326 XXXVI. BURSERACE* (oliver). [BaUamodendroti . 



describes as " simple." The numerous lateral spinose ramuli spread nearly at right angles. 

 The pedicellate flowers are fasciculate subsessile or on short 2-3-flowered peduncle • Calyx 

 deeply campanulate. Drupes obliquely ellipsoidal, apiculate. I think they also belong to 

 £. africanum. They are from Koobie to N. Shaw Valley, Baines ! Lake Ngami, Chapman ! 

 and Batoka Country, Dr. Kirk ! 



2. B. Opobalsamum, Klh. in Jnn. Sc. Nat. ii. (1824) 348. Ti-ee or 

 slirub, wUoUy glabrous or the extremities and leaves occasionally finely pu- 

 bescent, unarmed. Leaves scattered or in fascicles of 2, 3, or more, from 

 short or suppressed lateral branchlets often under 1 in. in length, 3-5-folio- 

 late, very rarely 1-foliolate with a distinct common petiole ; leaflets obovate 

 or oblanceolate, obtuse or broadly acute, entire or obscurely undulate. 

 Calyx campanulate, shortly 4-toothed. Fruit ovoid or ellipsoidal, smooth, 

 glabrous, apiculate. — B. pileadense, Kth. ; Berg in Bot. Zeit. 1862, 163. 

 B. Ehrenbergiauum, Berg, 1. c. 



Nile Land. Nubia, Schweivfurth ! 



Arabia and perhaps also in Beloochistan. 



I have had but iusuflicient material for examination. 



3. B. pedunculatuin, KotscJiy et Peyr. in PI. Tinn. 11. ^. 5. B. Small 

 tree with 'erect terete striate branches, pubescent the first year, at length gla- 

 brous. Leaves more or less fascicled at the extremities, 1^-4 in. long, 5- 

 1 1 -foliolate ; leaflets sessile, oval or oblong, acute, serrate-dentate, pubescent 

 or shortly pilose on both sides, ^-1 in. long, Plowers clustered, subsessile 

 or shortly pedicellate, in pedunculate, axillary, few-flowered cymes. Calyx 

 urceolate-campanulate, 4-toothed, teeth triangular. Petals oblong-spathu- 

 late, pubescent externally. Stamens alternately shorter ; anthers muticous 

 or (jbscurely mucronulate. Fruit not described. 



Nile Iiand. On the Bahr Ghasal, a tributary of the Upper Nile, Heuglin ; Sennar, 

 Cienkovjski ; Kordofan, Kotschy. 

 I have not seen a specimen. 



4. B. Playfairii, Hook. f. in Herb. Kew. Glabrous, spinose ; spines 

 slender, rigid, very acute, \-\ in. long or tenninating lateral leafy 

 ramuli. Leaves fasciculate, 3-foliolate, coriaceous, glabrous ; median leaflet 

 obovate to oblanceolate, broadly pointed or shortly and abruptly apiculate, 

 narrowed below, entire or obsoletely and remotely crenulate-serrate, about \ 

 in. long, \-\ in. broad ; lateral leaflets much smaller. Petiole not exceeding 

 1 line, or leaves subsessile. Calyx very short, 4-partite, lobes ovate-deltoid, 

 persistent. Anthers muticous. Petals not seen. Drupes subsessile, \ in. 

 long, ellipsoidal, rather acute when dry. 



Nile Land. Somali Coast, Col. Pi ay fair I 



Said to afford the Hotai resin. This shrub belongs to the genus Balsamoph/ceos o^ Berg 

 (Bot. Zeitung, 1862, 163), which, however, can hardly be maintained as distinct from Bal- 

 samodendrov . This plant must be very nearly allied to, if not identical with, B. Kataf, 

 Kth. {Balsamophlceos, Berg. 1. c), which Drs. Schwehifurth and Ascherson report from 

 Abyssinia and Nilbia. I have not, however, h^d specimens for comparison. 



5. B. molle, Oliv. Shrub or small tree with pubescent annual slioots, 

 unarmed or spinescent. Leaves usually fascicled at the ends of the lateral 



