THE ANATOMICAL STRUCTURE OF THE LEAF. 99 



No. 8 (94). Pinus (Abies) Pinsapo, Boiss, Parlatore (part). 

 Abies Pinsapo, Boiss. 



Leaves projecting all round the stem, short, rigid, with a very- 

 sharp point ; upper surface with six or eight rows of stomata, 

 placed rather distantly over the whole surface, below with a band 

 on each side of the midrib. Hypoderma well developed, often two 

 or three cells thick, but forming a zone, interrupted by the sto- 

 mata. Resin canals close to the epidermis of the under side. 



Living specimens only of A bies Pinsapo have been examined ; 

 and I have not been able to examine leaves from an authentic 

 cone-bearing shoot. 



Related, although distantly, to A. Nordmanniana and A. Cepha- 

 lonica, more nearly to A. Baborensis, but in all respects a remark- 

 able distinct form. 



No. 9. Abies Baborensis, Coss (Pinsapo, Parlatore in part). 

 Abies Numidica, De Lannoy. 



Leaves short, blunt, or emarginate at the apex, above with one 

 or two short rows of stomata near the apex, below with a band on 

 each side of the midrib. Hypoderma scanty. Resin canals close to 

 the epidermis of the under side. 



Somewhat intermediate between Pinsapo and Nordmanniana in 

 appearance, but differing anatomically in the presence of stomata 

 on the upper side, and in the scanty development of the hypoderma. 

 Living specimens only have been examined from the Royal Botanic 

 Garden, Edinburgh, from Glasnevin Botanic Garden, and from 

 Elvaston Nurseries. It is cultivated under the names of Numidica 

 and Baborensis. 



No. 10 (95). Pinus (Abies) balsamea, Linn., Parlatore. 

 Abies balsamea, Mill. 



Leaves short, apex emarginate ; upper surface with two or 

 more rows of stomata in the middle line, near the apex, below 

 with a band of stomata on each side of the midrib. Hypoderma 

 wanting. Resin canals in the parenchyma of the leaf. 



Closely related to A. Fraseri, and not easily separable anatomi- 

 cally. Living specimens have been examined from the Royal 

 Botanic Garden, Edinburgh, and from Elvaston Nurseries. Two 

 American specimens from Kew Herbarium, and the leaves from a 

 cone-bearing shoot in the Museum, Royal Botanic Garden, Edin- 



