640 
Tasie X VIII—Continued. 
Name of plant. A. | B. | C.| D | E. | F, 
— = \_ | -_ 
| CAP TIATONGN SODIBUIE soos. ocaodeoagaceoac-v penne ndeoaplanuews el Red (Seo 2 | Bole 
WB OEP aS 7 i a a A Lote eee er Weta. 09) Aeon 
| CELTS PUR OM oe as oak chs eee au sececlanent i hy eae Se | 
| 46, (iamndiele Cm DPiesm -.. 4.8... 345-55 tee nee leans 1 it eee : ill Serena 
677 WAONIE ON 2.22 dons see Ss egan doses lagen Se Fa ale ae bs | see : ae 
| ABt ae POMOGU e 6 oe i a nena cece cnedacaenateae|oo~ : (i Pas ae i Sa 
Fee MS DTS bs Le Pia ee en ee eS eee ene Pa eRREN, | er AN ee Hh ete 
1 BO OPE TITOTe BITIREITOR 5 sds conan en ca~s ncn kver sebeeo na == gh (Sas me : i eee 
| 61. Mitrephora lanotan __.....-...-------------------------- Saree es 4 aaa | ee | 
| 52. Pithecolobium acle___.-__--------------.---------------- pees eee Seotared 5 | 
Bhs Saree ees Sa TORONTO os he eee ES te | : i nee Hh ee 
| BARR euMe WA MONh oe as cc nce haa a, aaa — 1 | eS 
86, Parnatroemia-toquian 22 se r=. jae a. | soe | ae |} 1 |------ | 
haces ares a ectecdononne 88 | 92} 147 | ap 5 eee 
It will be seen from Tables XVII and XVIIT that three members of 
the Dipterocarpacee, namely, Dipterocarpus grandiflorus, Shorea poly- 
sperma, and S. contorta, comprise 31.6 per cent of all the trees in the 
plots measured. With the exception of Calophyllum wallichianum, 
Santiria nitida, Bugenia glaucicalyx, and a few others, these trees make 
up nearly the whole of the upper story vegetation. Attention has already 
been called to the fact (see p. 420) that in this formation these trees in 
places form a similar crown class and that in correspondence with this 
there is a less development of board roots. (See Pl. XXIV.) 
Trees which may reach a crown class slightly lower than the Dipterocar- 
pacew are Ternstroemia toquian, Diospyros pilosanthera, Litsea sp., Cin- 
namomum mercadoi, and others. Prominent, because of the three striking 
board roots, is Hugenia glaucicalyx. (See Pls» XXII and XXVIII.) 
A reference to the tables descriptive of the other formations will show 
that with the exception of Dipterocarpus grandiflorus all the species 
found in this one are also present in others. In this plot Parkia 
rorburghii, with two trees, reaches its highest altitude. Albizzia procera, 
another species of the Bambusa-Parkia formation, is likewise represented 
by one specimen and the upper limits of Pterocymbium tinctoriwm and 
Pithecolobium acle are also found. . 
On the other hand, species which become more prominent in the next 
formation higher up the mountain are introduced for the first time. 
Prominent among these are Vernstroemia foquian, Plectronia viridis, 
Symplocos oblongifolia, and Bacoecaria philippinensis. In this forma- 
tion Anisoplera vidaliana occupies a subordinate position and it-entirely 
disappears from the forests a short distance above its upper limits. 
The presence of Dipterocarpus grandiflorus in a narrow belt at this 
altitude, where it becomes the most important tree, is undoubtedly due 
to more favorable climatic conditions than exist below this altitude. Why 
