48 261 
Fructus immaturus, stellato-pilosus, turbinatus, alarum nervis vix 
prominulis. Fructus maturus, sphaericus (diam. 14—18 mm.), laevis, 
glaucus, apice pruinosus, calycis lobis 2 accrescentibus, coriaceis, 
glabris, parum inaequalibus, linearibus-oblongis, e basi brevissime 
angustatis, apice paulum attenuato-rotundatis (180—133 mm. long., 
larg. 20 mm.), nervis primariis 3, subtus prominulis, ditissime ra- 
mosis, calycis lobis 3 non accrescentibus, aequalibus, obtusis (10 mm. 
long., 6—7 mm. lat.). 
A spec. affin.: Dipterocarpo turbinato Gaertn. f. differt foliis brevio- 
ribus, e basi. cuneiformibus, nervis secundariis, numerosioribus, pilosis 
nec scabris, fructu sphaerico nec ellipsoideo, nervisque alarum lateralibus 
vix conspicuis. 
Jungle near Lem Dan, a very tall tree with bare stem (n° 518 a). 
2. D. angustialatus Heim sp. nov. 
Rami novelli compressi, puberulo-grisei. Rami adulti mox 
glabri, fusco-grisei, multis lenticellis punctulati. Stipulae gemmae 
acutae, angustae, fulvo-pilosae. Petioli longi, supra minute canali- 
culati, pilis fulvis, adpressis, obtecti (25—40 mm. long.). 
Folia chartacea, in sicco fusca, obovato-oblonga, basi cuneato- 
attenuata, apice attenuata, breviter acuminata (130—160 mm. long. 
— 60—80 mm. larg.), margine leviter undulata nec nitida, in pagina 
superiore pilis adpressis fulvis fugacibus, praecipue in nervo medio 
et margine, ciliata, in pagina inferiore eisdem pilis nervus medius, 
nervi secundarii (utrinque 12—15) prominuli, margine arcuati dense, 
nervique tertiarii transversales, sparsim obtecti. 
Racemi, glabrescentes, nigrescentes, 5-floriferi. Flores? 
Fructus maturus sphaericus. apice paulum turbinatus, laevis, 
apice leviter pruinosus (diam. 20 mm.), calycis lobis majoribus 
accrescentibus 3, chartaceis, glabris, aequalibus, longis, linearibus, 
angustis, basi vix attenuatis, apice paulum attenuato-rotundatis (140 
mm. long., 45 mm. larg.), nervis primariis 3, utrinque prominulis, 
ditissime ramosis, calycis lobis non accrescentibus 3, subaequalibus, 
obtusis (40—43 mm. long., 7—9 mm. larg.). 
Spec. affin. Dipterocarpo vestito Wall., cujus fructus ignotus, differt 
praecipue fulvo-pubescentia nec stellato-canescentia. 
Jungle near Klong Son, a tall tree (n° 686a). The native name of this 
tree is ,ton yang". 
Sect. Alati Dyer. 
3. D. alatus Roxb. Hort. Beng. (1814) 42. Fl. Ind. Il, 614. 
Jungle near Klong Sarlakpet (n° 742). 
Area: Pegu, Tenasserim, Siam, Cambodia, Cochinchina. 
4. D. parvifolius Heim. sp. nov. 
Rami novelli compressi, fulvi, dense tomentosi. Rami adulti 
mox glabri, nigrescentes, rugosi, lenticellis non conspicuis. Stipulae 
