M'Nab — A Ecviaion of the Sjjecies of Abies. 701 



and about ^-o inch. wide. Buds small, dark-coloured, and covered -vrith 

 resin. 



Transverse section of leaf. — Leaf sligMly quadrangular, rather 

 more than one-half as thick as broad, sides rounded, upper surface 

 with a central ridge, below with a prominent midrib. Hypoderma well 

 developed, a single or sometimes a double layer, at sides, below epi- 

 dermis of midiib, and a few below the ridge on upper side. The hypo- 

 derma is interrupted above between the ridge and the margin, by the 

 presence of the stomata. The resin-canals are two in number, placed 

 -close to the under side of the leaf, and generally about half-way be- 

 tween the midrib and the margin. Between the midrib and the resin- 

 canal on each side inferiorly, the stomata are developed, and occa- 

 sionally a row of stomata is seen between the resin-canal and the 

 margin of the leaf. The pallisade parenchyma is scarcely developed, 

 owing to the presence of the stomata. 



The fibro-vascular bundle is single, and surrounded by a well- 

 marked sheath. 



The figure (Plate 49, fig. 30) is drawn from a specimen kindly 

 supplied to me by Mr. Anthony Waterer, Knap Hill Nursery, near 

 "Woking, Sui-rey. 



I have examined twelve specimens of this species — six living, and 

 six dried. The living plants were from Edinburgh ; from Mr. Syme, 

 Elvaston i!^urseries ; from Mr. Anthony Waterer, Knap Hill JSurserj ; 

 and from Grlasnevin ; while the dried specimens were from Kew Her- 

 barium, and Edinburgh Museum. It is cultivated in Edinburgh, 

 under the names robusta and magnifica. The specimen marked " ro- 

 busta" has the following note by my father : " The piece of P. ro- 

 busta is from a layer taken from the original plant sent home by 

 Douglas;" and he adds, " I think it likely that, in certain soils, 

 P. nobilis, robusta, and magnifica, may all turn out to be the same, 

 although distinct in the garden here." Two of the specimens were 

 raised from seeds sent home by Jeffrey. The specimen in Glasnevin 

 was a small very unhealthy plant from Perth ISTurseries, and was cul- 

 tivated under the name of Picea amabilis. The specimens from Mr. Syme 

 and Mr. "Waterer were correctly named magnifica. There are thi-ee 

 specimens of this species in the Kew Herbarium, one marked " Sierra 

 IS'evada, L. California, W. Lobb ;" figured (Plate 49, fig. 30 a), and 

 two marked " California, H.Low, Esq., Clapton." These are, I believe, 

 the types of Mr. MuiTay's magnifica. There are three specimens in the 

 Edinburgh collection; one is marked "Picea robusta magnifica, 1480, 

 Jeffrey." The cones are 6 inches long and 2 inches wide. The bract is 

 long, but not projecting, and has an evident relationship to P. 

 nobilis. The second specimen in the Edinburgh Museum is marked 

 " Pinus, sp. nova, from California, P. Lawson & Son." The cone 

 is 9 inches long by 2^ inches wide, and is bent slightly. The 

 third is marked " P. magnifica robusta, 1480, Oiegon, Mr. Jeffrey, 

 1853." The cone is 8^ inches long by 2^ inches wide, and is slightly 

 iDent. This is the species mentioned in the Trans. Bot. Soc, vol. vi., 

 p. 370, by Mr. A. Murray under the name of campylocarpa. 



