332 LVII. BUESEEACE^. 



the calyx-tube. Stamens usually twice as many as the petals, rarely as many, inserted 

 at the margin or base of the disk, equal or unequal, or the alternate longer; filaments 

 free, naked, subulate, stamiuodes ; anthers oblong or subglobose, often versatile. 

 OvAET free, trigonous, ovoid or globose, 2-5-eelled, usually contracted into the short 

 style; s%ma undivided or 2- 5-lobed; ovules 2 (rarely 1) in each cell, usually col- 

 lateral and pendulous from the top of the cell, rarely ascending ; micropyle superior 

 and raphe ventral. Fruit a drupe, indehiscent, with 2-5 pyrenes, or with a bony 

 or thin endocarp, or a capsule with the epicarp dehiscing and exposing bony cocci, 

 which are connate, and separate from a central column. Seeds pendulous, testa 

 membranous, albumen 0; cotyledons usually membranous, contortuplicate, rarely 

 plano-convex or thick ; radicle superior. 



Tribe I. Bueseeb^. — Ovary 2-5-celled. 



a. Calyx free. Petals free. Drupe with a valvate epicarp and 3 separable 

 pyrenes. Boswellia, Trionema. 



h. Calyx free. Petals free. Drupe with a valvate epicarp and 3 connate 

 pyrenes. 



* Stamens 6-10. ** Stamens 5. 



Garuga. Balsamodendron. Filicium. 



Protium. Bursera. Ganojphyllum. 



Ganarium. Santeria, &c. Nothoprotium. 



c. Calyx free. Corolla gamopetalous. Trattinichia, Hedivigia. 



d. Calyx adnate to the ovary. Darryodes. 



Tribe II. AMTRiDEiE. — Ovary 1-celled. Amyris, Remprichia. — Ed.] 



Burseraceai, whose close affinity to Terehinthacece we have noticed, and to which has been annexed 

 the genus Amyris (which only differs in its one-celled ovary and generally opposite leaves), yield spon- 

 taneously, or by incision of their stems, balsamic resinous substancss, employed in medicine. The incense 

 called Olibanum is a resin of balsamic odour and stimulating properties, obtained from Boswellia thurifera, 

 an Indian tree ; the Arabian incense is the product of one or more allied species. The resin Elemi of 

 Ceylon, which is yellow, and of a penetrating odour, is furnished by Canarimn commMne, and the Javanese 

 Elemi by Sursera guminifera. The Mexican Elemi comes from Elaphrium elemiferum. The Balm of 

 Mecca or Gilead is a sweet smelling turpentine obtained by incision from two species of the genus Bal- 

 samodendron, natives of Arabia. Bdellium, a gum-resin of a sweet smell and bitter taste, used externally 

 medicinally, comes from B. africanum (Heudelotia africana). Guggur is furnished by B. Mukul, a tree 

 of the province of Scinde in India. The Kafal (-B. Kafal and B. Opohalsamum) produces gum and red 

 aromatic wood, which are the objects of considerable commerce in Arabia. Myrrh, a gum-resin, whose 

 use aa an aromatic and medicament goes back to the highest antiquity, is furnished by B. Myrrha, a 

 tree of Arabia and Abyssinia. [B. Roxburghii yields the Gogul balsam of Bengal.] Idea guianensis, 

 a Guiana tree, commonly called Incense- wood, yields a resin used similarly to Olibanum. I. altissima 

 gives the Carana gum, which talces the place of Balm of Gilead in America. The resin Ohibou or Ca- 

 chibou comes from the American Gum-tree (Bwsera gummifera), which grows from Guiana to Mexico. 

 [_Amyris halsamife^-a yields the Jamaica Lignum Rhodium. — Ed.] 



Hedioigia baJsamifera is a tree of the Antilles, yielding in abundance a resin called ' Baume a 

 cochon,' because the wild pigs, when wounded by hunters, pierce, it is said, the bark with their tusks, to 

 rub their wounds with the balsamic juice which exudes. [Tacamahac is the resin ot Elaphrium tomento- 

 sutii. Bursera altissima is a very lofty American tree, of whose aromatic wood canoes forty-two feet long 

 have been made. Many species of Cannrium are very lofty Indian forest-trees, abounding in resinous 



