PIN US SYL VESTRIS. 1 30 



d. Find a stamen which has burst spontaneously. 

 Note how it is ruptured (by slits). 



e. Note the arrangement of the flowers? They are 

 almost sessile and crowded on an elongated axis 

 forming a spike. Notice the scale subtending 

 each flower, and the number and position of the 

 scales attached to the short stalk of the flower. 



f. Note \h& position of the flowers ; each replaces a 

 branch on the young shoot. 



g. Draw a stamen showing its structure. 



2. Female or pistillate. Taking a single cluster, a spike, 

 notice 



a. The stalk, peduncle, by which it is attached ; its 



direction ; the scales on the peduncle. 

 />. That it is composed of two kinds of scales : (i) 



thin, the bracts ; (2) thick, the carpellary scales. 

 Dissect out a single bract ; note 

 i. The texture and shape. 

 ii. Draw the bract. 



Dissect out a single carpellary scale ; note 

 iii. The shape and texture. 

 iv. The prominent keel on the upper surface in 



the median line. 



v. Two enlargements on the superior surface, 

 near the proximal end, the ovules. Notice 

 Disposition of the ovules and the large ori- 

 fice at their free ends, the micropyle, the 

 integument of the ovule being prolonged into 

 a short tube, whose right and left sides are 

 still further produced into two short fila- 

 ments. 



5 It is assumed that each cluster of stamens constitutes a single flower. 



