M'Nab — A Revmon of the Species of Abies. 697 



over the space between P. cephalonica and P. Nordmanniana. A sec- 

 tion of the leaf of A. Apollinis is figured (Plate 48, fig. 25). 



22, Pinus (Abies) Pinsapo, Boiss. ; Parlatore, D. C. Prod, xvi., p. 422, 

 'Eo. 94 (in part). Ahies Pinsapo, Boissier, Elench. PI. IS^ov. 

 Hisp. p. 84. Picea Pinsapo, Loud. Encycl. of Trees, 1041. 



Shoots smooth. Leaves inserted singly all round the stem, and 

 projecting nearly straight out in all directions from the shoot, but 

 fewer below than on the upper surface. Leaf linear, short, rigid, 

 scarcely twisted above the large orbicular base. Leaf narrowed above 

 insertion, then widening to its full extent and gradually narrowing to- 

 wards the elongated sharp-pointed apex ; upper surface green, witli 

 rows of stomata generally about 6 or 8 in number, and placed rather 

 distantly over the whole upper surface, below with a band of stomata 

 on each side of the midrib, there being about 6 or 7 rows in each band. 

 Leaf from 4- to f inch long, and about ro inch wide. Buds covered 

 with brownish scales, and very resinous. 



Transverse section of leaf. — Leaf flattened, but rather tetragonal, 

 only about twice as broad as thick, sides rounded, upper surface con- 

 vex, below with a prominent midiib. Hypoderma chiefly developed 

 at the margins of the leaf, and above and below the midrib; very 

 much interrupted by the arrangement of the stomata. The resin-canals 

 are placed, one at each side of the leaf, near the margin close to the 

 lower epidermis, but separated from it by a single layer of hypoderm 

 cells. The pallisade tissue is much interrupted on the upper side, and 

 below is the parenchyma with intercellular spaces communicating with 

 the stomata. 



Pibro-vascular bundle double, the whole surrounded by a well- 

 marked sheath. 



The figure (Plate 48, fig. 26) is drawn from a specimen supplied 

 to me by Dr. Moore, and grown at Glasnc^dn. 



I have only examined three plants of this species — two from Glas- 

 nevin and one fi'om Cirencester. Bertrand places this species in his 

 second section, but I have never foiind the resin-canals in the paren- 

 chyma of the leaf. In the Museum, Poyal Botanic Grarden, Edinburgh, 

 there is a cone measuring 1\ inches by 2 inches, and to which one or 

 two leaves were attached. It is marked •' Picea Pinsapo. Erom Eonda, 

 in Spain. Mr. Robertson, Trinity, 1859." After the most careful 

 examination, I refer it to Abies bifolia, Murray — the P. lasiocarpa of 

 Hooker. 



23. Pinus (Abies) Baborensis, Cosson. Abies Pinsapo Baborensis, Cos- 

 son, Bull, de la Soc. Bot. de Erance, viii. 607. Abies numidica, 

 De Lannoy, Rev. Hort. (1866), 106 and 168. Pinus Pinsapo, 

 Parlatore, in part. 



Shoots hairy. Leaves inserted singly all round the stem, but bent 

 so as to form two lateral rows, a few projecting upwards, the base 

 of the leaves on the upper side of the shoot twisted. Leaf linear, 



