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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 ...
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.
Compound leaves may be pinnate with pinnae (leaflets) on both sides of a rachis (axis), or may be palmate with multiple leaflets arising from a single point. [1] Leaf structure is described by several terms that include: Bipinnate leaf anatomy with labels showing alternative usages A ternate compound leaf with a petiole but no rachis (or rachillae)
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.
Other botanists allow the term frond to also apply to the large leaves of cycads, as well as palms and various other flowering plants, such as mimosa or sumac. [ 4 ] [ 5 ] "Frond" is commonly used to identify a large, compound leaf, but if the term is used botanically to refer to the leaves of ferns and algae it may be applied to smaller and ...
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 in ferns, the leaflets or segments are typically referred to as "pinnae" (singular "pinna"). Plants with pinnate leaves are sometimes colloquially called "feather-leaved".
It has shiny green elliptical leaves up to 18 cm (7.1 in) long, and prominent orange-red inflorescences that appear from August to October, followed by rectangular woody seed pods that ripen in February and March. Juvenile plants have large (up to 25 cm (9.8 in) long) deeply lobed pinnate leaves.
Syringa pinnatifolia is an open, upright, deciduous shrub with exfoliating bark, unusually pinnate, dark-green leaves with lance-shaped, dark green leaflets, and panicles of fragrant, lilac- to pink-flushed, white flowers in spring. [3] It grows between 8ft to 12ft (2.5-4m) high. [4]