166 The Philippine Journal of Science wis 



are not distinguished from that of Hopea plagata and, like it, 

 are known by the name of yacal. The name yacal is properly 

 applied to any wood of this grade or to the tree that produces 

 such wood. Species producing yacal are the following : 



Hopea plagata (Blanco.) Vid. Skorea balangeran (Korth.) 



H. foxworthyi Elmer. Dyer. 



H. odorata Eoxb. S. ciliata King. 



H. malibato Foxw. S. astylosa Foxw. 



Balanocarpus cagayanensis S. malibato Foxw. 



Foxw. S. falciferoides Foxw. 



B. brachyptera Foxw. S. scrobiculata Burck. 

 Isoptera borneensis Scheff. 



It is thought that several other species belong here ; but their 

 identification is still in doubt. Yacal is the most valued of any 

 of our dipterocarps. It is the sixth Philippine wood in order of 

 abundance, making up about 3 per cent by volume of our forests. 



MANGASINORO 



This is a pale yellow, rather coarse-grained lauan, with the 

 vessels arranged in a reticulate pattern. It is evident that the 

 wood is the product of several species, whose identity is not 

 understood. Kalunti is a rather poor grade of mangasinoro and 

 is the product of Shorea mindanensis Foxw. Mangasinoro is the 

 seventh in order of abundance of the Philippine woods and makes 

 up something more than 2.5 per cent of the volume of the forest. 



PALOSAPIS, OR MAYAPIS 



This is furnished by the different species of the genus Anisop- 

 tera. They are: Anisoptem thurifera (Blanco) Bl., A. curtisii 

 Dyer, A. brunnea Foxw., A. mindanensis Foxw., and another 

 species, which has not yet been described. 



Palosapis seems to rank about tenth in order of abundance 

 among Philippine woods and to make up about 1.5 per cent of 

 the volume of the forests. 



MANGACHAPUY, OR DALINGDINGAN 



This is a wood lighter in weight and color and rather softer 

 than yacal. It is sometimes quite difficult to determine whether 

 a wood is a yacal or a dalingdingan. Usually the harder and 

 finer-grained forms of dalingdingan are furnished by species that 

 attain a rather small diameter. So far as known, all of our 

 dalingdingans are furnished by species of Hopea. Some of these 

 species are: 



Hopea acuminata Merr. H. philippinensis Dyer. 



H. basilanica Foxw. H. glutinosa Elmer. 



H. mindanensis Foxw. H. maquilingensis Foxw. 

 H. pierrei Hance. 



