noun
Pertya scandens (a species of aster)
A deciduous shrub in the Asteraceae family, native to Japan. The name literally means 'Kōya broom', as its branches were traditionally used to make brooms.
こうやぼうきは秋に白い花を咲かせます。
Pertya scandens blooms with white flowers in autumn.
山道でこうやぼうきを見
I found a Pertya scandens along the mountain path.
The name こうやぼうき (高野箒) literally means 'Kōya broom', referring to Mount Kōya (高野山) and the traditional use of its branches for making brooms. The exact historical derivation is uncertain.