Leaf Dorsiventral Dicot Types of leaves (Phyllopodium) Isobilateral Monocot Cotyledonary – fleshy due to food Hypsophylls or Bract leaves- contain inflorescence at axil. Scaly- Non green or dry – bamboo. Prophylls.
Download ReportTranscript Leaf Dorsiventral Dicot Types of leaves (Phyllopodium) Isobilateral Monocot Cotyledonary – fleshy due to food Hypsophylls or Bract leaves- contain inflorescence at axil. Scaly- Non green or dry – bamboo. Prophylls.
Leaf Dorsiventral Dicot Types of leaves (Phyllopodium) Isobilateral Monocot 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. SAFE HANDS Sporophyll- reproductive. Represent flower. Part of leaves Lamina Petiole Axillary bud Leaf base Apex Margin SAFE HANDS Stipules Types according to their time periodCaducous- detach before the leaf unfoldsMichelia(Champa) Deciduous- detach after unfold of leaf- cassia Types according to their structure and location Persistent – attached permanently - Hibiscus. Free lateral – two free stipules on both side of leaf baseHib. Adnate – two lateral attached to petiole -rose Ochreate – two form hollow tube surrounds node. Interpetiolar – Between petioles of opposite leavesAnthocephalalus Intrapetiolar – between petiole and stem. Foliaceous – two green leaf like. Tendrilar- modified into thin tendrils – Smilax SAFE HANDS Petiole (Mesopodium) Winged Tendrilla Phyllode Floating Orange Acacia Echornia r Nepenthes SAFE HANDS Lamina (epipodium) Venation Parallel Monocot Convergent Wheat SAFE HANDS Reticular Dicot Unicostate/Pinnat Multicostat e\Palmat Divergent e Peepal e Palms Convergent Divergent Ber Castor Furcate SAFE HANDS 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 SAFE HANDS Phyllotaxy Alternative spiral- Mango, Hibiscus. Opposite – two types1. Opposite superposed – Eugenia. 2. Opposite decussate.- Calotropis. Whorled- Nerium Spiral – Hibiscus Mosaic- Acalypha indica. SAFE HANDS Types of Leaves (Depends of incision of lamina) Simple Compound Pinnately compdIncision toward midrib Unipinnate- BipinnatePariImparipinnate Tripinnate- Decompound Palmately compdIncision of lamina toward the base of leaf connect to the tip of petiole SAFE HANDS Palmately compdIncision of lamina toward the base of leaf connect to the tip of petiole Unifoliatecitrus SAFE HANDS Bifoliate Bignonia Trifoliate Oxalis Quadrifoliate Paris quadrifolia Multifoliate Bambax Modification of leaf 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Leaf tendrils- smilax. Leaf spines- Zyzypus. Leaf hooks- Bignonia. Phyllodes- Acacia ariculiformis. Leaf bladders – Utricularia (bladderwort), Pitcher. Succulent – Aloe. Scale leaves- Casuarina Coloured leaf – for pollination – Euphorbia. Leaf root- for balancing – salvinia. Leaf tentacle- Drosera Functions of leaf 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 SAFE HANDS Axillary Racemos e Indefinite SAFE HANDS Cymose Definite Mixed Special Racemose (Indefinite) Indefinite axis Flowers in a acropetal order. Opening of flower is centripetal. Peduncle Unbranched -Simple recemose. Peduncle Branched – compound recemose. SAFE HANDS Types of Racemose inflorescence Main axis elongated Main axis shortened • • • • • • Corymb. • Umbel Raceme Spike. Spikelets. Catkin. Spadix. SAFE HANDS Main axis flat • Concave • Convex Compd/ Simple Penicle Rachilla Raceme SAFE HANDS Spike Spikelets Catkin (Amentum) Rice Oak, Mulbery. Spathe Spadix Banana, colocasia, SAFE HANDS Corymb Iberis, casia Umbel Centella SAFE HANDS Capitulum Helianthus Cymose SAFE HANDS