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 (Pinn3 Pumilio), 



* A single polUniferous scale (stamen) seen from above. 3 Three polliuiferous 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. » Two spikes of poUiniferous 

 scales. * Branch with apical group of staniinal flowers from which pollen is being discharged. * Female flower. ^,2 xlO; 

 5x8; 5x2; * natural size. 



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

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



