Seed are sometimes sold commercially while still enclosed within the hard wall of the fruit, which must be split open to reach the seed. Different groups of plants have other modifications, the so-called stone fruits (such as the peach) have a hardened fruit layer (the endocarp) fused to and surrounding the actual seed. Nuts are the one-seeded, hard-shelled fruit of some plants with an indehiscent seed, such as an acorn or hazelnut. Seeds are produced in several related groups of plants, and their manner of production distinguishes the angiosperms ("enclosed seeds") from the gymnosperms ("naked seeds"). Angiosperm seeds are produced in
Stars named after people generally considered disused—some sources listing them as "traditional". It is possible, though unlikely, that further traditional names are in fact hidden names such as these, not yet identified; etymologies for many star names are not currently known. Whilst many private companies will offer the "right" to name a star, for a fee, they have no legal standing to assign any star a name, and can offer no guarantee of the name being noted. The IAU does not recognize this practice and its website uses the word charlatanry in this context. Stars named after people Over the past few centuries, a