252 FOXWORTHY. 
entire. The petiole has quite a considorahle variation in length. The 
fruit varies in size and shape and in length of wings, as well as in the 
degree of dcvclopTnent of the fruit wings, which are usually quite papery 
hut may be reduced to little more than ridges. There seems to l>e an 
almost complete series of intergi-ades between the typical fruit for this 
species and the very much more woody fruit of I), speciosus. It seems 
likely that these species hybridize, where tliey occur in the same region. 
The fruit-wing? are of varying length and there may be three long wings 
developed or only one. The stipules, in the terminal bud, elongate to 
such an extent before falling that they give the plant the appearance of 
belonging to an entirely different species. I have seen these enlarged 
stipules as much as 2 dm long. They are much in evidence on the 
ground Just after the leaves have fallen. 
D. grandiflorus is often found on dry exposed ridges up to 500 m 
above sea level, but it also does well on flat land which is more moist. 
It seems to be the principal source of the balao or wood oil in the 
Philippines. 
It has been found in flower in the months of January, February, March, 
April, May, June and December, and in fruit in the months of January, 
February, May, June, August and September. 
Luzox, Province of Cagavan, For. Bur. 7061 Klemme, May 1907, in flower, 
For. Bur. 13102 Bernardo, A*pril 1909, in flower, For. Bur. 13/,21 Klemme, April 
1900, in flower, For. Bur, W19, V^IH Darling, For. Bur. 1602^ (from Palaui 
Island), 160^1, 16959, rtOJify, llOGl, 17167, 1718.9 Curran, For. Bur. WiH Al- 
varez: Province of Isabela, i^or. Bar. lJfS37 Darling, May 1009. in fruit: Prov^ 
ince of Ilocos Sur, For, Bur. o658 Klemme: Province of Abra. For. Bur. 1)657 
Darling, Feb. 1909, in fruit: Subprovinee of Benguet, Elmer 64oS, June 1904, 
in fruit: Province of Pan-asinan, For. Bur. 8335 Curran d Merritt, Dec. 190j, 
in flower, For. Bur. 13.^90 Mcdinu: Province of Xueva Ecija, For. Bur. 22S72 
Alvarez: Province of Zambales, Cuming 1073, Hallier 306, For, Bur, 91'/ M^i^f^^^ 
For, Bur. 5812, 6917 Curran, For. Bur. 6021 Aguilar, For. Bur. 8115 Curran if 
Mcrriti, Dec. 1907, in flower, For. Bur. 8U7 Curran & Merrift: Province^ of 
13ataan, Ahem 755 Hereford, Mhiiford Hjo, June 1904, in fruit, M'hHfor<i "^•'' 
Sept. 1904, in fruit, ^ViUiams .90}, For. Bur. 186 Barnes, Jan. 1904, iu flower, 
For. Bur. 559 Barnes, For. Bur. 2908 Borden, Mar. 1905, in flower, For. Bur. 
59J,1, 5DJt3 Curran, Jan. 1907, in flower and fruit, For. Bur. €228 Cm ran, Feb. 
1907, in flower. For. Bur. 7231 Curran, June 1907, in flower. Bur. 8ci. i^^^ 
Foxworthy, For. Bur. 129 ',7 Alvarez, For. Bur. 20022 Topacio : Province of Bu- 
lacan, Vidal 986, For. Bur. 7177 Curran, June 1907, in fruit. Bur. Sci. 12268 
Foxicorthy: Province of Ki/^d, For. Bur. 2867 Ahein's eoU., Mar. 1905, iu flower: 
Province of La Lagunu, P'or. Bur. 17639 Curran, For. Bur. 22237 Mariano: Prov- 
ince of Tayabas, For. Bur. s. n., 3222, 3209 Hugger, April 1905, iu flower. For, 
Bur. 10195 Curran, For. Bur. 18665 Darling: Province of Caniarines, For. Bvr. 
10717 Curran: Province of Albay, For. Bur. lOGl-i Cur} an. Mindoro, For. Bur. 
6160, 6811, 8802 MerritU Samar, For. Bur. 12S50 Roscnhluth. KegROS, Ginm- 
gaan River, Whitford 1586, 1622, For. Bur. 5501 Frerett, For. Bur. 13595 1^^.'/''' 
d Foxirorthy. Aupr. 1909, in fruit, For. Bur, 17481, 17'fS6, Curran. For. ;?'"'■ 
» 18223 Roscnhluth, For. liur. 15021 Dattao, Mar. 1908, \u flower. Palawan, /'"'• 
Bur. 150-'f5 Danao. 
