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Chart illustrating leaf morphology terms. The following terms are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (that is, the leaf blade or 'lamina' is undivided) or compound (that is, the leaf blade is divided into two or more leaflets). [1]
For instance, the parallel venation found in most monocots correlates with their elongated leaf shape and wide leaf base, while reticulate venation is seen in simple entire leaves, while digitate leaves typically have venation in which three or more primary veins diverge radially from a single point. [32] [25] [30] [33]
Narrowing gradually. See also Leaf shape. auricle An ear-shaped lobe, particularly a small, roundish, lateral appendage of a leaf or leaf-like organ. auriculate Attached at the base with ear-shaped appendages (auricle s). See also Leaf shape. autogamous Self-pollinating, self-fertilizing – in flowering plants awn 1. Any long, bristle-like ...
Chart illustrating 61 morphological terms describing leaf shape, margins and venation. While Diliff's mega-panoramas are a hard act to follow, I thought I would throw the metaphorical hat into the ring with this illustration. I created it with the desire to make a richly encyclopedic image/poster with lots of information about leaf morphology.
Sword-shaped (ensiformis) – long, thin, pointed. Trifoliate, ternate (or trifoliolate) (trifoliata) – divided into three leaflets. Tripinnate (tripinnata) – pinnately compound in which each leaflet is itself bipinnate. Truncate (truncata) – with a squared off end. Unifoliate (unifoliata) – with a single leaf. Leaf Base Shape:
Simple leaves are also occasionally present; technically, these are single-leaflet compound leaves. Although some other maples (such as Acer griseum, Acer mandshuricum and the closely related A. cissifolium) have trifoliate leaves, only A. negundo regularly displays more than three leaflets.
The leathery, sessile, simple leaves are elliptical, ovate, linear or lanceolate and wedge-shaped at the base. The leaf blade is dorsiventral, medium-sized to large and disposed oppositely or in a whorl and with entire margin. The leaf venation is pinnate, with numerous veins ending in a marginal vein. Phyllotaxy is whorled i.e. two or more ...
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