M'Nab — A Revision of the Species of Abies. 677 



religiosa, Guatemala, Skinner;" and on the label also, "Abies birtella. ' 

 Differt ab Ab. religiosa foKis obtusissimis emarginatis, nee acutis- 

 simis." This seems to me only to differ from religiosa in having the 

 hypoderm cells more scattered, and it resembles in every way the 

 young leaves on the plant of religiosa from Glasnevin Garden. Some 

 of the leaves on the Castle Kennedy specimens are rather obtuse, so 

 that there may be a little variation in this interesting form. 



I place religiosa next bracteata, which it resembles much in its 

 leaves, but it differs in its cone. 



3. Pinus {Abies) amahilis, Douglas, Bot. Mag. Comp. 2, p. 93 (not 

 Parlatore). Abies grandis, A. Murray, Syn. Var. Conif., p. 18 

 (not Douglas). A. grandis, Lambert (?). Picea lasiocarpa, Balf. in 

 Jeff, seeds, p. 1, t. 4, f. 1 (not Hook.). Abies spectahilis, Herpin 

 de Fremont, Bertrand, Anat. Gnet. et Conif. p. 91 (not Don). 



Shoots densely covered with small dark hairs. Leaves inserted 

 singly all round the stem, and placed very close together, the leaves 

 on the under side of the stem and the lateral ones forming two 

 lateral rows spreading outwards, those on the upper side of the branch 

 twisted round so as to bring the upper surfaces of the leaves superiorly : 

 these upper leaves all point to the apex of the shoot, nearly parallel to 

 its long axis, and give the branches a very peculiar appearance. 

 Leaf linear, more or less twisted at the base, which narrows to- 

 wards the orbicular insertion, width nearly uniform, apex rounded 

 and emarginate, upper surface very bright green with no stomata, be- 

 neath with a band of stomata on each side of the midrib, there being 

 from 8 to 1 rows of small stomata in each band. Leaves 1 to 1 J inch 

 long by about -jV inch wide. Buds covered with brown scales, and 

 resinous. 



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

 than thick, sides rounded, upper surface with a faint longitudinal 

 furrow, the midrib not prominent. Hypoderma well developed, form- 

 ing a continuous, or nearly continuous, layer running from the resin- 

 canal of one side, under the upper epidermis, to the resin-canal of the 

 other ; the hypoderm is also developed in the middle line below. 

 The resin-canals are placed, one at each side of the leaf, close to the in- 

 ferior epidermis, but sometimes having a layer of hypoderm separating 

 the canal from the epidermis. The pallisade parenchyma is well deve- 

 loped on the upper side, and below is parenchyma, with intercellular 

 spaces communicating with the stomata. 



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

 marked sheath. 



Tbe figure (Plate 46, fig. 3) is drawn from a specimen supplied to 

 me by my father, from the Royal Botanic Garden, Edinburgh. 



The peculiar appearance of the foliage of this plant is well shown 

 in Mr. Murray's figure (Syn. Var. Conif. p. 19, fig. 20), an appear- 

 ance which is considered characteristic of amabilis of Douglas. It 

 seems probable that this is not the plant meant by Douglas to be called 



