TO THE HTSTOKT OP CERTATK COKIFERS. 



205 



The central bundle of fibro-yascular tissue is surrounded by a 

 well-marked bundle-slieath, and has the xylem above and the 

 phloem beneath in the usual manner. 



Picea 0)nentalisj which has been compared with it, has shorter 

 leaves, more acutely pointed and more four-sided in section. 

 The cells also which surround the central bundle-sheath are in 

 P. orient alls of an oblong form, and radiate from the central 

 bundle on all sides. Their walls are -undulated. Hence, then, 

 the superficial appearance, no less than tlie internal structure of 

 the leaves, is quite distinct in the two species; a comparative 

 examination of- which, therefore, confirms Dr. Pancic's view, that 

 he had to do with a previously undescribed species, and not with 

 a form of P. orienfalis. Moreover, the cones of P. orientalis are 

 lono-cr and the scales broader than in P. OmoriTca. 



Fig, 29. 



X 2 



Ticca orientalis. — Leaves and plan of leaf-section 



Pinus Peuke, Griseh. 



Pinus PeuTce, Grisebacli, S^icil Flor. Bumel. ii. p. 239 ; 

 Christy Euro}}. AUet, p. 9; Endliclier, Conif. Sj/no^s. p. 144; 

 J. D. HooJcer in Journ, Linn. Soc. 1865, p. 146, et in Gard. 

 Citron. Feb. 24, 1883, p. 244 ; Boissier, Flora Orientcdis, vol. v. 

 (1884) p. 698; Engehnann in Trans. Acad. St. Louis, iv. 1880, 



p. 170, Revision, p. 18. 



Pinus excelsa, Parlatore in DC. Prod, xvi. ii. p. 405, ex parte, 



hand Wallieh. 



V. Cembra, var. fruticosa, GrisehacJi, Seise in Rumelien,]). 189, 



te.ste Parlatore, I. c. 



'^ In [Macedonia] Scardo australi in monte Peristeri prope 

 Bitoliam, alt. 2400-5000 ped.," Grisebach, Heldreich {ex Par- 

 latore). In monte Perimdagh supra Xevrekop Janka, in monte 

 Eilo Thracise, Pancicii, teste Boissier, I. c. 



For my knowledge of thi.^ Pine I am entirely indebted to Sir 



