Tongoloa arguta sp. nov. A species habitat (Mt. Jianziwanshan, Sichuan, China) B plant in the bush surrounded by snow C plant D–F roots G, H basal leaf, ventral and dorsal view I membranous sheath of basal leaves J middle leaf K upper leaf with membranous petiole L umbel and bract M–O flowers; P–R fruits S mericarp transverse section.