Malvaceae. 
shorter, ie the short filaments seetihia: near the five-toothed apex; style Mis araingee 8 to 10 
mm, spreading horizontally, ciliate; capsule glabrous, 18 mm; seeds m, reniform 
ov ered with a coarse brownish pubescence. 
This species is somewhat rare, at least not so common as the white native Hi- 
biseus. The writer met with two varieties on Molokai— one at Mapulehu, where 
it is a shrub at about 1000 feet elevation; the other at the bottom of Wailau 
Valley, only a few hundred feet above sea level. On Kauai only, it is apparently 
a tree. Mr. Lydgate informed the writer that he saw a tree about 40 feet in 
height back of Lihue, along the pole-line. As the writer did not see specimens, 
it is doubtful whether it is H. Kokio or Forbes’ H. Kahilii, a tree 27 feet high, 
which, however, seems not to differ very much from the former, according to 
Forbes, only in the pubescent calyx and in other minor points, one of w hich, 
according to his figure, seems to be the bluntly acute or somewhat obtuse apices 
of the leaves. His specimen came from near the Wahiawa swamp, Kauai. H. 
Kahilit Forbes Oce. Pap. B. P. B. Mus. V. (1912) 4, with plate. 
HIBISCADELPHUS Rock. 
Bracteoles 5 to 7, very narrow linear or dentate, free. Calyx aneply a unevenly 
2 to 3 cleft. Staminal et fos subhariferous below the 5-dentate ap Ovary 5-celled, 
with 1 to 3 ovules in each cell; style branches 5, suberect with eats te ‘flesh: colored stig- 
mas. Capsule woody or oriaceous, 5 valved; endocarp chartaceous, deta Seeds 
reniform, covered with a ee rty white tomentom, —Me dia um sized trees with a a stellate 
intel Leaves cordate, unevenly 3 to Aco nted or rounded and e Flow 
ingle or several in the axils of the leaves ends of the ene ‘color of getale 
aagern, Yellowish and green. Calyx bP: ar ies maturation of the fru 
The genus Hibiscadelphus established by the writer consists of 3 species which 
are peculiar to the dry sections of Hawaii and Maui. Of two of the species 
only an individual tree is in existence, while of the third several can still be 
found on the slopes of Mt. Hualalai, in the forest of Waihau, in North Kona, 
Hawaii. 
The genus, of which H. ibiscadelphus Giffardianus is the type, is closely re- 
lated to Hibiscus, from which it differs mainly in the deciduous calyx, and quite 
different flowers. 
KEY TO THE SPECIES. 
Flowers 5 to 6 em lon 
Involueral bakes Boe filiform: ‘freee se oe ee ek H. Giffardian 
Tnvolueral tenig ropes putin ONO NOVO eee pees ee teed 
Flowers 2.5 to 3 em lon ng. 
Involueral ii dentitorm i mimo ec ee oe ee re 
Hibiscadelphus Giffardianus Rock. 
Hau kuahiwi. 
(Plate 117.) 
ee GIFFARDIANUS Rock in Bull. Hawaii Bd. of Agric. and Forestry I. 
(1911) 1 0. pl. 4. 
labrous, eovere 
medium sized tree; bark smooth, fibrous, whitish; branches oe g 
with ger aa Pipex on lon petioles orbicular in outline cordate, bluntly gente at Pt 
apex, 12-15 ¢ ach way, unevenly lobed or pointed, chartacecus, se ered on bot 
: 297 
