The leaf is the principal energy-capturing and food-producing organ of plants. Leaves are attached to and supported by the plant stem, which also provides the leaf with water and inorganic nutrients from the soil. They usually have a flattened surface,...

Leaves enough, but few grapes. (American) The fall of a leaf is a whisper to the living. (Russian) The leaves fall before the tree dies. (French) The more shoots, the more leaves. (Malay) Though a tree may grow ever higher, the falling leaves return to...

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Leaves are often the most conspicuous part of any plant. Leaves vary tremendously in shape and in size: from the tiny leaves (less than 1 millimeter across) of the floating aquatic plant duckweed to the giant leaves (more than 10 meters in length) of...

In botany, a leaf is an above-ground plant organ specialized for photosynthesis. For this purpose, a leaf is typically flat (laminar) and thin, to expose the cells containing chloroplast (chlorenchyma tissue, a type of parenchyma) to light over a broad...

NFL Notes Leaf, Flutie, Grbac become free agents Associated Press Thursday, March 1, 2001 Quarterbacks Ryan Leaf, Doug Flutie and Elvis Grbac became free agents and three-time Super Bowl champion Ken Norton Jr. was released Wednesday as NFL teams sliced...

Byline: TOM MCGHIE A seasonal menace returns and rail bosses roll out their latest weapons: satellite tracking, special trains and two-man hit squads with brooms Teams of 'leaf-busters' will be on round-the-clock alert this autumn as Network Rail invests tens of...

How it works "Artichoke-leaf extract improves the liver's eliminative function," says Amelia Hirota, D.Ac., Dipl. C.H., an acupuncturist, herbalist, and clinician at Center of Balance in East Greenwich, R.I. The acid components in the extract stimulate production of bile, a detergentlike fluid responsible for...

Nik Antropov scored two goals in the third period to lead the Toronto Maple Leafs to a 4-1 victory over the Carolina Hurricanes on Tuesday night.Bates Battaglia also scored, Tomas Kaberle had an empty-net goal and an assist and Andrew Raycroft stopped 28 shots for...

Essay provides overview of general leaf structure and functions. To perform its function the leaf must contain chlorophyll and other photosynthetic pigments arranged in such a way that they can absorb light. A leaf must also absorb carbon dioxide and dispose of the waste product oxygen and have a water supply and be able to export manufactured carbohydrate to the rest of the plant.

Essay explains why leaves change colors in the fall.