17-letter words containing p, i, l, e, o, n
- winter heliotrope — a creeping perennial, Petasites fragrans, related to the butterbur, having lilac to heliotrope-coloured flowers smelling of vanilla: found chiefly on road verges
- zonal pelargonium — a pelargonium whose leaves are marked with concentric circles of a different colour to the rest of the leaf