Collective term for dicotyledone hardwood trees (also known as dicots or, more rarely, dicotyls), which are one of the two groups into which all the flowering plants or angiosperms were formerly divided; NB¹: Angiosperms (flowering plants, with seeds enclosed within an ovary (usually a fruit)) and Gymnosperms (with no flowers or fruits; Its "naked" seeds are often configured as cones) are members of the Spermatophytæ (seed plants) family of deciduous wood: ebony (a collective name for various dark types of wood, like Diospyros ebenum, Maba ebenus, &c.), grenadille (Dalbergia melanoxylon), rose-wood (Jacaranda brasiliensis) and teak (Tectona grandis); NB²: Softwood comes from gymnosperm trees. The key difference between angiosperms and gymnosperms is how their seeds are developed. The seeds of angiosperms develop in the ovaries of flowers and are surrounded by a protective fruit; Their flowers can be unisexual (e.g. male flowers and female flowers) or bisexual (i.e. each of the flowers has both male and female parts). Gymnosperm seeds are usually formed in unisexual cones, known as strobili, and the plants lack fruits and flowers.