the primary photosynthetic organ of a plant. leaves capture light energy, exchange gases (CO2 in, O2 out), and transpire water — collectively driving the carbon cycle and atmospheric composition
leaf morphology varies enormously: simple vs compound, alternate vs opposite, entire vs serrated margins. these traits are key identifiers in species classification and are documented in the plant/features section of each species page
many medicinal and culinary applications use leaves specifically. herbs are defined by leaf use. tea, moringa oleifera powder, and leafy vegetables deliver concentrated phytochemicals through leaf tissue
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