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
Seeds of Peace of Peace also has opened central offices in Jerusalem and smaller offices in Amman, Lahore, and Mumbai. With the support of Seeds of Peace staff, and growing networks of older "Seeds," Delegation Leaders and parents, the young graduates of the Camp continue activities across borders and within their own communities. Programs for older Seeds—people in their 20s and 30s—are expanding as the organization meets the needs of alumni moving through new phases of life. Regional offices also provide support to the GATHER initiative. Approximately 350 new Seeds graduate from Seeds of Peace every summer. After camp, the organization runs year-round