Bulletin - United States National Museum - Smithsonian Institution

FLOKA OF WASHINGTON AND VICINITY. 39
This table exhibits better perhai)s than any other the special charac-
teristics of the flora. The normal percentage being about 31, we see
that in all but live of these sixteen largest orders our flora is in excess of
that standard, while it is richest proportionally in the Cnpuliferce^ Rosa-
cea}, and Cruciferce, and poorest in the Filices and Leguminosw.
Comparison of large genera.
In like manner we may compare the 15 large genera given in a pre-
ceding table (p. 35)
M
:
Genera.
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