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01 c plant morphology
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01 c plant morphology

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  • 1. Plant Morphology Basic Plant Parts:Root - absorbing/anchoring organ (sometimes storage)Stem - supportive, conductive organ (sometimes storage)Leaf - photosynthetic organ (sometimes modified)
  • 2. Shoot = stem + associated leaves Bud = immature shoot,usually with protective scale leaves
  • 3. Each leafprimordiumdevelops intoone leaf.Caryota sp.Arecaceae
  • 4. Branch= elongated shoot, arising from bud
  • 5. Plant HabitHerb - plant with annual above-ground partsVine - weak stems, supported by another pl.Shrub - woody, >1 trunkTree - woody, 1 trunk
  • 6. Root Types/Partstaproot fibrous roots
  • 7. Root Types/Partsstorage roots Raphanus sativus, radish
  • 8. Stem (Shoot) Types bulb corm (mostly leaves) (mostly stem)both underground storage stems
  • 9. Stem (Shoot) Types horizontal, thickened, storage, long internodes, sharp-pointedunderground develops from ends in plantlet stem stem tip
  • 10. Leaf Structural Type
  • 11. Leaf Structural TypeStipular Spine - Euphorbia spp. (Euphorbiaceae)
  • 12. Leaf Structural TypeLeaf Spine (arising from areole) - Cactaceae
  • 13. Leaf Structural TypeTendril - Lathyrus (Fabaceae)
  • 14. Leaf Structural Type Bract Bud Scale-modified, usually reduced leaf -modified leaf functioning to associated with flowers protect apical meristem of bud
  • 15. Leaf Type / Partssimple - blade not divided into leafletscompound-leaf divided into discrete leaflets
  • 16. Leaf Type / Parts pinnately bipinnatelysimple compound compound
  • 17. Leaf Type / Parts ternate/ palmatetrifoliolate
  • 18. leaf arrangement alternate opposite whorled spiral 2 leaves / node 3+ leaves / node1 leaf / node
  • 19. Leaf Venation2 major types:parallel - monocotsnetted - eudicots
  • 20. vestiture= cover of plant "hairs" (trichomes)
  • 21. glabrous - smooth, with no trichomes glaucous - waxy coating viscid - sticky secretion

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