Illustrations of Conifers. 



V. LEAVES ON LATERAL BRANCHES ARRANGED IN TWO WAYS WHICH ARE OFTEN OBSERVABLE ON 



THE SAME THEE AND DEPEND UPON THE VIGOUR OF THE SHOOTS. 



A. cilicica, Carriere ; Asia Minor. Leaves either (A) pectinate above with a V-shaped 

 depression between the lateral sets, or (B) with the median leaves above crowded 

 and covering the branchlet, as in A. Nordmanniana. The leaves are slender, up 

 to 1J inch long, not conspicuously white below, slightly bifid at the rounded or 

 acute apex ; resin-canals marginal. Shoots smooth, with scattered short erect 

 pubescence. Buds small, ovoid, non-resinous. Vigorous shoots of this species 

 resemble a weak A. Nordmanniana but with the leaves shorter, more slender and 

 less white beneath. The buds are much smaller. 



A. 11 U7n idica, De Lannoy; Algeria. Leaves either pectinate above with a V-shaped 

 depression, or crowded and covering the upper side of the branchlet, but dif- 

 ferent from all other species in the median leaves above, in that case being 

 directed backwards and not forwards. Leaves short, up to J inch long, broad, 

 rounded at the entire or slightly bifid apex ; in most cases with four to six broken 

 lines of stomata on their upper surface near the tip, lower surface with white lines 

 of stomata ; resin-canals marginal. Shoots brown, shining, glabrous. Buds large, 

 ovoid, non-resinous. 



VI. LEAVES IRREGULARLY AREANGED ; THOSE ON THE LOWER SIDE OF THE BRANCHES NOT TRULY 



PECTINATE. 



A. Pindrow, Spach ; W. Himalayas. Leaves all directed more or less forwards ; those 

 above irregularly and imperfectly covering the branchlet ; those below mostly 

 pectinate but with some directed downwards and forwards. Leaves soft, pale 

 green, up to 2-J inches long, lower surface with grey lines of stomata, bifid at the 

 apex with two sharp cartilaginous points ; resin-canals marginal. Shoots grey, 

 glabrous. Buds large, globose, resinous. 



A. concol&r, Lindley and Gordon ; Colorado, Utah, Arizona. New Mexico, Northern 

 Mexico, Southern California. Leaves imperfectly pectinate both above and below, 

 some in the middle line being always directed forwards and not laterally outwards ; 

 up to 2 to 8 inches long ; apex entire ; upper surface convex and not grooved, with 

 lines of stomata ; resin-canals marginal. Shoots smooth, olive-green, glabrous. 

 Buds large, conical, resinous. 



A . lasiocarpa, Nuttall ; western N. America. Leaves either in an imperfectly pec- 

 tinate arrangement or with most of the leaves directed upwards, those in the 

 middle line above crowded and standing edgeways ; 1 J inches long, narrow, usually 

 entire, with conspicuous lines of stomata on the upper surface, especially in their 

 anterior half. Resin-canals median. Shoots smooth, with a moderately dense, 

 short, wavy pubescence. Buds small, conical, resinous. 



