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SAFE HANDS Leaf (Phyllopodium) Dorsiventral Dicot Isobilateral Monocot Types of leaves Cotyledonary – fleshy due to food Hypsophylls or Bract leaves-

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Presentation on theme: "SAFE HANDS Leaf (Phyllopodium) Dorsiventral Dicot Isobilateral Monocot Types of leaves Cotyledonary – fleshy due to food Hypsophylls or Bract leaves-"— Presentation transcript:

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2 SAFE HANDS Leaf (Phyllopodium) Dorsiventral Dicot Isobilateral Monocot Types of leaves Cotyledonary – fleshy due to food Hypsophylls or Bract leaves- contain inflorescence at axil. Scaly- Non green or dry – bamboo. Prophylls –the first form leaves. Cataphylls – non green underground scaly protect but in axil. Sporophyll- reproductive. Represent flower. Foliage leaves – Photosynthetic.

3 SAFE HANDS Part of leaves Leaf base Lamina Petiole Margin Apex Axillary bud

4 SAFE HANDS Stipules Types according to their time period- Caducous- detach before the leaf unfolds- Michelia(Champa) Deciduous- detach after unfold of leaf- cassia Persistent – attached permanently - Hibiscus. Types according to their structure and location - Free lateral – two free stipules on both side of leaf base- Hib. Adnate – two lateral attached to petiole -rose Ochreate – two form hollow tube surrounds node. Interpetiolar – Between petioles of opposite leaves- Anthocephalalus Intrapetiolar – between petiole and stem. Foliaceous – two green leaf like. Tendrilar- modified into thin tendrils – Smilax Bud and spiny

5 SAFE HANDS Petiole (Mesopodium) Winged Orange Tendrilla r Nepenthes Phyllode Acacia Floating Echornia

6 SAFE HANDS Lamina (epipodium) Parallel Monocot Reticular Dicot Venation Convergent Wheat Divergent Palms Unicostate/Pinnat e Peepal Multicostat e\Palmat e Convergent Ber Divergent Castor

7 SAFE HANDS Furcate

8 Vernation & ptyxis Vernation- arrangement in relation to each other in the bud condition Ptyxis – manner of folding of an individual leaf in bud condition Circinatie- rolled from apex to base- cycas. Plicate – folded lengthwise – fan palm Conduplicate – folded over midrib – gauva Crumpled- irregularly folded – cabbage Involute – margin folded on upper side- colocasia rovolute – Margins rolled on lower surface Phyllotaxy & its types Modification

9 SAFE HANDS Phyllotaxy Alternative spiral- Mango, Hibiscus. Opposite – two types- 1. Opposite superposed – Eugenia. 2. Opposite decussate.- Calotropis. Whorled- Nerium Spiral – Hibiscus Mosaic- Acalypha indica.

10 SAFE HANDS Types of Leaves (Depends of incision of lamina) SimpleCompound Pinnately compd- Incision toward midrib Palmately compd- Incision of lamina toward the base of leaf connect to the tip of petiole Unipinnate- Pari- Imparipinnate Bipinnate-Tripinnate-Decompound

11 SAFE HANDS Palmately compd- Incision of lamina toward the base of leaf connect to the tip of petiole Unifoliate- citrus Bifoliate Bignonia Trifoliate Oxalis Quadrifoliate Paris quadrifolia Multifoliate Bambax

12 SAFE HANDS Modification of leaf 1.Leaf tendrils- smilax. 2.Leaf spines- Zyzypus. 3.Leaf hooks- Bignonia. 4.Phyllodes- Acacia ariculiformis. 5.Leaf bladders – Utricularia (bladderwort), Pitcher. 6.Succulent – Aloe. 7.Scale leaves- Casuarina 8.Coloured leaf – for pollination – Euphorbia. 9.Leaf root- for balancing – salvinia. 10.Leaf tentacle- Drosera Functions of leaf

13 SAFE HANDS Peduncle (Floral axis) Simple (Unbranched) – flowers born on rachis Compound (Branched) - flowers born on rachises Solitary single - Hibiscus Inflorescence may be – Terminal- single flower at the apex Axillary – flower in the axil of a leaf Intercalary – single flower between the floral axis

14 SAFE HANDS Axillary Racemos e Indefinite Cymose Definite MixedSpecial

15 SAFE HANDS Racemose (Indefinite) Indefinite axis Flowers in a acropetal order. Opening of flower is centripetal. Peduncle Unbranched -Simple recemose. Peduncle Branched – compound recemose.

16 SAFE HANDS Types of Racemose inflorescence Main axis elongated Raceme Spike. Spikelets. Catkin. Spadix. Main axis shortened Corymb. Umbel Main axis flat Concave Convex

17 SAFE HANDS Raceme Simple Compd/ Penicle SpikeSpikelets Rice Rachilla Catkin (Amentum) Oak, Mulbery.

18 SAFE HANDS Spadix Banana, colocasia, Spathe Corymb Iberis, casia Umbel Centella

19 SAFE HANDS Capitulum Helianthus

20 SAFE HANDS Cymose


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