Leaf

A leaf is an organ of a vascular plant and is the principal lateral appendage of the stem. The leaves and stem together form the shoot.Foliage is a mass noun that refers to leaves collectively.

Typically a leaf is a thin, dorsiventrally flattened organ, borne above ground and specialized for photosynthesis. Most leaves have distinctive upper (adaxial) and lower (abaxial) surfaces that differ in colour, hairiness, the number of stomata (pores that intake and output gases) and other features. In most plant species, leaves are broad and flat. Such species are referred to as broad-leaved plants. Many gymnosperm species have thin needle-like leaves that can be advantageous in cold climates frequented by snow and frost. Leaves can also have other shapes and forms such as the scales in certain species of conifers. Some leaves are not above ground (such as bulb scales). Succulent plants often have thick juicy leaves, but some leaves are without major photosynthetic function and may be dead at maturity, as in some cataphylls, and spines). Furthermore, several kinds of leaf-like structures found in vascular plants are not totally homologous with them. Examples include flattened plant stems (called phylloclades and cladodes), and phyllodes (flattened leaf stems), both of which differ from leaves in their structure and origin. Many structures of non-vascular plants, and even of some lichens, which are not plants at all (in the sense of being members of the kingdom Plantae), look and function much like leaves. The primary site of photosynthesis in most leaves (palisade mesophyll) almost always occurs on the upper side of the blade or lamina of the leaf but in some species, including the mature foliage of Eucalyptus palisade occurs on both sides and the leaves are said to be isobilateral.

Leaves (Icelandic band)

Leaves are an Icelandic alternative rock band formed in 2000.

History

Vocalist Arnar Gudjonsson was formerly the guitarist with Mower, and he was joined by Hallur Hallsson (bass guitar), Arnar Ólafsson (guitar, accordion), Bjarni Grímsson (drums), and Andri Ásgrímsson (keyboards). Late in 2001 they played with Emiliana Torrini and drew early praise from the New York Times. They came to prominence in 2002 with their single "Race" (which reached number 66 in the UK Singles Chart), and début album, Breathe, drawing comparisons to groups such as Coldplay, Muse,The Verve and Doves. The album was released in the UK first to positive reviews, reaching number 71 in the UK Albums Chart, then was re-released in the United States, and a tour of both the UK and the U.S. followed. Their second album, The Angela Test, was released in 2005 and their third album, We Are Shadows, was released in 2009.

The name of the band refers to Nick Drake's first album Five Leaves Left.

Members

Leaf (disambiguation)

A leaf is an organ of a vascular plant.

Leaf or Leaves may also refer to:

Material

People

Music

Organisations