88 FIELD MUSEUM OF NATURAL HISTORY 
one of the extreme utilizations of flax as further represented 
in Cases 74 to 84 inclusive. 
The Smartweed Family (Polygonacece) . 
Case 90. — Note that Buckwheat (Fagopyrum esculentum), 
Rhubarb {Rheum rhaponticum) , and Dock {Rumex crispus), 
belong to this family association. Observe the kite made crudely 
of a single dry leaf of the Sea Grape {Coccolobis iivif era). 
The Wormseed Family {Chenopodiacece) . 
Case 90. — The Sugar Beet {Beta vulgaris), showing all the 
steps in the extraction of sugar from the Beet by 23 distinct 
specimens representing the result of each process. Of the sugar 
product of the world (13,957,269 tons) that from the Beet ex- 
ceeds that from Sugar Cane by over 500,000 tons. 
The Poppy Family {Papaveracece) . 
Case 91. — The poppy {Papaver somniferum) the principal 
economic plant of this family is represented by a number of 
specimens showing various interesting products of the plant; 
Opium, Morphine, Codeine, the capsules from which opium is 
extracted, the oil of the seed, etc. Note that the Bloodroot 
{Sanguinaria canadensis), formerly used as a red paint {Puc- 
coon) by the Indians; Celandine {Chelidonium majus) of the 
gardens, used in medicine; and the Dutchman’s Breeches {Di- 
centra canadensis) belong also to the Poppy family. 
The Mustard Family {Cruciferce) . 
Case 91. — Note, from the specimens of seed, how widely 
Mustard {Sinapis nigra) is cultivated in various parts of the 
world for the oil of the seed. Note also that the Cabbage {Bras- 
sica oleracea), the Turnip {Brassica napus), the Radish {Rapha- 
nus raphanistrum) , and the Horse Radish {Cochlearia armora- 
ica) are all members of this family of acrid plants. 
The Oak Family {Fagacece). 
Cases 92 and 93. — Various products of the Cork Oak {Quer- 
cus suber). Observe the bark, or cork peelings of successive 
periods, and the increase in density and thickness as a result. 
