722 



THE SUBDIVISIONS OF THE VEGETABLE KINGDOM. 



various kinds of Firs {AUes and Picea). All have needle leaves, but variously 

 arranged. In Pinus the needles are borne in tufts of two (figs. 408 * and 408 ^) or 

 three or five. The tufts are really short branches which arise in the axils of relatively 



Fig. 408.— Mountain Pine (Pinus Pumilio). 



1 A single polliniferous scale (stamen) seen from above, 2 Three polliniferous scales, one above the other, seen from the side. 

 The pollen falling from each anther alights on the upper surface of the stamen next below, s Two spikes of polliuiferou& 

 scales. *^ranch with apical group of stamhial flowers from which pollen is being discharged, sj'emale flower. ^,2 xlO: 

 3x8; *x2; 4 natural size. 



inconspicuous scales (of. fig. 408 ^) and though these branches are produced plenti- 

 fully, permanent long branches arise only at the yearly limits of growth. The 



