Morphology of the Leaf Lab.docx - MORPHOLOGY OF THE LEAF...

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MORPHOLOGY OF THE LEAF Name of Plants Petiole Stipules Form Venation Leaf arrangement Misc. chars. (margin, apex, base, outline etc.) 1. Calathea The leaves of calathea are borne on long, thin petioles , forming a clump which densifies over time. Scales can be found feeding on petioles. S tipules are semi-ovate and 6 to 7 mm. long Simple leaf Arcuate Rosulate Entire 2. B ougainvillea Lower surfaces are softly hairy with slender petioles. Absent Pinnately Compound Arcuate Alternate Entire 3. Coleus Borne on petioles (stalks) from 0.5–5 cm (0.2– 2.0 in) long. Coleus often develop little leaves that are called stipules where the petiole meets the main stem. Palmately Compound Palmate Opposite Crenate 4. Hibiscus Each petiole, or leaf stalk, bears a single leaf blade, or flower Stipules are caducous, or persistent . Pinnately Compound Pinnate Alternate Serrate 5. Fern Are usually composed of a leafy blade and petiole (leaf stalk). Has flat, rounded, leathery, ear- shaped stipules Bipinnately Compound leaf Pinnate Opposite Lobe
6. Caladium H as smooth, mostly terete petioles and has distinctly winged petioles that are cuadrate or pentagonal in cross- section. Produce growths called stipules which are sometimes spinose Simple leaf Pinnate Whorled Entire 7. Begonia Angel wings has elongate, erect petioles . Two fleshy stipules occur at the base of the leaf petiole . Simple leaf Palmate Alternate Dentate 8. Fittonia Has short petioles that are 2-4 inches long and 1-3 inches wide . Single ligulate intrapetiolar stipule in each leaf axil Palmately compound leaf Cross Venulate Whorled Crenate 9. Spider plant Scales can be found feeding on petioles. Absent Palmately Coumpound Parallel Rosulate Entire 10. Rose The rose has a petiole and five leaflets . The stipule o f rose often has two long projections called auricles. Pinnately compound Pinnate Opposite Serrulat e 11. Photos Adventitious shoot regeneration from photos leaf and petiole explants No free stipules on new growth. Simple leaf Arcuate Alternate Entire 12. Lucky Bamboo P etiole is generally solid, with degenerated leaves, without buds. At the base of the leaf- stalk are stipules, which are inconspicuous, or large and leafy. Simple leaf Parallel Alternate Entire 13. Wandering Jew Has thick and hairy petioles that sheath the stem . Has two stipules at the leaf base Pinnately Compound Parallel Alternate Entire
14. Aglaonema Aglaonema has unique foliar variegation patterns and petiole has four major colors, viz. pink, white, brown and green . Stipules sometimes spinose . Simple leaf Simple leaf Alternate Entire 15. Daisy Has oblong incised leaves and long petioles or leafstalks . Petiole is broadly channeled Absent Pinnately lobe Palmate Rosulate Lobate Table 1. 1. Leaf arrangement phyllotaxy. Classify the available specimens as to the arrangement of leaves on the bodies Type of arrangement Specimens 1. Alternate - San Francisco plant 2. Spiral - Snake plant/ Sansevieria 3. Opposite - Common milkweed plant 4. Decussate - Serpentina Plant 5. Whorled - Five fingers plant b. METAMORPHOSED OR SPECIALIZED LEAVES

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