REFERENCES 29 



of the youngest leaf priinorclia. Also show the form and arrange- 

 ment of the cells (1) in a small portion of a provaseular strand, 

 and (2) at several successively older regions of the rib meristem. 

 Label carefully all important structures. 



3. Prepare an outline drawing of one of the available types 

 of angiospermous root apices, showing diagrammatically and la- 

 belling the following : root cap, subtermina! meristem, region of 

 elongation, region of maturation, epidermis, cortex, stele. 



4. Select one of the types of root apices and fill in the cellular 

 details of the root cap, the calyptrogen (if present) and the so- 

 called 'Miistogens" of the root proper, i.e.,: "dermatogen," 

 "periblem," "plerome." Label all parts of the drawing. 



5. Prepare drawings of the cambium of Pinus and Rohinia 

 showing its appearance as seen in the transverse, radial and tan- 

 gential planes of section. In the drawings of transverse and 

 radial sections, a small portion (i.e., several cell layers) of the 

 adjacent phloem and xylem tissue should be shown. 



REFERENCES 



1. Bailey, T. W., The Cambium and Its Derivative Tissues, III. 



A reconnaissance of cvtological phenomena in the cambium. 



Amer. Jour. Bot. 7 :4i7-434. 1920. 

 2. , , The Cambium and Its Derivative Tissues, 



IV. The increase in girth of the cambium. Amer. Jour. Bot. 

 10:499-509. 1923. 



3. ^ , The Cambium and Its Derivative Tissues, 



V. A reconnaissance of tlie vacuome in living cells. Zeitsch. 

 fiir Zellforch. u. mik. Anatomic. 10:651-682. 1930. 



4. Ball, E., Micrntechni(|ne for the KShoot Apex. Amer. Jour. 

 Bot. 28 :233-243. 1941. 



5. Barghoorn, E. J., Jr., Origin and Development of the 1 'ui- 

 seriate Pxav in the Coniferae. Bull. Torr. Bot. Club 67:303- 

 328. 1940. 



6. Bloch, R., Wound Healing in Higher Plants. Bot. Rev. 

 7:110-146. 1941. 



7. Boke, N. II., Histogenesis and Morphology of the Phyllode in 

 Certain Species of Acacia. Amer. Jour. Bot. 27 :73-90. 1940. 



8. , , Zonation in the shoot apices of TricJwcercus 



spacliianus and Opunila cyUndrka. Amer. Jour. Bot. 28: 

 656-664. 1941. 



9. Bower, F. 0., Size and Form in Plants. London, 1930. 



