noun
orpine; Hylotelephium telephium
A succulent plant with purple flowers, native to Eurasia. The name is a botanical term; in everyday contexts, it may be referred to simply as ベンケイソウ or by its scientific name.
庭にムラサキベンケイソウが咲いている。
Orpine is blooming in the garden.
Refers to the broader genus Hylotelephium or stonecrops in general, while ムラサキベンケイソウ specifies the purple-flowered orpine.
From 紫 (murasaki, 'purple') + 弁慶草 (benkeisō, 'stonecrop'). The name likely refers to the purple color of the flowers.