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 (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 (Pinuf; Pitmilio). 



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. 3 Two spiltes of polliniferous 

 scales. ^Branch with apical group of staminal flowers from which pollen is being discharged. ^Female flower. 1,2 xlO: 

 3x8; 6x2; * 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 



