676 Proceedings of the Royal Irish Academy. 



dentalis ;" the other was marked ''119, Picea bracteata, W. Lobb„ 

 California." These specimens of Douglas and Lobb have in evorv 

 respect the same anatomical characters as the specimen from Elvaston 

 IS'-urseries, figured in the paper. 



There is a specimen with cones in the Museum, E,oyal Botanic- 

 Garden, Edinburgh, presented by Mr. Andrew Murray in 1859. 

 The leaves of this specimen do not differ anatomically from those 

 already described. 



2. Pinus [Alies) religiosa, Humb., Bonpl. and Eunth, N'ov. Gen. et 

 Sp. 2, p. 5 ; Parlatore, D. C. Prod. vol. x\i., pars 2, p. 420, jS^o. 

 91. 



Shoots hairy or smooth. Leaves inserted singly, and not very 

 closely, all round the stem, but bent so as to form two lateral rows.. 

 Upper side of shoot with leaves directed outwards at a small angle. 

 Leaf linear, straight or curved, slightly twisted above the base, con- 

 tracting at apex into a point, upper surface deep green with no sto- 

 mata, below with a band of stomata on each side of the midrib, there 

 being from 8 to 10 rows in each band. Leaves from 1 to 1^ inch 

 in length, and about ^ inch wide. Buds pale-coloured, and very 

 resinous. 



Transverse section of leaf. — Leaf flattened, nearly three times 

 broader than thick, sides rounded, upper surface with a central 

 longitudinal furrow, below with a slightly jH'ominent midrib. Hypo- 

 derma conspicuous, forming a continuous, or only very slightly inter- 

 rupted, band, extending from the resin-canal of one side underneath the 

 epidermis of the upper surface to the resin-canal of the other side : 

 below the epidermis of the midrib a series of hypoderm cells also exists. 

 The resin-canals are two in number, placed close to the epidermis of 

 the under side of the leaf, and rather near the margin. The pallisade 

 parenchyma is well developed on whole upper part of leaf; below, the 

 parenchyma, with intercellular spaces communicating with the stomata, 

 is well seen. 



Fibro-vascular bundle double, surrounded by a well-developed 

 sheath ; the parts of the bundle are not widely separated, and a few 

 thick liber-like cells are placed superiorly. 



The figure (Plate 46, fig. 2) is di-awn fi'om a specimen kindly sup- 

 plied to me by Mr. Powler, gardener. Castle Kennedy, N. B. 



Pinus (Abies) religiosa is very closely related to P. bracteata, and 

 Bertrand says that the two do not differ anatomically. The shape of 

 the leaf in section is, however, different, and the thick hypoderm cells 

 are larger and more interrupted than in P. bracteata. I have seen two 

 specimens from Castle Kennedy, one figured above, the other in the 

 Museum, Royal Botanic Garden, Edinburgh. It has a cone, ripened 

 in 1867, about 4 inches long by 2 wide, with projecting bracts. The 

 specimen from Glasnevin was in an unhealthy condition when ex- 

 amined, and has the hypoderm less developed than in the Castle 

 Kennedy specimens. In Kew Herbarium is a specimen, marked " Abies- 



