New Distribution Record and Regional Characteristics of Arisaema utile Hook. f. ex Schott in Sichuan Province

Arisaema utile Hook. f. ex Schott belongs to Araceae and is distributed in the Himalayan ranges of Qinghai-Tibet Plateau, Gaoligong Mountains and Xueshan Mountains in western Yunnan province. It is distinguished from other species by the red edge of its three leaflets. This paper recorded the new distribution of Arisaema utile in Wanba and Hongba township of Jiulong county, Sichuan province, which is in the south section of Great Snow Mountains and a tributary of Dadu River. The vegetation types and companion species in its habitats were described, and the reasons for its discontinuous distribution were discussed.