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LEAF MORPHOLOGY

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leaf sheath Dicotyledonous leaf Monocotyledonous leaf leaf apex leaf margin blade/lamina leaf vein petiole stipule ligule auricle abscission zone midrib lamina

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cylindrical grooved pulvinus swollen leaf base pseudobulb winged petiole phyllode PETIOLE

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PHYLLODES

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auriculate perfoliateconnate SESSILE LEAVES (without petiole)

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SESSILE LEAVES

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pinnately netted palmately netted parallel penni p arallel DICOT reticulate/ netted MONOCOT LEAF VENATION

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SIMPLE LEAVES palmately lobed pinnately lobed

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multifoliat e leaflet petiolule petiole bifoliate trifoliate simple leaf (palmately - lobed) e.g. ubi gajah PALMATE LEAVES

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odd pinnate/imparipinnate bipinnate tripinnate petiolule even pinnate/paripinnate rachis rachilla leaflet rachis petiole PINNATE LEAVES

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Odd pinnate Palmate (multifoliate)

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alternate spiral opposite whorled LEAF ARRANGEMENT (PHYLLOTAXY)

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opposite whorled

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spiralalternate

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interpetiolar stipule

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spathulate LEAF SHAPES oblong lanceolate elliptic ovate obovate cordate acicular linear reniform

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peltate orbiculate oblanceolate rhombic obcordate obdeltoid deltoid cuneate hastatesagittate LEAF SHAPES

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entire undulate (sinuate) incised retrorsecrenate denticulate dentateserrulate serrate crenulate LEAF MARGINS

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LEAF APICES acuminateacuteapiculatearistatecaudatecirrhose obcordat e mucronulat e mucronateemarginatecuspidatecleft obtuse retuseroundedspinose truncate A A B C B B C C A = CURLED, FLEXOUSB = STIFF, STRAIGHTC = NOTCHED C

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LEAF BASES attenuate cuneate auriculatecordate sagittate obtusetruncate rounded unequal (oblique) hastate