Cork (phellogen or “cork cambium’’) 
Suberin prevents cork from wetting. 
Lenticels, at stoma on stem, cork beneath. 
2. Fibrovascular System. 
Fibrous tissue. 
(Some occurs in fundamental system 
ex., bundle sheaths, strands in cortex). 
Vascular, or tracheary tissue. 
Sieve tissue. 
Fascicular cambium. 
2. Epidermal System: 
Epidermis. 
Trichomes, etc. 
4. Origin of Tissues. 
Meristem tissue. 
Stem apex 
Root apex 
Cyinder of cambium, produces secondary tissues. 
Origin of stem tissues. 
Dermatogen—epidermis. 
Plerome—central cylinder or stele. 
produce primary tissues. 

Periblem—cortex. 
Central cylinder or stele. 
Pith. 
Bundles } a 
phioem 
Medullary rays. 
Pericycle. 
Bundles. 
| xylem. 
Collateral—Dicotyiedons and Conifers,—open { cambium, 
| phloem. 
5 2 xylem. 
‘“Concentric—-Monocotyledons and Ferns,—-closed ) 
phloem. 
Radial—roots. 
Origin of root tissues. 
Calyptrogen in addition to those in sten. 
7 
