Il6. SIMARUBACEAE — II7. BUKSEKACEAE 3OI 



Stigma entire. Disc cushion-shaped. Antliers ovate. Flowers in pan- 

 icles. [Tribe IRVINGlEAE.l 14 



14. Ovary 4 — 5-celled. Fruit broader than long, angled, 4 — 5-celled, with 



a thin fleshy layer. — Species 3. Equatorial West Africa. 



Klainedoxa Pierre 

 Ovary 2-celled. Fruit oblong, i — 2-celled 15 



15. Fruit much compressed, broadly winged nil round, 2-celled, 2-seeded, 



with a thin fleshy layer. — Species 2. Equatorial West Africa. (Under 



Irvingia Hook, fil.) Desbordesia Pierre 



Fruit slightly compressed, not winged, i-celled, i-seeded, with a thick 

 fleshy layer. — Species 5. Central Africa. They jneld timber, edible 

 fruits, and oily seeds (dika). (Including Irvingella van Tiegh.) (Plate 

 74.) Irvingia Hook. fil. 



FAMILY 117. BURSERACEAE 



Trees, rarely shrubs. Bark resinous. Leaves usually pinnate. Flowers 

 panicled, regular, mostly polygamous. Perianth consisting of a caty.x and a 

 corolla of 3 — 5 free petals. Stamens twice as many as the petals, inserted 

 on the margin or the outside of the disc, rarely within. Anthers versatile, 

 opening inwards by longitudinal slits. Ovary 2 — 5-celled. Ovules 2 in each 

 cell, pendulous or attached laterally. Style simple or wanting ; stigma lobed. 

 Fruit drupe-like, but sometimes dehiscent. Seeds exalbuminous. Embryo 

 with a superior radicle and usually folded or twisted cotyledons. — Genera 7, 

 species 160. Tropical and South Africa. (Under TEREBINTHACEAE). 

 (Plate 75.) 



1. Receptacle concave; tube-, cup-, or urn-shaped; sepals, petals, and stamens 



inserted at its upper rim. Sepals 4 and petals 4, valvate in bud. Ovary 

 2 — 3-celled. Fruit drupaceous, but dehiscent, with a 2 — 3-celled 

 stone ; one cell only fertile. — Species no. Tropical and South Africa. 

 Several species yield timber and odorous resins (especiall}^ myrrh) 

 which are used for preparing varnish, incense, and medicines. Some are 

 also used as hedge plants. {Balsamea Gled., Balsamodendron Kunth. 

 including Hemprichia Ehrenb. and Hiizeria Klotzsch). Commiphora Jacq. 

 Receptacle flat or convex, usually bearing a free disc, outside of which 

 the sepals and petals are inserted. Leaves pinnate. Trees. ... 2 



2. Flowers 3-merous. Petals valvate in bud. Fruit with a 2 — 3-celIed 



stone, indehiscent, sometimes only one cell fertile 3 



Flowers 4 — 5-merous. Fruit with 2 — 5 stones 5 



3. Fruit depressed, obliquely hemispherical, broader than long, with a lateral 



style and i — 2 fertile cells ; endocarp thin, mesocarp rather thick. 

 Embryo with a short radicle and thick, pinnately divided cotyledons. 

 Stamens inserted outside the thick disc. Ovar}- 3-celled ; one cell 

 sterile. — Species 6. Equatorial West Africa. They yield timber, 



