324 xxxvi. BURSERACEiE (oliveh). [Boswellia. 



the ends of the branches. Pedicels equalling the calyx or usually shorter 

 than the flowers, which are about £ in. across when expanded. Calyx-lobes 

 5, deltoid. Disk free, undulate, persistent. Ovary glabrous, narrowed into 

 the rather thick style. Stigma obtuse, scarcely capitate. Capsule 1 in. 

 long, clavate-trigonous, shortly narrowed above to an obtuse extremity 

 tipped by the remains of the style, narrowed to about twice the length 

 below. Seeds each enclosed in a separate bony endocarp acutely and 

 abruptly pointed below. — Amyris papyri/era, Delile, Voy. a Meroe, 

 Flussleajloribunda, Endl. Iconog. 56. t. 28. 



Nile Land. Abyssinia, Schimper ! Sennar, Kotschy ! Cienkowski. 

 Forming entire forests in the country of Bertat {Delile). 



»9. 



Probably distinct species of Boswellia, of which the flowers and fruit are unknown. 



1. Niger, Barter. Leaves multifoliolate, 1-1 \ ft. Leaflets alternate, coriaceous, oblong- 

 lanceolate, obtuse, obliquely rounded or the upper margin truncate at the base, broadly 

 toothed, the largest about 6 in. by 2 in., soft to the touch with minute pubescence orX 

 length glabrous above, pale and glaucous beneath ; midrib and lateral veins darker, rather 

 prominent. 



2. Madi, White Nile, Speke and Grant. Leaves multifoliolate, glabrous, 1-14 ft. Leaf- 

 lets alternate coriaceous oblong-lanceolate obtuse or rather acute, rounded and very unequal 

 at the base, rather wavy or distantly and broadly toothed, the largest (about one-third from 

 the end) 5 in. by 1 J in. ; lower leaflets considerably smaller, shining and reticulated above, 

 glaucous with prominent midrib and reticulation beneath ; petiolules very short. 



3. Somali Country, Col. Play/air, ' Yegaar,' affording the resin Luban Maiiee. Extre- 

 mities terete, ^-^ in. diam., with deciduous papery epiderm. Leaves 2-4J in. long, 7-"- 

 11-foliolate, in terminal and lateral tufts, coriaceous, glabrous, and very glaucous above aud 

 below with obscure reticulation ; leaflets opposite or subopposite, ovate-oblong or -rotundate ; 

 apex very obtuse or rdunded, lateral leaflets cordate or subcordate, very wavy, sessile, f-1 

 in. long. Stated to grow near the coast, out of smooth limestone rock. 



4. Bunder Murayah, Somali Country, Col. Play/air. ' Mohr Add' (White). Bark se- 

 parating in membranous flakes. Leaves in terminal tufts, 4-1 ft. or rather more in length, 

 multi-(ll-17)foliolate, coriaceous glabrous or on expansion obsoletely puberulous, white and 

 glaucous beneath ; leaflets mostly opposite or subopposite, oblong-lanceolate, more or less 

 obtuse, base cordate or subcordate, entire or sinuous, reticulated beneath, the network 

 usually relieved by the glaucous interstices, 1-24 '•»• by £-| in. Found further inland than 

 the ' Yegaar,' about the summits of hills. 



5. Somali Country, Col. Play/air. ' Mohr Madow ' (Black) with the preceding yielding 

 the Luban Bedowi, the Olibanum of commerce. Leaves 8-12 in., 15-17-foliolate, pubes- 

 cent or glabrescent above. Leaflets coriaceous, sessile, elliptic- or ovate-oblong, very obtuse, 

 cordate or subcordate at the base, irregularly sinuous or entire, rather soft to the touch 

 above with a short or obsolete pubescence, beneath paler, minutely pubescent-tomentose, 

 midrib and lateral veins rather prominent, l$-2 in. by f-1 in., or terminal leaflet larger. 

 Also inland, usually in the valleys and lower parts of the hills. 



6. Somali Country, Col. Playfair. Also labelled (through mistake ?) ' Mohr Madow ' 

 (perhaps Boswellia papyrif era). Leaves 6-10 in., multifoliolate, pubescent. Leaflets sub- 

 opposite or alternate, coriaceous, sessile, oblong or oblong-lanceolate, obtuse ; base more or 

 less cordate, crenate or crisped, shortly pubescent, rugose beneath with prominent venation, 

 1-14 in. by \-\ in. 



2. BALSAMODENDRON, Kth. ; Benth. et Hook. f. Gen. PL i. 323. 



Flowers polygamous. Calyx campanulate or shortly tubular, 4-toothed, 

 persistent. Petals 4, erect or with recurved tips, linear- or oblanceolate- 



