Trees, Shrubs and Vines 
These general facts of plant-structure, with the added glossary, 
suffice to explain all of the more technical terms used in the fol- 
lowing descriptions. In the case of white-blossoming shrubs, it 
must be noted, first of all, whether the petals are distinct, or 
somewhat cohering by their edges (i.e., whether the flower is 
polypetalous or monopetalous), as the first two groups are based 
upon this difference : p. means polypetalous ; m. means mono- 
petalous. 
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