winter crookneck: any of various plants bearing squash having hard rinds and elongated recurved necks
vascular plant: green plant having a vascular system: ferns, gymnosperms, angiosperms
strophanthin: a bitter and very toxic glycoside derived from plants of the genus Strophanthus; in moderate doses it is a cardiac stimulant but in larger doses it is a powerful poison; used in Africa as an arrow poison