any member of the order Coniferales, woody plants that bear their seeds and pollen on separate, cone-shaped structures of hard or papery scales arranged in spirals or whorls around an axis. This arrangement of a naked, exposed seed is in contrast with the angiosperms, the seeds of which are surrounded by a maturing ovule., kaks paljasseemnetaimede klassi (Coniferopsida ja Taxopsida); ... kokku on okaspuid u 580 liiki, paljasseemnetaimede klass, kuhu kuuluvad pms igihaljad ühekojalised tuultolmlejad puud ja põõsad. Lehed on enamasti nõeljad või lineaalsed (okkad).