264. 46 
Var. obtusifolia Heim var. nov. 
Flores? Rami novelli, foliaeque glabri; folia minora, basi apiceque 
obtusa vel ob-cordata, papyracea. Fructus immaturus, basi alarum 
longiorum omnino inclusus. 
Klong Majum, alt. 700 ft., on rocks in the jungle; a small tree (No. 595). 
Hopea Roxb. 
Sect. Huhopea. 
12. H. Schmidtii Heim sp. nov. 
Rami, racemi, flores? Folia (in specimine unica) papyracea, 
glabra, in sicco pallida, ovata, e basi attenuata, apice abrupte 
breviterque acuminata (100mm. long. — 50mm. lat.), costa supra 
tenuiter concava, subtus velutino-villosa, nervi secundarii (utrinque 19) 
tenuiter prominuli, arcuati, demum intramarginales, nervi tertiarii 
transversales, ditissime ramosi. 
Fructus maturus, ovoideus (13—14 mm. long. — 8—9 mm. lat.), 
calycis basi inclusus, apice liber. Pericarpium crustaceum; calycis 
alae 2 magnae, glabrae, nitidae, aequales, lineares, arcuate, basi 
laeviter angustatae, apice rotundatae, nervis primariis (7-9) utrinque 
tenuiter prominulis, nervis tertiariis transversalibus tenuiter ramosis; 
calycis lobi non aucti 3, breves, subaequales, ovato-rotundati (60 mm. 
long. — 50 mm. lat.); embryo ovoideus, carnosus (20 mm. long. -— 
21mm. lat.), cotyledonibus inaequalibus; cotyl. exteriore, emarginato, 
profunde bilobato, cotyl. placentar. duplo brevioris, lobis liberis. 
Jungle near Klong Son (No. 508 a). 
Sect. Dryobalanoides Miq. 
13. HH. siamensis Heim nov. sp. 
Rami, ramuli, folia, flores? Fructus (maturus) parvissimus, 
breviter pedicellatus (1 mm. long.), ovoideo-conicus (7 mm. long. — 
5mm, lat.), acumine brevissimo (1 mm.), acuto, stylopodio vix con- 
spicuo, glaberrimus, calycis lobis basi inclusus, apice liber; alis % 
laeviter inaequalibus (36—38 mm. long. — 7—8 mm. lat.), attenuatis, 
apice rotundatis, glabris, nervis primariis vix conspicuis: 7; calycis 
labis non auctis, ovato-rotundatis, brevibus (5 mm. long. — 5 mm. 
lat.), cotyledonibus carnosis, cotyl. exteriore apice emarginato, con- 
vexo-concavo, cotyl. placentar. profunde bilobato, triangulare-pyra- 
midato, radicula fere inclusa. 
Species H. Treubii Heim affinis; ab hae specie fructus exiguitate 
sat distincta. 
Jungle near Klong Son (No. 408 c). 
Sect. Hancea Heim. 
14, I. avellanea Heim nov. sp. 
Rami novelli compressi, cinereo-nigrescentes, glabri. Folia parva, 
glaberrima, in sicco avellanea, chartacea, margine revoluta, ovato- 
