1917] MACCAUGHEY—HAWAIIAN FLORA 413 
may cease at 6500 it., in others the lower forest may extend almost 
to sea level; the figures must all be interpreted with considerable 
latitude for local deviation. 
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Fic. 21.—Diagram showing altitudinal ranges of some representative plants of 
lava flow country; figures indicate feet above sea level. 
Upon classifying the lava flow species with reference to their 
altitudinal ranges (fig. 21), it is significant to note the great number 
of ranges and the fairly close adherence of each species to its range. 
Three general types of range may be cited: (1) wide-ranging 
species (Metrosideros polymorpha, Sophora chrysophylla, Myoporum 
