Fig. lU.—TSUOA ALBERTIANA and T. CANADENSIS. 

 Tsuga Albertiana. — a, spray with female cones ; b, under-side of shoot witii bud and leaves showing 

 bands of stoinata ; c, liranclilct with cluster of male cones ; d, male cone ; e, section of leaf with 

 central resin canal below the vascular bundle ; /, cone-scale with two seeds. T. canadensis.-^ 

 g, branch with cone ; h, under-side of shoot and leaves ; i, section of leaf. 



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