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Nonvascular Plants: Mosses, Liverworts, and Hornworts (Characters of…

- - - - foot
    - - simple meristem
        
        capsule
        
        inner and outer layer
        
        sterile cells
    - - seta
    - - apex of sprangium
        
        caplike lid
    - - respond humidity
        
        bends outward(dry air)
        
        bend inward(air humid)
    - - layer of cells
        
        derives from neck
  - - - grow from apical meristem
    - - little tissue differentiation
    - - cortex
    - - composed of hydroids
        
        conduct water
        
        dissolve minerals
      - elongated cells
        
        lose ctyoplasm when mature
    - - leptoids
        
        resemble sieve cells
        
        elongated
        
        lack nuclei at maturity
    - - base of stem
        
        small,multicellular
        
        penetrate surface
    - - resembles green algae
        
        small chloroplasts
    - - microgametangia
        
        short stalk
        
        sterile cells
        
        inner mass of cells
        
        sperm cells
    - - eggs occur in meagamentangia
        
        shape like a vase
        
        long neck
- - - - resembles moss
        
        thin leaves
        
        slender stem
    - - flat and ribbon like
        
        oil bodies
        
        thallus
        
        body without
        
        roots,stems,leaves
      - air pores
    - - umbrella-shaped
        
        stalk several mm
      - apex set of fingers
        
        droop down
  - - - single
        
        elongated
        
        spring shape walls
- - - - only in the center
        
        4or5 cells thick
    - - may grow outward
        
        forming disk
  - - - gametophore tissue
    - - no discrete sporangium
    - - produces sporangium tissue