698 Proceedings of the Royal Irish Academy. 



base much, smaller than in Pinsapo, rapidly widening to its full 

 extent, then contracting rapidly near the blunt or emarginate apex ; 

 upper surface dark green, with a few stomata in one or two short rows 

 near the apex of the leaf in the middle line, below with two bands of 

 stomata on each side of the midrib, there being from 7 to 8 rows in 

 each band. Leaves ^ to f inch in length, and about ra inch wide. 

 Buds covered with yellowish-brown resinous scales. 



Transverse section of leaf. — Leaf flattened, about 3|- times as broad 

 as thick, sides rather sharp, upper surface slightly convex, with a 

 faint longitudinal furrow, below with a slightly marked midrib. 

 Hypoderma chiefly developed at the margins of the leaf, there being- 

 only about a dozen thickened cells placed externally to the resin- 

 canal, and a few scattered hypoderm cells under the upper epidermis, 

 and a few in the middle line below resin-canals, near the margins of the 

 leaf and placed close to the epidermis of the lower surface. The 

 pallisade tissue is well developed on the upper side where not inter- 

 rupted by the presence of stomata, 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. 27) is drawn from a specimen supplied 

 by Mr. Syme, Elvaston Nurseries. 



I have only examined four specimens of this plant, which differs 

 so strikingly from A. Pinsapo in anatomical characters. Not hav- 

 ing seen the cone, I cannot describe it. This species is cultivated in 

 the Eoyal Botanic Garden, Edinburgh, and at Glasnevin Botanic 

 Garden, under the name of Abies numidica, and is sent to me by Mr. 

 Syme, with both the names "numidica," and " Baborensis." 



24. Pinus (Ahies), sp. : Bocky Mountains, Drummond. 



Shoots hairy. Leaves inserted singly, and very close together, all 

 round the stem, but bent to form two lateral rows, those on the upper 

 side of the shoot chiefly directed upwards. Leaf linear, twisted at the 

 base, especially on upper side where the leaf is twisted half a 

 turn, base orbicular, width of leaf rather uniform, apex blunt, the 

 margin of the leaf sharp, upper surface dull green, with no stomata, 

 below with a band of stomata on each side of the hardly prominent 

 midrib, there being from 5 to 7 rows in each band. Leaves from ^ 

 to f inch long, and about 1-2 inch wide. Buds covered with yellowish- 

 brown resinous scales. 



Transverse section of leaf. — Leaf flattened, about 3A- times as 

 wide as thick, sides not rounded, but with a sharp transparent 

 margin, upper surface with a longitudinal furrow, below with the 

 midrib not prominent. Hypoderma well developed, forming an inter- 

 rupted band from the outer margin of the resin-canal of one side, under 

 the epidermis of the upper surface, to the resin-canal of the other side; 

 the hypoderma is also developed under the fibro-vascular bundle. The 

 resin-canals are placed at each side of the leaf, close to the lower epi- 



