WEYMOUTH PINE 



G.N. 8309 



WEYMOUTH PINE OR AMERICAN WHITE PINE 



Pinus Strobus Linn. Coniferae. Abietinese. 



A very light soft wood of a whitish colour sometimes tinged with red. 

 The striping is not by any means boldly marked and the distinctions 

 between the Spring and Autumn wood are, if anything, less pronounced 

 than in the Spruce which it much resembles. 



Smell when worked feeble or none. Lustre, micaceous or silky. 

 Reaction with potash on the citron-coloured watery extract, clears to 

 a beautiful bright green. With perchloride of iron, a cloudy, brandy- 

 coloured solution that does not clear readily (constant?). 



Structure as that of the Spruce from which it is difficult to distinguish. 

 The great abundance of the vertical resin-canals in the present species 

 and the rarity in the Spruce are sufficient in most cases. Structure as 

 in the Pines generally (compare Figs. 1, 4, 7). 



Resin-canals abundant, often as many as 40 to the inch of arc. 



Pits in the cross-field, one large one only, according to Bauschinger: 

 one, two or three, according to W. S. Jones. Our specimen shows one 

 in the Autumn and two in the Spring wood. 



Walls of the ray-tracheids, smooth. 



Large rays similar to those of P. sylvestris, but considerably larger in 

 tangential section, while the small linear rays remain about the same size 

 in both. 



Pith large (up to j inch diameter), soft, much lighter in colour than 

 the wood, conspicuous. 



Weymvuth Pine may be confused It may be distinguished from 



with all those with which P. syl- 

 vestris may also be confounded. 



P. sylvestris by the height of the 

 lenticular or large rays (Fig. 7), 

 the abundance of pairs of pits 

 in the cross-field of the Spring 

 wood and the smooth-walled 

 ray-tracheids. The lenticular 

 rays are multiseriate for the 

 greater part of their height. 

 From the other species as 

 P. sylvestris, which see. 



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