Sean Houtman schreef
The cotyledons of a seed are often adapted for storage purposes, and not
as efficient photosynthesis organs. There are some cases where the
cotyledons
are good at photosynthesis, such as _Ipomoea_, and some other cases where
the
cotyledons photosynthesize and the leaves do not (to any appreciable
extent) such as _Cuscuta_. In general, cotyledons confer some advantage to
the
plant by supplying stored nutrients as well as often giving a little bit of
photosynthetic product as well.

Sean

+ + +
A very narrow view, disregarding all plants with hypogeal germination. To
say nothing of [...]
PvR