98 RUTACEAE. 



Flowers in short, axillary spikes : sepals, and petals, 4 : seeds usually less than 3 mm. 



wide. 1. Z. Fagara. 



Flowers in terminal corymb-like panicles or cymes : sepals, 

 and petals. 3 or o : seeds over 3 mm. wide. 

 Sepals, and petals, 3 : leaf-blades equally pinnate. 2. Z. coriaceum. 



Sepals, and petals, 5 : leaf-blades unequally pinnate. 3. Z. Clava-Herculis. 



1. Z. Fagara (L.) Sarg. Shrub, or tree sometimes 10 m. tall, the trunk 

 slender, often reclining: leaves 2.5-11 cm. long, the rachis winged; blades of 

 the lateral leaflets mostly obovate to oval, 1-2.5 cm. long, shallowly crenate: 

 petals 1.5-2 mm. long, or larger: mature carpels subglobose, 3.5-4 mm. long: 

 seeds 2-2.5 mm. wide. — Hammocks — F. K. {Bah., Cuba, Ant.) — Wild-lime. 



2. Z. coriaceum A. Eich. Shrub, or tree becoming 7 m. tall: leaves 6-15 cm. 

 long; blades of the leaflets leathery, rigid, obovate to cuneate or oblong with 

 acuminate base, 2-6 cm. long; petals 2-3 mm. long; mature carpels 5-6 mm. 

 long; seeds about 3.5 mm. wide. — Hammocks. — F. K. (Bah., Cuia, Ajit.) — 

 Hercules '-CLUB. 



3. Z. Clava-Herculis L. Shrub, or tree sometimes 17 m. tall, the prickles 

 raised on corky bases: leaves 1-3 dm. long; blades of the lateral leaflets ovate, 

 4-5 cm. long, appressed-serrate: petals 3-3.5 mm. long: mature carpels mostly 

 2-5 together, 4-6 mm. long: seeds 4-5 mm. wide. — Hammocks. — Prickly-ash. 

 Toothache-tree. 



2. AMYRIS [P. Br.] L. Shrubs or trees. Leaf -blades pinnate, often 

 1-foliolate, the petiole wingless. Flowers perfect or polygamous, paniculate. 

 Sepals 4 or 5. Petals 4 or 5, very small. Ovary 1-eelled. Drupe with a single 

 seed. 



Drupe globose or nearly so: ovary glabrous: inflorescence-branches glabrous or 

 puberulent. " 1- A. elemifcra. 



Drupe of an obovoid type ; ovary pubescent : inflorescence- 

 branches hispidulous. 2. A. balsamifera. 



1. A. elemifera L. Shrub, or tree becoming 17 m. tall; leaflets 3 or 5; blades 

 ovate to rhombic-ovate, 2-8 cm. long: petals 2.5-3.5 mm. long: drupes 4-8 mm. 

 long, black beneath the bloom. — Hammocks. — F. K. (Bah., Cuba, Ant.) — 



TORCHTVOOD. 



2. A. balsamifera L. Shrub, or small tree sometimes 10 m. tall; leaflets 3-5; 

 blades ovate, sometimes narrowly so, to rhombic-ovate, 5-13 cm. long, dull 

 beneath: drupes obovoid-oblong to obovoid, 6-14 mm. long. — Hammocks. — 

 (Cuba, Ant.) 



3. CITRUS L. Shrubs or trees. Leaf -blades 1-foliolate, the petiole often 



winged. Flowers perfect, axillary. Sepals united. Petals 5, or 4-8, mostly 



wax-like. Ovary several-celled. Berry several-seeded. The following species, 



apparently natives of Asia, are widely cultivated, and naturalized. 



Berrv of a globose or spheroidal type, not mamillate at the apex. 



Wings of the petioles usually broad : pulp of the berry bitter and sour. 



1. C. viilgaHs. 

 Wings of the petioles usually narrow : pulp of the berry sweet 



or sour. 2. C. Atirantiutn. 



Berry of an elongate type, commonly mamillate at the apex. 



Berry relatively small, with a relatively thin rind : the pulp 

 " well developed, with abundant .iuice. and very acid. 

 Corolla 2-2.5 cm. wide : leaflets with a rounded apex. 3. C. Lima. 



Corolla 3-5 em. wide: leaflets with an acute apex. 4. C. Limnnum. 



Berry relatively large, with a thick rind, the pulp only slightly 



developed, with little juice, and not very acid. 5. C. Uledica. 



1. C. vulgaris Risso. Small tree with sharp thorns: leaflets ovate to oblong, 

 6-12 cm. long, often acuminate, the petioles usually broadly winged: flowers in 

 small cymes; sepals often obtusish; berries dark-orange or reddish, the rind 



