198 XXXV. BUESERACE.?:. 



at tlie ba=e or margin of the disk, equal or unequal : filaments free, 

 rarely connate at the base ; staminodes ; anthers usually versatile, 

 2-c'elied. Ovary free, 2-5- (rarely 1-) celled, usually attenuated into a 

 short style ; ovules 2 (very rarely 1) in each cell, axile, usually pendu- 

 lous, rarely ascending ; niicropyle superior ; raphe ventral ; stigma 

 undivided or 2-5-lobed. Fruit drupaceous, usually indehiscent, con- 

 taining 2-5 pyrenes, or rarely pseudo-capsular and dehiscent. Seeds 

 pendulous ; testa membranous ; all)umen 0. — Distrib. Tropics of both 

 hemispheres; genera 18; species about IGO. 



Drupe dehiscent ; pjrenes separating 1. Boswellia. 



Drupe indehiscent ; pyrenes not separating. 



Calvx 5-fid ; disk lining the calys-Uibe 2. Gauuga. 



Calyx 4-toothed ; disk cupular 3. Commii'hora. 



Calyx usually 3- fid ; disk annular 4. Canarium. 



1. BOSWELLIA, Eoxb. 



Trees usually with papery bark. Leaves alternate, crowded at the 

 ends of the branches, deciduous, impari pinnate ; leaflets opposite, 

 usually serrate. Tlowers hermaphrodite, small, white, in axillary 

 racemes or panicles. Calyx small, o-toothed, persistent. Petals 5, 

 narrowed at the base, imbricate. Disk annular, crenate. Stamens 10, 

 alternately long and short, inserted at the base of the disk. Ovary 

 sessile, 3-celled ; ovules 2 in each cell, pendulous ; style short ; stigma 

 3-lobed. Drupe trigonous, 3-valved, valves separating from the 

 pyrenes ; pyrenes bony, 1-seeded, iiually separating from the trigonous 

 axis. Seeds compressed, pendulous ; cotyledons contortuplicate, mul- 

 tifid ; radicle superior. — Distrib. India ; Tropical Africa ; species 

 about 6. 



1. Boswellia serrata, Roxh. ex Caleb. As. lies. v. 9 (1807) p. 379, 

 t. 5. A deciduous middle-sized tree ; bark ash-colored, peeling off in 

 thin flakes ; young slioots and leaves pubescent. Leaves 8-15 in. long ; 

 leaflets opposite, l--i by I-I5 iu., sessile, 8-15 pairs and an odd one 

 (the pair at the base of the leaf often much smaller thnn the others), 

 variable in shape, ovate or ovate-lanceolate, usually inequilateral and 

 obtuse, crcnate-serrate, more or less pubescent, base acute, rounded, or 

 somewhat truncate. Flowers in axillary racemes, shorter than the 

 leaves. Calyx pubescent outside ; lobes broadly triangular-ovate. 

 Petals ^ in. long, ovate, pubescent outside, ti])s inflexed. Stamens 

 inserted at the base of an annular crenate disk ; anthers slightly pubes- 

 cent. Ovary suiTounded by the disk : style grooved. Drupe trigonous; 

 pyrenes heart-shaped ; cotyledons tritid. Fl. B. I. v. 1, p. 528 ; Talb. 

 Trees, Bomb. p. 30; Woodr. in Journ. Bomb. Nat. v. 11 (1897) p. 268; 

 Watt, Diet. Econ. Prod. v. 1, p. 515. Boswellia tlmrifcra, Koxb. ex 

 Fleming, in Asiat. Ees. v. 11, p. 158; Grab. Cat. p. 42. — Flowers: 

 Feb.-Apr. Vern. Sdlai; Sdlphuli. 



Konkan: S/or/i.tl, Nhnmo ex Graham. Dkccan : S/ilpudns of the Khandesh dis- 

 ict, Talbot; hills in the Jjcccan, widely, ICuoc/mw ; Kartriz and Kamatki (ilii.-its on 

 10 road to Maiiahlcsliwar, H. M. Ilirdwond; hill-sides, Poona districts, Woodrow; 

 jungles, Khandesh district, 7l<-?«?Y/.«r! S.M. Country: hill of Shcndiir in the 

 :huri taluka, Belgauui CoUcctorate, Law ex Graham. — Distrib. Throughout 

 a. 



Var. rjlnhra, Hook. f. Fl. B. I. I.e. Glabrous; leaflets entire or 



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