,88 



BOTANT. 



(a) Primary Meristem tissue may be readily obtained for study by 

 making thin longitudinal sections of the tips of growing shoots of 

 Mquisetum, Phaseolus, Hippuria, and the roots of Pieris, Zea, Impa- 

 Uens, etc., or by carefully dissecting out the youngest rudiments of the 

 leaves of many Monocotyledons. 



The value of the specimen will often be increased by staining it 

 with carmine. 



(6) The apical cell, which may be seen in the best of the above-men. 



Fig 77.— The growing point of the stem of Equiaetwm sdrpoides. A, seen from 

 •without, showing the apical cell at the top ; the numerals 1, 3, 4, etc., indicate the 

 order of the formation of the partitions of the apical cell ; that marked 1 is the last 

 formed, 3 the third from the last, etc. ; between 4 and 7 on the right, and 6 and 9 on 

 the left, are the partitions which form after the primary ones; B, a vertical section of A. 



tioned sections of Equiaetum and Pteris, should also be studied by 

 jmaking extremely thin cross-sections of the apical portion of the 

 Vegetative Cone ; the triangular shape of the apical cell can thus be 

 male out. 



The simple side view of the isolated Vegetative Cone is also instruc- 

 tive wlien so prepared that it can be rotated under the microscope. 



