Size and Chemistry | SEEDS
The range of seed size is extreme more than nine orders of magnitude. The largest known seed is that of the double coconut (Lodoicea maldivica); the seed and fruit together weigh as much as 27 kilograms. At the other end of the scale, the dustlike seeds of some orchids, begonias, and rushes weigh only about […]

Structure | SEEDS
Although the characteristics of different plant seeds vary greatly, some structural features are common to all seeds. Each seed contains an embryo with one, two, or several cotyledons. In angiosperm seeds, the embryo may have either one or two cotyledons. Angiosperms with one cotyledon are plants are called monocots, those with two cotyledons are called […]