1. Plant Morphology
Basic Plant Parts:
Root - absorbing/anchoring organ (sometimes
storage)
Stem - supportive, conductive organ (sometimes
storage)
Leaf - photosynthetic organ (sometimes
modified)

3. Shoot
= stem + associated leaves
Bud
= immature shoot,
usually with protective scale leaves

6. Each leaf
primordium
develops into
one leaf.
Caryota sp.
Arecaceae

7. Branch
= elongated shoot, arising from bud

9. Plant Habit
Herb - plant with annual above-ground parts
Vine - weak stems, supported by another pl.
Shrub - woody, >1 trunk
Tree - woody, 1 trunk

10. Root Types/Parts
taproot fibrous roots

11. Root Types/Parts
storage roots Raphanus sativus, radish

12. Stem (Shoot) Types
bulb corm
(mostly leaves) (mostly stem)
both underground storage stems

13. Stem (Shoot) Types
horizontal, thickened, storage, long internodes, sharp-pointed
underground develops from ends in plantlet stem
stem tip

14. Leaf Structural Type

15. Leaf Structural Type
Stipular Spine - Euphorbia spp. (Euphorbiaceae)

16. Leaf Structural Type
Leaf Spine (arising from areole) - Cactaceae

17. Leaf Structural Type
Tendril - Lathyrus (Fabaceae)

18. Leaf Structural Type
Bract Bud Scale
-modified, usually reduced leaf -modified leaf functioning to
associated with flowers protect apical meristem of bud

19. Leaf Type / Parts
simple - blade not divided into leaflets
compound-leaf divided into discrete leaflets

20. Leaf Type / Parts
pinnately bipinnately
simple
compound compound

21. Leaf Type / Parts
ternate/ palmate
trifoliolate

22. leaf arrangement
alternate
opposite whorled
spiral
2 leaves / node 3+ leaves / node
1 leaf / node

23. Leaf Venation
2 major types:
parallel - monocots
netted - eudicots

24. vestiture
= cover of plant "hairs" (trichomes)

25. glabrous - smooth, with no trichomes
glaucous - waxy coating
viscid - sticky secretion