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
Stele of the Vultures vultures after which the stele is named, with the severed heads of the enemies of Lagash in their beaks. The second register shows soldiers marching with shouldered spears behind the king, who is riding a chariot and holding a spear. In the third register, a small part of a possibly seated figure can be seen. In front of him, a cow is tethered to a pole while a naked priest standing on a pile of dead animal bodies performs a libation ritual on two plants spouting from vases. Left of these scenes is a pile of naked bodies surrounded by