KEY TO THE FAMILIES 41 



5.' Leaves palmately 3- to 7-foliolate. 

 6. Herbs; fruit a dehiscent capsule. 



7. Leaves 3-foliolate, the leaflets retuse; juice acid. 



66. OUalidaceae (p. 264) 

 (Oxalis) 

 7. Leaves usually 6-foliolate; erect, branched, often rank- 

 scented herbs 59. Capparidaceae (p. 214) 



6. Shrubs or small trees. 



7. Leaves glandular-punctate, 3-foliolate; spiny shrubs or 

 small trees with small to large, few- to many-seeded 



fleshy fruits 69. Rutaceae (p. 268) 



7. Leaflets not glandular-punctate, 5- to 7-foliolate; unarmed 

 shrubs with small drupaceous fruits. 



79. Sapindaceae (p. 303) 

 (Allophylus) 

 5. Leaves simply pinnate. 



6. Prostrate herbs with solitary, pedicelled, axillary flowers, the 



fruit of spinous cocci 68. Zygophyllaceae (p. 267) 



6. Erect herbs with sensitive leaves crowded at the ends of the 



stems; fruit a capsule 66. OxaUdaceae (p. 264) 



(BiQphytum) 

 6. Erect shrubs or trees. 



7. Leaves glandular-punctate 69. Rutaceae (p. 268) 



7. Leaves not glandular-punctate. 



8. Anthers bor-ne inside or at the apex of a tube formed of 



the wholly united fllaments 72. Metiaceae (p. 273) 



8. Stamens free, or the fllaments united at the base only. 

 9. Sepals usually imbricate in bud. 

 10. Sepals free or nearly so. 



11. Flowers regular; ovary 5-celled; ovules pendulous ; 

 fruit fleshy, acid, indehiscent. 



66. OxaUdaceae (p. 264) 



(Averrhoa) 



11. Flowers often irregular; ovary 1- to 4-celled; 



ovules erect; fruit dry or fleshy, dehiscent or 



indehiscent 79. Sapindaceae (p. 303) 



10. Sepals united at the base. 



11. Ovules and seeds pendulous; plants with bitter 



bark 70. Simarubaceae (p. 272) 



11. Ovules and seeds erect. 



76. Anacardiaceae (p. 298) 

 ' (Spondias) 

 9. Sepals valvate in bud; trees with resinous sap. 



71. Bureeraceae (p. 273) 

 (l) Ovary inferior. 



2. Stamens numerous, several to many times as many as the petals. 



3. Aquatic herbs from submerged rootstocks, with large flowers, and 

 rounded, usually floating leaves; styles and stigmas united into a 



radiate disk 49. Nymphaeaceae (p. 201) 



3. Fleshy, green, leafless, usually spiny, terrestrial plants, with jointed 



stems 96. Cactaceae (p. 338) 



3. Succulent terrestrial herbs with broad, inequilateral leaves; flowers 

 unisexual; fruit a winged capsule 95. Begoniaceae (p. 338) 



