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The two main classes of compound leaf morphology are palmate and pinnate. For example, a hemp plant has palmate compound leaves, whereas some species of Acacia have pinnate leaves. The ultimate free division (or leaflet) of a compound leaf, or a pinnate subdivision of a multipinnate leaf is called a pinnule or pinnula.
paripinnate: pinnately compound leaves in which leaflets are borne 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".
The leaves are alternate and are a shiny dark green on top and light brown on the bottom. They are simple leaf types with pinnate venation. The leaves are ovate and range in length from 3 to 11 cm (1.2 to 4.3 in). The breadth of the leaves ranges from 2 to 5 cm (0.79 to 1.97 in). The leaves are evergreen so they are present year round.
The leaves are pinnate (in the form of bird feathers, pinnae), with a central leaf stalk from which parallel "ribs" emerge from each side of the stalk, perpendicular to it. The leaves are typically either compound (with leaflets emerging from the leaf stalk as "ribs"), or have edges ( margins ) so deeply cut ( incised ) so as to appear compound.
The leaves are simple, pinnate, or bipinnate, and arranged in opposite pairs. The flowers are produced in a capitulum with a ring of broad ray florets and a center of disc florets; flower color varies noticeably between the different species. The genus includes several ornamental plants popular in gardens
Rodgersia nepalensis, T.A.Cope ex Cullen has a truly pinnate leaf, blue-green in EMAK 713, yellowy-green in ED2879. The individual leaflet are about 15mm long and 5mm wide with markedly serrated edges, tipped red brown in EMAK, yellow in ED.
Astragalus bisulcatus is a herbaceous perennial with a thick woody root-stock, growing 30 to 100 cm tall. [4] It has numerous simple stems and long pinnate leaves. The flowers are produced in narrow elongated racemes.
The leaves are pinnate, 110–320 mm (4.3–12.6 in) long and arranged in opposite pairs with seven to eleven egg-shaped to elliptical leaflets. The leaflets are mostly 40–130 mm (1.6–5.1 in) long and 10–32 mm (0.39–1.26 in) wide, the side leaflets sessile or on a petiolule up to 6 mm (0.24 in) long and the end leaflet on a petiolule 8 ...