THE DICOTYLEDONS 539 
There are three natural subdivisions of the Leguminosae: (1) 
The Mimosacee or Mimosa alliance is characterized by possessing 
regular flowers, often in capitula, the petals of which do not 
overlap or are they overlapped, and by often furnishing mucilage. 
To this group belong the plants yielding Acacia and Catechu. 
(2) The Cesalpinacee which have slightly irregular flowers, the 
petals of which are imbricate in aestivation, the odd posterior 
petal in the flower being overlapped by the 2 side petals. To this 
group belong the plants yielding Copaiba, Heematoxylon, Senna, 
Cassia Fistula, Brazil Wood, Peach Wood, Sappan and Tam- 
arindus. (3) The Papilionacee which have very irregular flowers, 
the petals of which are imbricate in aestivation, but the odd petal 
here called the standard, overlaps the 2 side petals and the two 
side petals overlap the keel petals. To this group belong the 
plants yielding Tolu, Balsamum Peruvianum, Baptisia, Glycyr- 
rhiza, Goa Powder, Foenugreek, Galega, Melilotus, Trifolium, 
Tragacantha, Tonka, Santalum Rubrum, Scoparius, Physo- 
stigma, etc. _ } 
OrrFiciAL Druc PART UsepD BoTANICAL ORIGIN HABITAT 
Acacia Gummy exudation Acacia Senegal and Africa 
some other African 
species of Acacia 
Cascara Bark Sweetia S. Mexico to 
Amarga panamensis Panama 
Tragacantha Gummy exudation Astragalus gummifer Asia 
and other Asiatic 
species 
Balsamum Balsam Toluifera Pereirze Central America 
Peruvianum (Myroxylon Pereirz) 
Balsamum Balsam Toluifera Northern South 
Tolutanum Balsamum America 
Stantalum Heartwood Pterocarpus Indo-China and 
Rubrum santalinus S. India 
Glycyrrhiza glabra 
var. typica 
Glycyrrhiza glabra S. Europe, W. and 
Glycyrrhiza Rhizome and var. glandulifera C. Asia 
roots and other var’s. of 
G. glabra yielding 
a yellow and sweet wood 
Cassia Senna pane te 
Senna Leaflets Soudan 
Cassia angustifolia 
Arabia and Africa 
