Saturday, May 14, 2011

cognosy


-bent hair  thyme 





septate fibre  ginger






 a-anomocytic
b-anisocytic
c-diacytic
d-paracytic  stomata








crystal sheath











crystal sheath






















casparian strip 














starch sheath (SS)
  primary phloem fibres (PPF).
lignified xylem












lignified xylum








pith stained blue with iodine contain  starch




 

stem
there is pith
-dicot 
because there is
1-cambium 
2-vascular bundle is continous not scattered
-young because  pith is wider








dicot stem









monocot stem
because vascular bundles are scaterred
no cambium




monocot stem























rhizome
there is cork, pith










rhizome











rhizome 














v .b.














this is stem not root  because it contains 
pith 











































-no pith   
-old root 
-old because
1-endodermis absent
2-stele wider than cortex 










no pith
young root
endodermis distenict
cortex wider than stele 







-dicot   
because  there is cambium (open vessel bundle)
root(no pith) 



examples t.s.  with details