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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". A similar term is pectinate, which refers to a comb-like arrangement of parts (arising from one side of an axis). The term contrasts somewhat with palmate, in which the parts or structures radiate out from a common point. Wikipedia does not have an article with this exact name. ... Wiktionary (from wiki and dictionary) is a multilingual, Web-based project to create a free content dictionary, available in over 150 languages. ... Two feathers Feathers are one of the epidermal growths that form the distinctive outer covering, or plumage, on birds. ... Divisions Green algae Chlorophyta Charophyta Land plants (embryophytes) Non-vascular plants (bryophytes) Marchantiophyta—liverworts Anthocerotophyta—hornworts Bryophyta—mosses Vascular plants (tracheophytes) †Rhyniophyta—rhyniophytes †Zosterophyllophyta—zosterophylls Lycopodiophyta—clubmosses †Trimerophytophyta—trimerophytes Pteridophyta—ferns and horsetails Seed plants (spermatophytes) †Pteridospermatophyta—seed ferns Pinophyta—conifers Cycadophyta—cycads Ginkgophyta—ginkgo Gnetophyta—gnetae Magnoliophyta—flowering plants... Animalia redirects here. ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... A comb A comb for people with hair loss. ... In botany, the following terms are used to describe the shape of plant leaves: cordate leaf Acicular: slender and pointed Alternate (alternifolia): Arranged alternately Bipinnate (bipinnata): Each leaflet also pinnate Cordate (cordata): Heart-shaped, stem attaches to cleft Cuneate: Triangular, stem attaches to point Deltoid: Triangular, stem attaches to side...

A pinnate frond of the fern, Blechnum appendiculatum.

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. Many palms (notably the feather palms) and most cycads and grevilleas have pinnately divided leaves. Most species of ferns have pinnate or more highly divided fronds, and ferns the leaflets are typically referred to as "pinnae" (singular "pinna"). Plants with pinnate leaves are sometimes colloquially called "feather-leaved". Download high resolution version (600x800, 106 KB)Example of a pinnate fern frond showing the upper and lower surfaces (the latter with sori). ... Download high resolution version (600x800, 106 KB)Example of a pinnate fern frond showing the upper and lower surfaces (the latter with sori). ... Genera Many; see list of Arecaceae genera Arecaceae (also known as Palmae or Palmaceae), the palm family, is a family of flowering plants, belonging to the monocot order Arecales. ... Families Cycadaceae cycas family Stangeriaceae stangeria family Zamiaceae zamia family Leaves and male cone of Cycas revoluta Cycads are an ancient group of seed plants characterized by a large crown of compound leaves and a stout trunk. ... Species See text Grevillea is a diverse genus of evergreen flowering plants in the protea family (Proteaceae). ... Classes Psilotopsida Equisetopsida Marattiopsida Pteridopsida (Polypodiopsida) A fern is any one of a group of about 20,000 species of plants classified in the phylum or division Pteridophyta, also known as Filicophyta. ... A fern with simple (lobed or pinnatifid) blades, the dissection of each blade not quite reaching to the rachis. ...

pinnatifid – 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.

The fish, Platax pinnatus, is known as the pinnate spadefish or pinnate batfish.