LEAF MORPHOLOGY. leaf sheath Dicotyledonous leaf Monocotyledonous leaf leaf apex leaf margin...

LEAF MORPHOLOGY

leaf sheath

Dicotyledonous leaf Monocotyledonous leaf

leaf apex

leaf margin

blade/lamina

leaf vein

petiole

stipule

ligule

auricle

abscission zone

midrib

lamina

cylindrical grooved

pulvinus

swollen leaf base

pseudobulb

winged petiole

phyllode

phyllode

PETIOLE

PHYLLODES

auriculate

perfoliateconnate

SESSILE LEAVES (without petiole)

SESSILE LEAVES

pinnately netted

palmately netted

parallel

penni parallel

DICOT

reticulate/ netted

MONOCOT

LEAF VENATION

SIMPLE LEAVES

palmately lobed pinnately lobed

multifoliate

leaflet

petiolule

petiole

bifoliate

trifoliate

simple leaf(palmately - lobed)e.g. ubi gajah

PALMATE LEAVES

odd pinnate/imparipinnate

bipinnate

tripinnate

petiolule

even pinnate/paripinnate

rachis

rachilla

leaflet

rachis

petiole

PINNATE LEAVES

Odd pinnate

Palmate (multifoliate)

alternate

spiral

opposite

whorled

LEAF ARRANGEMENT (PHYLLOTAXY)

opposite

whorled

spiralalternate

interpetiolar stipule

spathulate

LEAF SHAPES

oblong lanceolate elliptic ovate obovate

cordateacicularlinearreniform

peltate orbiculate oblanceolate rhombicobcordate

obdeltoiddeltoidcuneate

hastatesagittate

LEAF SHAPES

entireundulate (sinuate) incised retrorse crenate

denticulatedentateserrulateserratecrenulate

LEAF MARGINS

LEAF APICES

acuminate acute apiculate aristate caudate cirrhose

obcordatemucronulatemucronateemarginatecuspidatecleft

obtuse retuse rounded spinose truncate

A AB

C B B C

C

A = CURLED, FLEXOUS B = STIFF, STRAIGHT C = NOTCHED

C

LEAF BASES

attenuate cuneateauriculate cordate sagittate

obtusetruncateroundedunequal (oblique)

hastate