116 FIELD MUSEUM OF NATURAL HISTORY 
producing highly aromatic essential oils; Asafoetida, the con- 
crete exudation of the roots of the Persian Ferula assafoetida, 
and Gum Ammoniacum that flows from insect punctures in the 
flowering stem of the Oriental Dorema ammoniacum, a tall pars- 
ley-like plant 
The Dogwood Family (Cornacece), 
Case 491. — ^A type of this family is the Flowering Dogwood 
(Cornus florida) the dense wood of which is known as Ameri- 
can Boxwood from its utilization for printers’ woodcuts. Note 
the Ogechee Limes or Tupelo Gum Fruits (Nyssa aquatica) 
eaten as a preserve in the Southern States. 
The Wintergreen Family {Ericacece). 
Case 491.— A family of more or less aromatic plants, several 
of which find use in domestic medicine. Note the yarn dyed by 
the English Heather {Calluna vulgaris), and the density of the 
wood in this family as shown in the cross section of the Japa- 
nese Yashio t’sut’suji {Mensiesia purpurea). 
The Myrsine Family (Myrsinacece), 
Case 491. — A small family of tropic trees yielding little of eco- 
nomic importance except their lumber. Note the density and 
beauty of the wood as evident in the specimens of Lancewood 
{Myrsine Grisehachii) and Canelon {M, floribunda). 
The Sty rax Family {Styracacece) , 
Case 491. — A small family of woody plants, several of which 
yield odorous incense gums. Note Sumatra Benzoin exuded by 
a small tree of Sumatra {Styrax subdenticulata) , and Gum Ben- 
jamin, a similar resin exuded by the Malayan 5'. Benzoin, 
The Sapodilla Family (Sapofacece), 
Case 492. — A small family of chiefly tropic and subtropic trees 
and shrubs having a milky juice, many of which yield delicious, 
edible fruits. Note the Star Apples (Chrysophyllum cainito), the 
Chinese Litchi {Nephelium litchi), and Formosan Longan {N. 
longan), the Mexican Mamme {Lucuma mammosa) and espe- 
cially the Central American Sapote (Achras sapota) the con- 
gealed milk (chicle) of which forms the basis of most of the 
chewing gums. 
