304 



XXXIII. RUTACE.E (OLIVER). [Buta. 



opening at the apex. Seeds albuminous.— Herbs, often shrubby below, 

 glandular-punctate. Leaves alternate, often pinnati- or 2-pinnatisect. 

 Flowers in terminal corymbose cymes. 



A considerable genus of the Mediterranean region, Atlantic Islands, and Western Asia. 

 Flowers usually 4-merous. Petals fimbriate. Leaves divided . . . I. R. graveolens. 

 Flowers usually 5-merous. Petals entire. Leaves undivided (Haplo- 



phytum) 2 - R - tuberculata. 



1. R. graveolens, Linn.; DG. Prod. i. 710, var. bracteosa. Leaves 

 2-pinnatipartite ; segments oval- or oblanceolate-oblong, obtuse. Bracts 

 sessile, ovate or cordate-based, amplexicaul. Petals fimbriate. Filaments 

 glabrous. 



Nile Land. Abyssinia, Dillon and Petit ! 



Perhaps only cultivated. Mediterranean region, Syria, etc. 



2. R. tuberculata, Forsk. ; DC. Prod. i. 711. More or less pro- 

 minently gland-tubercled. Leaves undivided, linear, oblanceolate to obovate- 

 cuneate. Petals entire. Filaments pilose. — Haplophytum, A. de Juss. in 

 Mem. Mus. xii. 528. t. 17. f. 10. 



Nile Laud. Nubia, Schweinfurth ! Ehrenberg ; White Nile, Cienkowski. 

 North Africa eastward to Scinde. 



2. ZANTHOXYLUM, Linn. ; Benth. et Hook. f. Gen. PL i. 297. 



Flowers polygamous (or dioecious?). Calyx 4-5-fid or -partite; segments 

 imbricate. Petals 4-5, free, imbricate or valvate. Male fi. : Stamens as 

 many as and alternate with the petals, hypogynous. Ovary rudimentary. 

 Female fl. : Stamens or scale-like. Carpels 1-5, oblique, each 1-celled, 

 usually biovulate. Fruit of 1-5 cocci, dry or drupaceous, usually opening 

 in 2 valves, 1 -seeded. Seeds with a crustaceous or bony testa and straight 

 or curved embryo in the axis of a fleshy albumen. — Shrubs or trees, glabrous 

 or pubescent, with or without prickles. Leaves alternate, imparipinnate, 3- 

 or 1-foliolate ; leaflets articulate, entire or crenulate, glandular-dotted. 

 Flowers small, white or greenish, in terminal and axillary panicles. Fruit, 

 often the entire plant, aromatic or pungent. 



A considerable tropical genus. The following species appear to be endemic. 



Flowers sessile, 5-merous. Leaves multifoliolate, 2-3 ft. ; leaflets 



5-8 in. long \ & macrophyllum. 



Flowers sessile. Leaves 5-9-foIiolate ; leaflets obovate-oblong, ob- 

 tuse or broadly apiculate 2. Z. senegalense. 



Flowers equalling the pedicels. Leaves 5-9-foliolate ; leaflets' el- 

 liptical, acuminate, 4-5 in. by 2£ in 3. Z. melanacanthutn. 



Flowers equalling the pedicels, usually 4-merous. Leaves multi- 

 foliolate ; leaflets oval, acuminate, 2-3 in. by 1-1$ in. . . . 4. Z. rubescens. 



Flowers 5-merous. Leaves 13-15-foliolate, rachis 5-8 in. ; leaflets 

 ovate-lanceolate, 1-2 in. by $-£ in 5. Z. Leprieurii. 



1. Z. ? naacrophyllum, Oliv. A glabrous tree of 30 40 ft. Prickles 



