— 46 — 



Var. obtiisifolia 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. Euhopea. 



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 (100 mm. long. — 50 mm. lat.), costa supra 

 tenuiter concava, subtus velutino-villosa, nervi secundarii (utrinque 19) 

 tenuiter prominuli, arcuati, demum intramarginales, nervi tertiarii 

 transversales, ditissime ramosi. 



Fructus maturus, ovoïdeus (13 — 14 mm. long. — 8 — 9 mm. lat.), 

 calycis basi inclusus, apice liber. Pericarpium crustaceum; calycis 

 alae 2 magnae, glabrae, nitidae, aequales, lineares, arcuatæ, 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 ovoïdeus, carnosus (20 mm. long. — 

 i21 mm. lat.), cotyledonibus inaequalibus ; cotyl. exteriore, emarginato, 

 profunde bilobato, cotyl. placental', duplo brevioris, lobis liberis. 



Jungle near Klong Son (No. 508 a). 



Sect. Dryobalanoïdes Miq. 



13. H. siamensis Heim nov. sp. 



Rami, ramuli, folia, flores? Fructus (maturus) parvissimus, 

 breviter pedicellatus (1 mm. long.), ovoïdeo-conicus (7 mm. long. — 

 5 mm. lat.), acumine brevissimo (1mm.), acuto, stylopodio vix con- 

 spicuo, glaberrimus, calycis lobis basi inclusus, apice liber; alis 2 

 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. placental*, profunde bilobato, triangulare-pyra- 

 midato, radicula fere inclusa. 



Species H. Treubii Heim affinis; ab hac specie fructus exiguitate 

 sat distincta. 



Jungle near Klong Son (No. 508 c). 



Sect. Hancea .-Heim. 



14. H. avellanea Heim nov. sp. 



Rami novelli compressi, cinereo-nigrescentes, glabri. Folia parva, 

 glaberrima, in sicco avellanea, chartacea, margine revoluta, ovato- 



