LEGUMINOSH. (PEA FAMILY.) 385 
Fig. A. On the left is Hosackia sub- 
pinnata, showing a full grown pod 
and a flower as seen from above. On 
the right is a pod and flowers o1 
Hosackia Purshiana. At a isasingle 
flower with its bract as seen from the 
front. The lower leaves and bracts 
are larger. 
: Fig. B. A head of frifolium fuca- 
A tum, with all but three of the flowers 
removed, showing the common receptacle and the involucre. 
Fig. C. An axillary spike of Astragalus didymocarpus, with ripe fruit. Below is 
one of the pods magnified. 
This order is remarkable for the number of useful and beautiful plants 
which belong to it. Pease, beans, lentils, peanuts, clover, alfalfa, etc., 
furnish food for man and domestic animals. Tropical plants of this 
order supply, among others, the following articles of commerce: Gum 
arabic, gum senegal, gum ‘copal, dragon’s-blood, indigo, logwood, brazil- 
wood, rosewood, tamarind. Many species have medical value, as senna, 
catchu, copaiba, etc. 
There are over 6,000 species of leguminous plants, mostly tropical. 
About 350 species are natives of the United States, more than half of 
:' which are found in California. Only 4 or 5 species are common to this 
‘eoast and the Atlantic States, and these have forms peculiar to each 
coast. Our 180 species are grouped under 14 genera, while the 150 species 
of the East (i. ¢., the Mississippi States and eastward to the Atlantic), 
represent 50 genera. There are about 40 species of lupine, and the same 
number belonging to the genus Astragalus, growing within the limits ot 
this State. Only two kinds of the former and 4 of the latter grow east 
of the Mississippi. The latter is the largest American genus of the 
