22 
PACIFIC SCIENCE, Vol. XV, January 1961 
10. Hibiscus Newhousei sp. nov. 
Fig. 15 
DESCRIPTION: Arbor 6 meters aita. Stipulis 
4-6 mm. longis. Petiolo 0.3-1. 8 cm. longo 
piloso. Lamina 4. 5-9-0 cm. longa 2. 5-4.0 cm. 
lata. Pedunculo 0.7-0.9 cm. longo articulato 2 
mm. infra involucrum; bracteis lanceolatis 7- 
8 mm. longis. Calyce 1. 8-2.0 cm. longo 1.0- 1.4 
cm. lato, furcato 0. 3-0.7 cm. cum lobis acutis, 
10-nervoso piloso. Petalis 5. 0-5. 2 cm. longis 
1.3-1. 6 cm. latis, rubro colorato. Columna stam- 
inarum 3-0-3 .8 cm. apicibus filamentium liberis 
ca. 4 mm. 
Tree 6 m. tall. Stipules 4.0-6.0 mm. long. 
Petiole 0.3-1. 8 cm. long, pilose. Leaves 4.5-9.0 
cm. long, 2. 5-4.0 cm. wide; margin irregular, 
apex distinctly acuminate. Peduncle 0.7-0.9 cm. 
long, articulate 2 mm. below the involucre. 
Lanceolate bracts 6-8, 7-8 mm. long. Calyx 
tubular 1. 8-2.0 cm. long, 1.0- 1.4 cm. wide, 
cleft for .3-7 cm., lobes acute, pilose, 10- 
nerved. Petals 5. 0-5. 2 cm. long, 1.3-1. 6 cm. 
wide, dark red, puberulent on outer surface. 
Staminal column 3. 0-3. 8 cm. long, slender, gla- 
brous, apex 5-lobed. Free filament tips extend 
ca. 4 mm. from column, located on the upper 
half of the column. 
HOLOTYPE: Moloaa Forest Reserve, Kauai; 
ca. 500 feet altitude. November 10, 1958. I. E. 
Lane 44 . 
Fig. 15. Solid circles, Hibiscus ivaimeae; solid tri- 
angles, Hibiscus Newhousei. 
This group is the most recent of the indig- 
enous hibiscus to be discovered. It had been re- 
ported several years ago and rediscovered in 
1957. Mr. and Mrs. Jan Newhouse found it 
growing along the Moloaa Stream in the Mo- 
loaa Forest Reserve, northeastern section of 
Kauai. They brought it to cultivation at that 
time. A year later Irwin Lane made a second 
collection in its original habitat. Lane sent cut- 
tings to the Foster Gardens in Honolulu, where 
this species can now be found. 
One of its notable characters is its distinctly 
acuminate leaves. H. Newhousei shows closest 
proximity to the native H. Kokio , from which 
it differs by leaf shape and size, shorter pedun- 
cles, shorter bracts, smaller calyx, shallower 
clefts, shorter column, and other characters. 
Flowers are dark red and leaves are deep green 
on both surfaces. 
11. Hibiscus immaculatus sp. nov. 
Figs. 16-18 
DESCRIPTION: Arbor 3 meters alta basi 6 cm. 
in diametro. Petiolo 1.0-1. 5. Lamina 5-7 cm. 
longa 4-6.5 cm. lata ovati-obovata margine den- 
tate, nervis baud palmatis viride lactucae nervo 
medio subter pubescente stellato. Pedunculo 2- 
3 cm. longo 2-3 mm. lato articulato 1 cm. infra 
involucrum; bracteis lanceolatis 5-8 mm. longis. 
Calyce 2. 5-3.0 cm. longo, 0.8-1. 0 cm. lato, fur- 
cato 4 mm., cum lobis acutis, 10-nervoso piloso 
flavi-virente. Petalis 8-11 cm. longis 2. 5-3. 5 
cm. latis glabris albis. Columna staminarum 10- 
14 cm. paulo papillosa apicibus filamentium 
liberis 10-20 mm. longis. Ramuli stylorum 1.5- 
2.0 mm. longi erecti papillosi. Ovario 1.0 cm. 
longo 7-8 mm. lato. 
Tree 3 m. tall, diameter at base 6 cm. Petiole 
1.0-1. 5 cm. Leaves 5-7 cm. long, 4-6.5 cm. 
wide, ovate-obovate, margin denticulate, veins 
scarcely palmate, "lettuce green,” midrib bears 
slight stellate puberulence on underside. Pedun- 
cle 2-3 cm. long, 2-3 mm. wide, articulate 1 
cm. below involucre. Lanceolate bracts 6, 5-8 
mm. long. Calyx 2. 5-3.0 cm. long, 0. 8-1.0 cm. 
wide, cleft for 4 mm., lobes acute, 10-nerved, 
pilose, "dull green yellow.” Petals 8-11 cm. long, 
2. 5-3. 5 cm. wide, glabrous, white. Staminal col- 
umn 10-14 cm. slightly papillate. Free filament 
