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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".
whole leaf: Being divided by clefts; may be pinnately lobed or palmately lobed: lorate: loratus: whole leaf: Having the form of a thong or strap lyrate: lyratus: whole leaf: Shaped like a lyre, pinnately lobed leaf with an enlarged terminal lobe and smaller lateral lobes. See also List of lyrate plants. mucronate: mucronatus: leaf tip
A frond is a large, divided leaf. [1] In both common usage and botanical nomenclature, the leaves of ferns are referred to as fronds [ 2 ] and some botanists restrict the term to this group. [ 3 ] Other botanists allow the term frond to also apply to the large leaves of cycads , as well as palms ( Arecaceae ) and various other flowering plants ...
Doubly pinnate; e.g. a compound leaf with individual leaflet s pinnately divided. bipinnatisect A pinnatisect leaf with deeply dissected segments. bisexual Bearing both male and female reproductive organs; usually, flowers with both stamen s and carpel s; synonymous with hermaphrodite, synoecious, and monoclinous.
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.
The alternate leaves are usually divided into a petiole and a leaf blade. The smooth or hairy leaf blade is simple or one to two-pinnate. The leaflets are lobed three to eleven times. The leaf margin is smooth to roughly serrated. The lower leaves are 38 to 127 centimetres (15 to 50 inches) long and 25 to 64 cm (10 to 25 in) inches wide.
Petiole – a leaf stalk supporting a blade and attaching to a stem at a node. Petiolule - the leaf stalk of a leaflet. Pulvinus – the swollen base of a petiole or petiolule, usually involved in leaf movements and leaf orientation. Rachilla – a secondary axis of a multiply compound leaf. Rachis – main axis of a pinnately compound leaf.
Grevillea candelabroides is a shrub that typically grows to a height of 2–4 m (6 ft 7 in – 13 ft 1 in). Its leaves are pinnately divided, 130–260 mm (5.1–10.2 in) long, with seven to fourteen linear lobes 50–190 mm (2.0–7.5 in) long and 0.7–1 mm (0.028–0.039 in) wide with the edges rolled under.