BOTANY AND PLANT ECONOMICS lOY 
light green and brown by the roots of the British Plume Grass 
(Phragmifes communis). The various world-wide cereal food 
grains. Note also the old English confection Barley Sugar. 
The Palm Family (Palmecc) , 
(Cases 453 to 456 and 131 to 151.) 
Case 453. — Various basketry, hat and broom fibers extracted 
from leaves of palms. 
Case 454. — Utilization of the wood of palms, bows of the 
wood of the Sugar Palm (Arenga saccharifera) of the Solomon 
Islands. 
Case 455. — Palm hat and mat leaves. Note Cogollo, the prin- 
cipal hat palm of the west coast of South America (Oreodoxa 
regia). 
Case 456. — Palm rope fibers. Note the natural saddle pads 
made of the spathes of an unidentified Mexican palm, and 
paper stock from the Florida Saw Palmetto {Sahal serrulata). 
Case 457. — The oils and fruits of palms. Note the carved 
necklace beads (Acrocomia sclerocarpa) from Porto Rico. Drag- 
on’s Blood, a medicine and dye resin obtained from the Malagan 
Deamon Palm (Daemonerops draco) ; and household utensils 
fashioned from the shells of the Coconut {Cocos nucifera). 
The Walnut Family (Juglandacece) . 
(See also Case 166.) 
Case 458. — Note the woods, fruits and dye yielded by this 
family, especially the pure white wood Sawaguruma (Pterocarya 
rhoifolia) of Japan. 
The Birch Family (Betulacece). 
(See also Case 165.) 
Case 458. — Observe the model of a magnified portion of the 
catkins of the male and female White Birch (Betula alba) 
showing the characteristic grouping of the functional structures. 
Note the peculiar flakes of bark of the Paper Birch {Betula papy- 
rifera), and yarns dyed with the bark of the European Alder 
{Alnus glutinosa). 
The Oak Family {Fagacece) . 
(See also Cases 92, 93, 167, 168.) 
Case 459. — Note that the Chestnut {Castanea americana) and 
