230 Pines found in tlie Tanrian Caucasus. 



and scales with larger tubercles, the lower with very prominent 

 recurved, obtuse mammillae, exactly like P. uncinata gallica. 

 Wittmann brought one perfectly similar from Lasistan. I con- 

 sider all these to be the same species, although described by 

 authors under various names ; for the structure of the scales 

 often varies on the same tree, nor do the male flowers afford any 

 distinction. To this species I even refer the following, though 

 much more different. 



Var. hamata mihi. Leaves in twos, shorter than the elongated 

 conic strobile. Scales with an elongated, acute, dorsal mucro. 



Brought by Wittmann from Lasistan. Nordmann saw it in 

 the subalpine regions of Mount Adshar. 



Cones sometimes 3 in. long, acute at top. The dorsal tubercle 

 of the scales often measures 2 lines, the mucro projecting far 

 beneath the subjacent scale. Wing of seed narrow, equalling at 

 its greatest breadth only a third of its length. However im- 

 portant these characters may seem to others, I cannot establish 

 a species from them ; for 1 have before my eyes cones of P. syl- 

 vestris genevensis and austriaca, shorter indeed, but in the hook 

 of the scales scarcely yielding to caucasica ; and others from 

 seeds of P. sylvestris europae x a, reared in the Nikita Garden, in 

 like manner acutely conical, and armed with a long hook more 

 or less recurved. Even among the specimens sent me by Witt- 

 mann occur cones much shorter, and with obtuser tubercles. All 

 which maturely considered, 1 cannot separate the present tree 

 from P. sylvestris. 



Var. argentea mihi. Leaves in pairs, silvery-white, nearly as 

 long as the ovate conical strobiles. Scales with a tubercle 

 hooked backwards. 



Seen by Wittmann in Lasistan, who remarks that he observed 

 but one tree of it, and that not far from the village of Artamin, two 

 days' journey from Batum. Lofty, densely branched, and full of 

 leaves of a splendid silvery hue, it received its greatest beauty 

 from its equally silvery cones. Nordmann also saw this variety 

 on the summit of Adshar. 



The branchlets loaded with cones which I received from 

 Wittmann, except in colour, which, even in the dry state, is ex- 

 cessively white, agree in every point with P. hamata. The stro- 

 biles are a very little shorter, and the scales a little more shortly 

 pyramidal, exactly as in the specimen of P. hamata above men- 

 tioned. One character only of greater moment is found in the 

 wing of the seed, which is shorter (8 lines long) and broader 

 (3 lines broad), giving it a sufficiently different shape. It is also 

 more sparingly and unequally speckled with ferruginous dew, and 

 the coloured nerves are scarcely conspicuous. But the form and 



