1917] MaACCAUGHEY—HAWAIIAN FLORA 107 
species. Two of the three genera (Pelea and Platydesma) are 
endemic; the third (Zanthoxylum) is world wide in its range. 
Pelea, named in honor of the Hawaiian volcano goddess Pele, is a 
large genus, with nearly 30 recognized species and an even larger 
number of varieties. Like the species of Cyrtandra and the lobeli- 
aceous genera, the species of Pelea are highly variable, with many 
intergrading forms, so that as yet the species are poorly defined. 
Platydesma is an isolated genus, with 4 woody species. Zan- 
thoxylum has 7 species, 6 arborescent, and many varieties. The 
majority of these are characteristic of arid leeward regions and old. 
lava flows. There are no native citrus fruits, although the orange 
has become naturalized in many districts, particularly in the Kona 
district, on Hawaii. | 
Violaceae 
The endemic Violaceae are a distinct surprise to the mainland 
botanist on his first excursions in our Hawaiian forests. Instead 
of tender little herbs, he finds stout woody shrubs, ranging in 
height from 3 to 6 ft. The flowers are quite like those of the 
familiar eastern violets, and are white, pink, purple, or blue in — 
color, according to species. There : are a or 8 species, ranging in 
swamps, they cover r et ns der- 
have ca aber : 
= possibilities in the way of ceatvated v violet bushes. ne 
and : 
suggest novel horti- 
