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173 STATISTICS, ETC., OF HAWAIIAN PLANTS,
100 to 15. These 554 flowering plants are divided among 353
genera, giving to each genus on an average 3'58 species. There are
87 Natural Orders of flowering plants represented in the group. Of
the 554 flowering plants 377 are peculiar to the group, while 43 are
of recent and 27 of supposed aboriginal introduction, giving the pro-
portion of endemic species 6 8' 05, of introduced (recent) species,
12-46.
Of the 253 genera 39 are peculiar, and these 39 genera are repre-
sented by 151 species, or 8'94 species to a genus, while the whole flora
has but 2"58 species to each genus; thus showing the important part
which these genera take in constituting the whole pha^nogamous flora.
Among the genera not peculiar to the islands, there are sixteen, of
which the species belong to a distinct group in the genus, or which
are most largely represented in the South Pacific Islands and Australia,
or on the Hawaiian Islands themselves.
Geranium, very peculiar species.
Melicope, either to be reduced to
Pelea, or if not, entirely Austra-
lasian.
Pittosporum, largely Australasian.
Coprosma, a marked New Zealand
type.
Acacia, an Australian phyllodinous
species.
Oouldia, one other species in Pacific.
Yittadinia, New Zealand and Aus-
tralia.
Lipochceia, mostly Hawaiian, a few
in Mexico.
Sccevola, mostly in South Seas and
Australasia.
Lobelia, species very peculiar.
Cyrtandra, represented in the South
Seas and Moluccas : large geuus in
the Hawaiian Islands.
Cyathodes, Australasian.
Wikstrosmia, many species Hawaiian,
represented in South Seas and Aus-
tralasia.
SantaJum, Western Pacific.
Sxocarpns, Avistralasia and Mol uccas.
Astelia, „ „
These sixteen genera comprise 76 species, or 4' 7 5 to a genus, thus
taking an important place in the flora.
All the species of the following families are peculiar to the group,
omitting, of course, species known to be introduced.
Eanunculacea;.
—Menispcrmacese.
Cruciferaj.
Violaccffi.
—Bixacea?.
Pittosporaceoe.
Caryophyllacea;.
Portulacacere.
— Camelliacete.
—Tiliacese.
Geraniace£e.
EutaccfB.
—Aquifoliacea;.
—Celastracese.