722 



THE SUBDIVISIONS OF THE VEGETABLE KINGDOM. 



various kinds of Firs (Abies and Picea). All have needle leaves, but variously 

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

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



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



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

 The pollen falling from each anther alights on the upper surface of the stamen ne.\t below. 3 t«o spikes of polliniferous 

 scales. * Branch with apical group of staniinal flowers from which pollen is being discharged. * Female flower. 1,^ xlO: 

 3x8; äx2; * natural size. 



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

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



