658 GENERAL VIEW OF THE GENUS PINUS. 
1902. Medwejew, Tifliser botanischen Garten (1902), ex ‘ Le 
Jardin,’ October 1903. 
Pinus eldarica, sp. n.? 
A species only known to me by the above reference. It 
is said to be like P. bruttia and P. halepensis, but differs 
from both. 
1903. Rowlee, W. W., Bulletin Torrey Bot. Club, xxx. Feb. 
1903, p. 107. 
cubensis, var. anomala. Pinus terthrocarpa in part. 
recurvata. — bahamensis, teste Shaw. 
Shaw, in Sargent, Trees and Shrubs, i. p. 149. 
— terthrocarpa. 
EXPLANATION OF THE PLATES. 
The photographic reproductions from the original slides were made by 
Mr. A. E. Smith, and show transverse sections of the leaves magnified 
50 diameters. 
Puate 20. 
Fig. 1. Pinus sylvestris, section half-cylindric ; resin-canals marginal, sur- 
rounded by stereome-cells ; cells of the cortex plicated ; endoderm of 
- about 50 cells; meristele transversely oblong in section, somewhat 
depressed in the centre on the upper surface ; fibro-vascular bundle 
branched, branches widely divergent. 
Fig. 2. Pinus Cembra, section 3-sided ; onejresin-canal distinctly median, two 
others less so, but yet separated from the hypoderm by one layer of 
cortical cells, and therefore not truly marginal or subepidermal ; 
canals surrounded by stereome; cells of cortex not plicated ; endo- 
derm of about 22 cells; meristele circular in section ; fibro-vascular 
bundle simple. 
Fig. 3. Pinus cubensis, showing 3-sided leaf, resin-canals internal ; meristele 
somewhat triangular in section ; fibro-vascular bundle simple or with 
two branches united. 
Puate 21. 
Fig. 4. Pinus monophylla, showing circular section, three layers of hypoderm ; 
marginal resin-canals encircled by stereome ; plicated mesophyll- 
cells; meristele circular, surrounded by an endoderm of about 60 cells ; 
fibro-vascular bundle simple, with well-marked transverse bands of 
phloem and xylem and with scattered stereome-cells in the pericycle. 
Fig. 5. Pinus Donnell-Smithii, leaf with one convex and two concave sides ; 
hypoderm double; cortex-cells plicated; endoderm-cells about 36 ; 
meristele triangular ; fibro-vascular bundle branched. 
Fig. 6. Pinus filifolia, leaf 3-sided ; hypoderm in two layers, with projecting 
processes ; resin-canals median, surrounded by stereome; endoderm- 
cells about 30; meristele somewhat triangular ; fibro-vascular bundle 
branched. 
nt Sates 
