BOTANIC MATERIA MEDICA, 217 
FLORES ET PETALA—FLOWERS AND 
PETALS. 
The flowers and petals usually form the showy 
portion of the tree or plant, but there are many 
exceptions to the rule, as for example, the dog- 
wood blossom, Flowers occur in racemes, co- 
rymbs, umbels, panicles, spikes, spadices, cat- 
kins, etc. They are cruciform, labiate, campan- 
ulate and tubular in form. 
The portions of the flower used in medicine 
are the floral envelope and all the organs of re- 
production, such as stamens, pistils, ovules and 
often many well matured seeds. . 
Aurantii Flores, Orange flowers, from the 
trees of the Citrus Aurantium and the Citrus 
Vulgaris.—Natural order Aurantacee. Native 
of northern India and cultivated in many of the 
sub-tropical countries of the world. The orange 
has already been described under another head, 
hence we will only call attention to the flowers; 
these are white, very fragrant, with united fila- 
ments in three sets, with ten or more stamens. 
The calyx is saucer-shaped and five cleft. The 
unexpanded flower is the part used in obtaining 
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