costusroot: annual herb of the eastern Himalayas (Kashmir) having purple florets and a fragrant root that yields a volatile oil used in perfumery and for preserving furs
vascular plant: green plant having a vascular system: ferns, gymnosperms, angiosperms
scorpion shell: any of numerous tropical marine snails that as adults have the outer lip of the aperture produced into a series of long curved spines