LEAVES

By: Ara Shane G. Ajoc BS-Enviornmental Science

LEAF SHAPE

LEAF BASE

LEAF MARGIN

LEAF SHAPES

Leaf morphology• Leaf shapes

• Angiosperm• Ovate

Leaf morphology• Leaf shapes

• Angiosperm• Obovate

Leaf morphology• Leaf shapes

• Angiosperm• Cordate

Leaf morphology• Leaf shapes

• Angiosperm• Lanceolate

Leaf morphology• Leaf shapes

• Angiosperm• Linear

Leaf morphology• Leaf shapes

• Angiosperm• Deltoid

Leaf morphology• Leaf margins

• Angiosperm• Entire

Leaf morphology• Leaf margins

• Angiosperm• Serrate

Leaf morphology• Leaf margins

• Angiosperm• Sinuate

Leaf morphology• Leaf margins

• Angiosperm• Lobed

Leaf morphology• Leaf margins

• Angiosperm• Crenate

LEAF BASE

1. CUNEATE – if wedge-shaped or tapering evenly to a narrow acute base as in teak.

2. ACUTE – if shaped like an acute angle but not attenuated apex as in almaciga

• 3. OBTUSE – if forming an obtuse angle or an angle of more than 45° but not more than 90° as in caimito.

4. ROUNDED– if like a full sweeping arc as in narra.

5. TRUNCATE – if abruptly cut

off transversely and forming an angle of approximate 180° as in bo tree.

6. CORDATE – if heart-shaped like alim.

7. OBLIQUE– if both the unequal sides of the blade meet at almost the same level at the base as in ipil.

8. INEQUILATERAL– if with two sides of the base unequal but not terminating at almost the same level as in alupag.

9. AURICULATE – if with ear-like appendages formed by the two projecting sides of the base as in gabi.

10. SAGGITATE – if arrow- shaped or with auricles turned inwards.

11. HASTATE– if halberd-

shaped or with auricles turned inwards as in baging-tigre.

12. DECURENT– if base of the

blade appears to run down the stem as in kusibeng.

LEAF MARGIN

1. ENTIRE – if smooth or without lobes or teeth, it follows a continuous, unbroken smooth lines as in narra.

2. REPAND – if undulate or slightly wavy line as in lago.

3. SINUATE – if deeply or

strongly wavy as in amugis.

4. CRENATE– if blunt to rounded teeth as in tuai.

6. DENTATE – with teeth pointing outward as in baho-baho.

5. SERRATE – with saw- toothed or with sharp teeth pointing towards the apex as in agosip.

7. REVOLUTE – if margins rolled under as in Southern lanete.

8. LOBED – if divided into lobes that are separated by rounded sinuses which extends not more than halfway to the midrib as in marang banguhan.

9. CLEFT – if divided into lobes and separated by narrow or acute sinuses which extends more than halfway to the midrib as in rimas.

10. PARTED – if divided by sinuses which extends nearly to the midrib.

12. DOUBLY SERRATE – if teeth

margins are again serrated as in papua.

11. DOUBLE CRENATE – if twice crenated.

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