J XXXV. ocHNACE^. (Alfred W. Bennett.) 527 



plant, but is only imperfectly known. Planohon (Hook. Lond. Journ. Bot. v. 64) sug- 

 gests that it may be Gfomphia numatrana, with which, however, the description of the 

 leaves does not appear to agree. Wallioh describes it as having elliptic-lanceolate 

 leaves tapering at both ends, finely acuminate, sharply and minutely serrulate, the 

 nerves reticulating and uniting in two or more submarginal arches. — .Native of Sinca- 

 pore and the contiguous islands. 



Order XXXVI. BURSERACE^. (By Alfred W. Bennett, P.L.S.) 



Balsamiferous trees or shrubs. Leaves alternate (very rarely opposite), 

 imparipinnate or trifoliolate (very rarely unifoliolate), stipulate or ex- 

 stipulate. Injiorescence racemose or paniculate. Flowers regular, small, 

 hermaphrodite or often polygamous. GaLyx free, 3-6-lobed, imbricate or 

 valvate, often minute. Petals 3-6, distinct, rarely connate, imbricate or 

 valvate. Disk annular or cupular, usually conspicuous, free or adnate to the 

 base of the calyx. Stamens as many or twice as many as petals, inserted at 

 the base or margin of the disk, equal or unequal ; filaments free, rarely 

 connate at the base, smooth, ; anthers dorsifixed rarely adnate, 2-locular, 

 dehiscing longitudinally. Ovary free, rarely 1- more often 2-5-ceUed ; 

 style simple, stigma undivided or 2-5-lobed ; ovules 2 or rarely 1 in each 

 cell, anatropous, axile, usually pendulous rarely ascending, micropyle 

 superior, raphe ventral. Fruit drupaceous, indehiscent, containing 2-5 

 pyrenes, rarely pseudo-capsular and dehiscent. Seeds solitary, pendulous, 

 testa membranous, albumen ; cotyledons usually membranous, contortu- 

 plicate, rarely fleshy and planoconvex, radicle superior. — Distbib. Tropical 

 regions of both hemispheres; genera 16-18 ; species about 160. 



' Drupe valvately dehiscent, pyrenes separating. 



Drupe trigonous .... ... . . . . 1. Boswellia. 



Drupe broadly 3-winged . . . . . ... 2. Tkiomma. 



Drupe indehiscent, pyrenes not separating. 

 Stamens 6-10. 

 Calyx 5-fid, urceolate. Disk clothing tube of calyr . . 3. Gahuoa. 

 Calyx 4-toothed, urceolate. Disk cupular. Flowers few, 



fasciculate 4. Balsamodendkon. 



Calyx 4-6-toothed, small. Disk clothing base of calyx. 



Stamens 8-10. Inflorescence paniculate ..... 5. Peotidm. 

 Calyx 4^6-lobed, imbricate. Disk annular. Stamens 



8-10 .... . . .6. BnESBEA. 



Calyx usually 3-fid, valvate. Drupe ellipsoid, usually 



trigonous; style terminal . . 7. Canakium. 



Calyx 3-fid, valvate. Drupe usually gibbous; style 



lateral .... 8. Sahtiria. 



Calyx 3-partite, large, valvate. Drupe globose ... 9. Teioonochlamts. 

 Stamens 5 10. Pilicium. 



1. BOSWEZiIiXA, Boxb. 



Balsamiferous trees, bark frequently papyraceous. Leaves alternate, exsti- 

 pulate, imparipinnate, deciduous, with opposite sessile usually serrate 

 leaflets. Flowers small, white, hermaphrodite, in axillary racemes or 

 panicles. Calyx small, 5-toothed, persistent. Petals 5, distinct, narrowed 

 at the base, imbricate. Bisk annular, crenate. Stamens 10, 5 long 5 short, 

 inserted at the base of the disk. Ovary sessile, 3-celled ; style short, stigma 

 3-lobed ; ovules 2 in each cell, pendulous. Drupe trigonous, containing 3 

 1-aeeded pyrenes which finally separate. Seeds compressed, pendulous. — 

 DiSTEiB. India and Tropical Africa ; species about 6. 



