22,3 Reyes: Woods of the Philippine Dipterocarps 323 



ous, visible to the naked eye. Resin cysts diffuse or rarely in 

 interrupted concentric rings. Grain straight or rarely crossed. 

 Wood medium hard and medium heavy; specific gravity, 0.399, 

 Gardner, 0.857. 



Microscopic features. — Vessels large, 158 to 250 n in diam- 

 eter ; tyloses inconspicuous. Tracheids absent. Fiber tracheids 

 present as in Dipterocarpus. Libriform fibers without distinct 

 radial arrangement, 22 to 28 by 1,270 to 1,930 /*• Vertical 

 parenchyma vasicentric and diffuse, the latter very prominent. 

 Resin cysts diffuse-rounded. Organic infiltration scarce. Idio- 

 blasts wanting. 



Remarks. — Two species, A. thurifera and A. curtisii, are com- 

 monly found in the markets, both reaching large size. 

 Key to the common commercial species of Anisoptera. 

 1. Pores over 200 a* in diameter; libriform fibers slender and long, 22 by 

 1,600 m; wood rays large, 6 by 100 cells. 



Palosapis (Anisoptera thurifera). 



Pores under 200 ^ in diameter; libriform fibers stout and short, 26 by 

 1,270 H wood rays smaller, 5 by 37 cells.. Dagang (Anisoptera curtisii). 

 ANISOPTERA THURIFERA (Blanco) Blume. Palosapis. (Plate 14.) 



Gross features. — For color of the wood see group character- 

 istics. When freshly cut the heartwood often shows rose green 

 which color fades out after a few hours' exposure to the air. 

 Wood coarse textured, fairly straight grained, moderately hard 

 to hard, moderately heavy to heavy; specific gravity, 0.793. 



Microscopic features. — Vessels large, 54 to 265 ft (average, 

 210) in diameter, rounded or ovoid in transverse section, 

 diffuse; tyloses scarce. Tracheids wanting. Fiber tracheids 

 fewer than in Dipterocarpus, not sharply differentiated from 

 libriform fibers. Libriform fibers numerous, 22 by 1,600 ?, 

 with walls 8.5 fi in thickness. Vertical parenchyma vasicentric 

 and diffuse. Resin cysts rounded on transverse section, dif- 

 fuse ; epithelial cells flattened. Idioblasts wanting. Wood rays 

 heterogeneous, attaining a maximum size of 6 by 100 cells in 

 transverse section; organic infiltration inconspicuous. 



Remarks. — Used for temporary construction and cheap fur- 

 niture, but not durable in Contact with the soil. The wood of 

 this species is frequently substituted for manggachapui (Hopea 

 acuminata) , a higher grade of timber, but can be distinguished 

 from the latter by its coarser texture and larger pores which 

 are plainly visible to the naked eye. In addition, the resin 

 cysts of manggachapui are arranged in concentric rings. 



