Leaf Morphology Flashcards
1
Q
Parts of a grass leaf?
A
• Grass leaf – some specialist terminology: – sheath
– blade – ligule – auricle
2
Q
What are some major modifications in leaves?
A
- Major leaf modifications:
- tendrils – climbing support
- phyllodes - acacias
- bracts – ‘false petals’ – poinsettia – spine (leaf)/thorn (stem)/prickle (epidermal)
- protection – bud scales, spines
- water storage – some succulents • food storage – bulbs
- traps – carnivorous plants
- propagation – ‘mother of millions’
3
Q
Tendrils
A
• Vitistendril: – extra-axillary lateral bud, or – modified inflorescence inhibited from completing floral development by GAs
4
Q
What are Insectivorous plants?
A
• Insectivorous plants • Usually swampy, low fert. ( esp. N) areas • 4 types: • Pitcher plants – some leaves normal – some vase-like, flap above open end – nectar-secreting glands near open end – attracts insects – some fall into tube, liquid at base – tube walls waxy, downward pointing hairs – insect digested by enzymes
5
Q
Leaf Morphology?
A
• Leaf morphology –Leaf arrangement –Leaf structure • Simple • Compound –Simple, Trifoliolate, Palmate, Pinnate, Bipinnate, Tripinnate
6
Q
Leaf Arrangement?
A
• Leaf arrangment
– alternate – opposite – whorled
7
Q
Leaf dissection?
A
• Leaf dissection – simple – compound • trifoliolate (not trifoliate!!!) • palmate • pinnate • bipinnate • tripinnate
