694 Proceedings of the Royal Irish Academy. 



leaves, therefore, seem to me inclined to be of two shapes, thus resem- 

 bling bifolia, Murray (lasiocarpa, Hooker). 



Specimens from Edinburgh, Griasnevin, and Cirencester, have been 

 examined, but no dried specimens from native habitats. 



19. Pinus {Alies) Nordmanniana, Stev., Bull, de la Soc. d. Nat. de 

 Mosc, xi. 45 (1838). Pinus Abies, Duroi; Parlatore, D.C. Prod, 

 vol. xvi., p. 421, 1^0. 92 (in part). 



Shoots hairy or smooth. Leaves inserted singly all round the stem, 

 those belovp- bent so as to form two lateral rows, those above directed 

 more or less upwards, and twisted at the base so as to bring the upper 

 surface of the leaf superiorly. Leaf linear, more or less twisted at base, 

 apex emarginate, upper surface yellowish green, with no stomata, 

 beneath with a band of stomata on each side of the slightly prominent 

 midrib, there being from 8 to 9 rows of stomata in each band. Leaves 

 from 1 inch to 1|- inch in length, and about iV inch wide. Buds covered 

 with reddish-brown resinous scales. 



Transverse section of leaf. — Leaf flattened, three times broader than 

 thick, sides rounded, upper surface only faintly grooved, below with 

 a scarcely prominent midrib. Hypoderma well developed, forming a 

 slightly interrupted band, running from the resin-canal of one side, 

 under the upper epidermis, to the resin-canal of the other side. The 

 hypoderm is also developed under the epidermis covering the mid- 

 rib. The resin-canals are placed at each side of the leaf, close to the 

 under surface, and separated from the epidermis by a single layer of 

 cells. The pallisade tissue is well developed above, and below is the 

 parenchyma with intercellular spaces. 



Fibro-vascular bundle double ; parts placed close together, and 

 having a well-marked sheath. 



The figure (Plate 48, fig. 22) is drawn from a specimen from 

 Glasnevin, given to me by Dr. Moore. 



The difference in the position of the resin-canals at once separates 

 I^ordmanniana from pectinata ; the shape of the leaf and the arrange- 

 ment of the hypoderma being similar. Plants from Edinburgh, Glas- 

 nevin, and Cirencester have been examined, but none from native 

 habitats. The leaves on the cone-bearing shoot differ from those on 

 the ordinary branches only in having the midrib slightly more pro- 

 minent. 



20. Pinus (Ahies) ciUcica, Kotschy, in Osterr. Bot. Wochenblatt, iii., 



409 (1853) ; Parlatore, D. C. Prod, xvi., p. 422, No. 93. 



Shoots hairy or smooth. Leaves inserted singly all round the 

 stem, but bent so as to form two lateral rows ; several point up- 

 wards, and very few are directed downwards. Leaves linear, twisted 

 above the base, especially in those leaves on the upper part of the 

 shoot which are turned so as to have the superior surface upwards, 

 apex obtuse and emarginate, upper surface green, with no stomata, 



