LEGUMINOSM-MIMOSE&. 67 



between the juga ; usually 1 interfoliolar gland j stipules minute 

 caducous, or more rarely broad lanceolate persistent ; flowers in 

 globose umbels, or heads, or short or more rarely elongated and 

 loose spikes ; peduncles solitary or fascicled axillary, or more rarely 

 in racemes at extremities of branches (Tropical South America). 

 See p. 42. 



22. Calliandra Benth. — Flowers 5-, 6-merous, hermaphrodite or 

 polygamous (of Ingd) ; stamens much exserted. Legume linear, 

 straight or more rarely slightly falcate, piano-compressed with 

 thickened margins or more rarely subterete, 2-valved ; valves 

 bending back from apex to base by elasticity on dehiscence ; endo- 

 carp containing no pulp. — Small trees or shrubs ; leaves 2-pinnate ; 

 stipules usually persistent, membranous or spinescent, more rarely ; 

 umbellate or capitate inflorescence of Inga (Tropical and subtropi ci d 

 America, East Indies). — See p. 43. 



23. Lysiloma Benth. — Flowers 5-merous polygamous (of Calli- 

 andra ; stamens oc, rarely few (12-25), monadelphous at base. 

 Legume (of Acacia) linear, or more frequently broad, straight, or 

 falcate, piano-compressed submembranous, continuous within; valves 

 separating at maturity from entire persistent sutures. — Trees or 

 shrubs, unarmed ; leaves 2-pinnate ; flowers in globose heads or 

 cylindrical spikes ; peduncles axillary, solitary or fascicled, or more 

 rarely in short racemes (Tropical and subtropical America). See p. 43. 



24. Pithecolobium Mart. — Flowers hermaphrodite or poly- 

 gamous (of Inga or Calliandra). Legume flat or compressed, almost 

 straight, or more frequently falcate or twisted, coriaceous thick or 

 subcarnose, 2-valved or more rarely indehiscent, or separating into 

 1-seeded segments ; valves usually finally twisted (but not curling up 

 elastically). Seeds lodged in thin pulp. — Trees or shrubs, unarmed 

 or spinescent ; 2-pinnate leaves and inflorescence of Calliandra 

 (Tropical America, Asia, Africa, and Australia). See p. 44. 



25. Enterolotoium Mart. — Flowers of Pithecolobium. Legume 

 broad, circinate or curved reniform, compressed, thick, bard septate 

 between thick seeds, indehiscent. — Trees, unarmed; haves 2-pinnate 

 (of Pithecolobium); heads globose pedunculate axillary, solitary or 



i 2 



