682 PyoceecUngs of the Royal Irish Academy. 



This species is very distinct anatomically, and as far as I kno'w is 

 not yet in cultivation, not having received it from any of our gardens 

 and nurseries. 



M. Bertrand {loc. cit. p. 89) gives Abies concolor as a synonym 

 of Abies grandis, Lindl., but gives the characters of concolor for the 

 species. 



7. Finns lasiocarpa, Hooker, Fl. Bor. Amer. ii., p. 163, (not Balfour.) 

 Abies bifolia, A. Murray, Proc. of Boyal Hort. Soc. London, iii., 

 p. 320. F. amahilis, Parlatore, D. C. Prod., vol. xvi., p. 426, 'Eo. 

 102 (in part). ? Picea amahilis, iffewberry. 



Leaves of two forms, those on ordinary branches fi'om^ to IJ 

 inch long, and grooved on the upper side, those on the cone-bearing 

 shoots shorter, and without the groove. Stomata on both sides of the 

 leaf, above with many rows especially near the apex, below with two 

 bands on each side of the rather prominent midrib, there being 

 from 6 to 8 rows in each band. Leaves either pointed, or blunt, or 

 slightly emarginate, from iV to tV inch wide. 



Transverse section of leaf. — Leaf (ordinary branch) flattened, about 

 three times as broad as thick, sides rounded, upper surface with a 

 central longitudinal furrow, below with a prominent midrib. Leaf 

 (cone-bearing branch) tetragonal, more than half as thick as wide, with 

 no furrow. Hypoderma developed at edges of leaf below epidermis of 

 midrib, and generally superiorly. Resin-canals in the parenchyma of 

 the leaf, and remote from the inferior epidermis. 



Fibro-vascular bundle double, and surrounded by a well-marked 

 sheath. 



I have examined nine dried specimens, all of which I refer to this 

 species. The first is a specimen in Kew Herbarium : the leaves were 

 sent to me by Prof. Oliver, and labelled "P. lasiocarpa. Hook. (sp. 

 typiea). Coll. Douglas." This specimen first showed me that P. lasio- 

 carpa, Hooker, was not P. lasiocarpa of Balfour, or of oiir gardens. A 

 transverse section of the leaf is figured in Plate 46, fig. 7. My valued 

 correspondent, Mr. Syme, of Elvaston Xurseries, sent me leaves of 

 P. bifolia, A. Murray, got from M. Poezl. These on examination 

 proved to be the same as P. lasiocai'jia. Hooker. The two forms of leaves 

 were sent by Mr. Syme — both the grooved and quadrangular forms. 

 One of the leaves is figured in section (Plate 47, fig. 8). Mr. Syme 

 adds on the label of the specimen sent to me the note: "M. Roezl 

 informs me that it is not veiy handsome." Young plants sent by Mi". 

 Syme were also examined, but they did not present the distinctive 

 features of the species. Five specimens from Kew Herbarium were 

 then examined, collected by Dr. Lyell in 1860 and 1861, and in the 

 collection of the Oregon Boundary Commission. These specimens were 

 collected in the Cascade Mountains, Galton range of Rocky Mountains, 

 and along the Columbia River, through 10° of latitude, viz., from 39°]^". 

 to 49°X. ; and on the Galton range, at an elevation of 7000 feet. These 



