Pinnate is a term used to describe feather-like or multi-divided features arising from both sides of a common axis in plant or animal structures, and comes from the Latin word pinna for "feather". Feathers are one of the epidermal growths that form the distinctive outer covering or Plumage, on Birds They are considered the most complex integumentary structures Plants are living Organisms belonging to the kingdom Plantae. Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. A similar term is pectinate, which refers to a comb-like arrangement of parts (arising from one side of an axis). A comb is a device made of solid material generally flat always toothed and is used in hair care for straightening and cleaning hair or other fibers The term contrasts somewhat with palmate, in which the parts or structures radiate out from a common point. In Botany, the following terms are used to describe the shape of plant leaves: Acicular ( acicularis) Slender and pointed needle-like
Plants
Botanically, the term describes an arrangement of discrete structures (such as leaflets, veins, lobes, branches, or appendages) arising at multiple points along a common axis. For example, once-divided leaf blades having leaflets arranged on both sides of a rachis are pinnately compound leaves. Rachis is also the alternate spelling of Ratchis, king of the Lombards 744-749 Many palms (notably the feather palms) and most cycads and grevilleas have pinnately divided leaves. Arecaceae or Palmae (also known by the name Palmaceae, which is taxonomically invalid or commonly palm tree) the palm family is a family of Flowering Cycads are a group of Seed plants characterized by a large crown of compound leaves and a stout trunk. Grevillea is a diverse Genus of about 360 species of Evergreen Flowering plants in the protea family Proteaceae, native to Most species of ferns have pinnate or more highly divided fronds, and ferns the leaflets are typically referred to as "pinnae" (singular "pinna"). A fern is any one of a group of about 20000 Species of Plants classified in the phylum or division Pteridophyta, also known as Filicophyta A frond is a large Leaf with many divisions to it and the term is typically used for the leaves of palms Ferns or Cycads A frond is Plants with pinnate leaves are sometimes colloquially called "feather-leaved".
pinnatifid and pinnatipartite – leaves with pinnate lobes that are not discrete, remaining sufficiently connected to each other that they are not separate leaflets.
paripinnate – pinnately-compound leaves in which leaflets are born in pairs along the rachis without a single terminal leaflet; also called "even-pinnate".
imparipinnate – pinnately-compound leaves in which there is a lone terminal leaflet rather than a terminal pair of leaflets; also called "odd-pinnate".
bipinnate – pinnately-compound leaves in which the leaflets are themselves pinnately-compound; also called "twice-pinnate".
tripinnate – pinnately-compound leaves in which the leaflets are themselves bipinnate; also called "thrice-pinnate".
tetrapinnate – pinnately-compound leaves in which the leaflets are themselves tripinnate.
Animals
In animals, pinnate is used to describe feather-like structures:
- Some muscles can be unipinnate or bipinnate muscles
- The fish, Platax pinnatus, is known as the pinnate spadefish or pinnate batfish. A modification of the Unipennate condition is found where oblique fibers converge to both sides of a central tendon these are called bipennate, and an example is afforded in
See also
In Botany, the following terms are used to describe the shape of plant leaves: Acicular ( acicularis) Slender and pointed needle-likeDapyx Software network: MP3 Explorer | Ebook Manager | Zenithic