse will faint like a drunk, so call it.