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[citation needed] Leaves may be simple, with a single leaf blade, or compound, with several leaflets. 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:
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.
Note that the two names together (not just the second name) constitute the species name. bipinnate Doubly pinnate; e.g. a compound leaf with individual leaflet s pinnately divided. bipinnatisect A pinnatisect leaf with deeply dissected segments. bisexual
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.
Leaf Base Shape: Semiamplexicaul – the leaf base wraps around the stem, but not completely. Leaf Blade Apex: Acuminate – narrowing to a point (a term used for other structures, too). Acute – with a sharp, rather abrupt ending-point. Acutifolius – with acute leaves. Attenuate – tapering gradually to a narrow end. Leaf Blade Margins:
Cyanothamnus anemonifolius is an erect shrub that grows to a height of 2.5 m (8 ft 2 in) with pimply glands on its branches. The leaves are usually pinnate, sometimes simple or bipinnate, mostly 4–18 mm (0.16–0.71 in) long and 2–25 mm (0.079–0.98 in) wide in outline on a petiole usually 2–9 mm (0.079–0.35 in) long.
The leaves are arranged alternately along the stems and are simple or pinnate. The flowers have three to seven sepals but that fall of as the flowers mature, but no petals. There are six to sixteen stamens (except in female flowers), the filaments shorter than the anthers, the style is threadlike and the ovary in female flowers has two to six ...
An evergreen woody vine. Stems with swollen nodes. Leaves opposite, stalked, simple, pinnately veined, margin entire. Flowers unisexual, borne in whorled, spike-like cones, arranged in lax, cymes. Male spikes have collars closely arranged and ± hiding axis (less often somewhat laxly arranged), each collar with 20–80 flowers, often also with ...