OF THE WOOD OF INDIAN SPECIES OF PINUS. 489 
EXPLANATION OF THE PLATES. 
PLATE 24, 
=; 
— 
22 
= 
The magnification is 312, excepting in the cass o 
Figs. 11 & 12 (x 240 circa), Fig. 51 (x 12). 
ig. 17 (X020), Fig. 18 ( x 140), and 
Pinus Gerardiana. 
Fig. 1. Fusiform ray, tangential section. 
2. Parenchyma and parenchyma-tracheids adjoining resin-duct. 
3. Ray-parenchyma in summer-wood, radial section, 
4. Medullary ray in spring-wood, radial section. 
5. Uniseriate medullary ray, tangential section, 
6. Spring-tracheid, view of radial wall. 
7. Outer summer-tracheid, view of tangential wall. 
8, Summer-tracheid, view of radial wall. 
Pinus excelsa. 
Fig. 9. Medullary ray in spring-wood, radial section. 
10. “ Distended " medullary ray, radial section. 
11. Medullary ray with lobed marginal ray -tracheids, radial section. 
13. Medullary ray with very narrow ray-tracheids, radial section. 
13. Fusiform ray, tangential section. 
14. Outer summer-tracheid, view of tangential wall. 
15. Summer-tracheids, radial section. 
16. Spring-tracheids, view of radial walls. 
17. Uniseriate ray, tangential section of ray-parenchyma. 
Pinus longifolia. 
Fig. 18. * Double annual ring,” transverse section. 
19. Fusiform medullary ray, tangential section. 
90. Thick-walled parenchyma adjoining resin-duct and medullary ray, tangential 
section. 
9]. Summer-tracheids, radial section. 
92. Tangential section showing a transverse section of a ** Sanio's bar.” 
23. Medullary ray in summer-wood, radial section. 
24. Medullary ray in spring-wood, radial section. 
95. Uniseriate medullary ray, tangential section. 
26. Spring-tracheid, radial section. 
PLATE 25. 
Pinus Khasya. 
Fig. 27. Medullary ray, radial section. 
28, Tangential section showing a wood-tracheid cut transversely. 
29. Radial section, showing pits on the terminal, radial, and tangential walls of 
tracheids. 
30. Summer-tracheid, showing pits on tangential and radial walls, tangential 
section. 
LINN. JOURN..—BOTANY, VOL. XLI. 20 
