138 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



merous, more rarely 1 to 3, without stipels. 

 (Aeschynomeninae.) 

 Stamen sheath split on the upper edge or 



entire. 

 Stamen sheath split on the under edge 

 and soon after florescence also more or 

 less on the upper edge. 

 Stamens all connate in a closed tube, the an- 

 thers alternately longer and fixed near the 

 base and shorter and versatile; flowers in 

 terminal or axillary spikes or heads, rarely 

 somewhat racemose; leaves pinnate, usu- 

 ally with few leaflets, not stipellate. (Sty- 



LOSANTHINAE.) 



Calyx with an elongated filiform tube; 

 leaves pinnate. 



Pod small, distinctly articulated, 

 hooked at the end, ripening in the 

 air; leaves pinnate with only 3 

 leaflets; flowers small, terminal or 

 axillary, in dense hispidulous 

 spikes. 

 Pod large, not articulated, not 

 hooked at the end, ripening in the 

 soil; leaves pinnate, usually with 

 4, seldom with 3 leaflets; flowers 

 rather large, solitary, axillary with 

 long pedicels. 

 Calyx tube not elongated; leaves digi- 

 tate, with 2 or 4 leaflets. 

 Stamens 10, monadelphous or diadelphous; pod 

 indehiscent; erect or scandent shrubs or trees, 

 with imparipinnate leaves and entire leaflets. 

 (Dalbergieae.) 



Pod membranous, papyraceous, or coriaceous 

 to ligneous, often compressed and winged, 

 in any case not drupaceous. 



Leaflets alternate, rarely reduced to 1. 

 (Pterocarpinae.) 



Anthers small, terminal, erect, the 

 cells dehiscing by a small apical 

 slit; pod suborbicular. 

 Anthers dorsifixed, opening longitu- 

 dinally. 



Calyx blunt at the base, brac- 

 teoles usually somewhat or- 

 bicular; standard silky out- 

 side; pod thickly coriaceous. 

 Calyx turbinate at the base; 

 bracteoles small, deciduous; 

 standard glabrous; pod pa- 

 pyraceous or thinly coria- 

 ceous, more or less inerassat ed 

 in the center. 



38. Pictetia (p. 180). 



39. Aeschynomene (p. 181). 



40. Stylosanthes (p. 183). 



41. Arachis (p. 184). 



42. Zornia (p. 185). 



45. Dalbergia (p. 192). 



46. Drepanocarpus (p. 193). 



47. Plerocarpus (p. 194). 



