446 



Manson 



dcpressus, ad 5 cm. longas et G-7 cm. diametro, spinis subulatis 

 curvatis pubescentibus 12-13 mm. longis densissime tectns ; 

 peri car pi am crassurn, gummiferum. Semina (nondum matura) 

 plnrima, 12-13 mm. longa, hilo conspicuo, arillo magno succulento. 



Burma. At Papua, Daywin Road, Amherst, F. B. 

 collected in April, 1905. 



Vernacular name Taw dwjin or "wild durian," Burm. ; 

 Turi))i(\ Karen. 



503. Acer Osmastoni, Gamble [Aceraceas] ; species foliis 

 plerumque trilobis ; ex parte ad A. laevigatum, Wall., speciem 

 foliis indivisis, ex parte ad .4. Campbellii, Hook. f. et Thorns., 

 speciem foliis 5-7-lobis accedit ; ab hac samaris minus divergenti- 

 bus al» ilia petiolis multo longioribus differt. 



Arbor magna, ad 30 m. alta ; ramuli teretes, glabri, rufescentes, 

 graciles. Folia decidua, chartacea, opposita, juniora rufescentia, 

 aliquando indivisa ; matura in dimictio superiore 1-3-loba, basi 

 rotum lata vel paullo cordata, lobis erectis ovato-lanceolatis longe 

 caudato-acuminatis acute serratis, 12-15 cm. longa, 6-8 cm. lata ; 

 supra glabra, infra etiampraeter nervosetfloccos in axillis nervorum 

 glabra ; costae 3, ascendentes, nervis et reticulatione conspicuis ; 

 petioli graciles, 1-2 cm. longi. Cymae peduncuiatae, in paniculam 

 terminalem7-10cm. longam dispositae ; pedunculi 5-10 mm. longi ; 

 bracteae minutae, subulatae ; pedicelli graciles, 2-8 mm. longi. 

 Flores parvi, polygami, viridescentes. Sepala 5, membranacea, 

 inaequalia, ovato-acuminata, pallide flava, o-nervia, ciliata, intus 

 hirsuta, 2-8 mm. longa. Petala 5, alba, ovato-orbicularia, crenata, 

 glabra, 1-5-2 mm. diametro. Discus annularis, integer vel 

 crenatus. Stamina 8, intra discum inserta ; filamenta gracilia, 

 subulata ; antherae oblongae, emarginatae, minute papillosae. 

 Ovarium 2-loculare, sericeo-villosum ; stylus gracilis; stigmata 

 2, recurva, torta ; uvula in quoque loculo 2, pendula. Fructus ex 

 samaris 2, in angulo recto divergentibus ; alae rectae, apice 

 rotund a tae, basi contractae, venosae ; semen in quaque samara 

 unicum. 



India : in the Sikkim Himalaya at 6-7000 ft, at Darjeeling, 

 Tonglo, Rangirun and other localities in 11)04, B. B. Osmaston; 

 also at Darjeeling in 1879, Gamble, in leaf only. 



Mr. Osmaston thought this species to be probably a hybrid 

 between A. laevi {latum and A. GampbeUii but its wide distribu- 

 tion in the district seems against this supposition, although when 

 comparing together specimens of the three species it seems a 

 natural one. 



ad 



< il. CynometraBourdilloni, G«mWe[Leguminosae-Caesalpinieae] ; 

 > O. Bec/domei, Prain, et C. inaequifoliam, A. Gray, foliolis 

 <J-jugis accedit, sed foliola multo minora et fructus diversus. 



Arbor pukhra, ad 18 m. alta. et 45 cm. trunci diametro, cortice 



laevi nigro-vmdi ; ramuli sinuati, sparse lenticellati, fere nigri. 



hoha pers l8 tentia, alterna, paripinnata ; rhachis cum petiolo 



♦iTw :° nga; fo,lola 3 -J n S-% opposita, sessilia, Integra, ovato- 



pathuiata, apice emarginata, basi cuneata inaequalia, supra nitida, 

 subtns fere glanca et saepe glandulis nigria ornata, 2-5 ad 3*5 cm. 

 longa, 0-75 ad 1\, cm. lata: cost* m « m i,, ia k, 10 ; ;™«««^ 



