CRAIB—ABIES DELAVAYI IN CULTIVATION. 279 
tion of A. Delavayi which was drawn up from Delavay’s Tali 
plant. 
One of the main points noted by Franchet is that the trans- 
verse section of the leaf approximates in outline the symbol © . 
Forrest’s plant fits exactly in this respect. The margins are so 
completely recurved that they practically touch the very pro- 
minent midrib, and throughout its length the lower surface is 
completely concealed. Further, this condition is maintained 
absolutely in Forrest’s plant up to and including the oldest 
leaves, which in the herbarium specimens are 4 years old. Now 
in Faber’s and Wilson’s plant strong recurving of the margins 
are present, but the lower surface is not completely concealed 
throughout its length, and, moreover, here as the leaves become 
older the recurving becomes less pronounced, so that the lower 
surface becomes completely or almost completely uncovered. 
Again, in Forrest’s plant the lateral leaves tend to curve out- 
wards in the lower part, but from about the middle or from just 
below the middle they curve inwards, whereas in Wilson’s plant 
when the leaves are curved the curvature is uniformly back- 
wards. The incurving of the leaves is mentioned by Franchet 
in his original description of A. Delavayi. 
Transverse sections of the leaf of the two species, while show- 
ing no absolute differentiating mark, yet afford useful compara- 
tive differences which from the available material appear to be 
constant. Both species show a well-developed hypodermis, but 
that of A. Delavayi as also the epidermis consists of conspicuously 
thick-walled cells. Below the divided fibro-vascular bundle we 
find in A. Delavayi a few sclerotic cells, whereas in A. Faberi 
sclerenchyma is not prominently developed and is not constant. 
In A. Faberi the leaf margin is more or less conspicuously 
acuminate ; in A. Delavayi the leaf margin is not acuminate or 
very shortly and very bluntly so. In A. Delavavyi the large resin 
canals are more prominent, and the cells of the lower epidermis 
are more papillose on the midrib and towards the leaf margins 
than in A. Fabert. 
Abies Forrestii, Craib, sp. nov. 
Arbor 30—-60-pedalis ; ramuli vivi iuventute primo trans- 
verse corrugatuli, dein plus minusve papillosi, brunnei, glabri 
‘vel magis minusve pilulosi, mox parum pallidiores, longitudin- 
aliter et saepe transverse fissi ; cicatrices circulares ; alabastra 
terminalia obovoidea, pallida, valde resinosa ; perulae ad annos 
5 saltem persistentes, ramulorum bases cingentes. Folia spir- 
aliter inserta, pectinatim disposita, adscendentia, in plantis vivis 
paginam inferiorem bene exhibentia, saepissime parum longi- 
tudinaliter arcuatim retroflexa, inferiora superioribus longiora, 
