Hawaiian Hibiscus— Roe 
9 
FlG. 3- Distribution of Hibiscus Y oungianus. Solid circles indicate localities for which exact data are avail- 
able; open circles represent localities where species have been reported but plants are unavailable. 
2. Hibiscus Brackenridgei Asa Gray 
Figs. 4, 5 
Hibiscus Brackenridgei Asa Gray. Bot. U, S. 
Expl. Exped, p. 175. 1838. 
DESCRIPTION: Shrubby plant, glabrous, leafy. 
Leaves rounded in outline and subcordate, diam- 
eter 5-10 cm., 5-7 lobes separated by acute and 
narrow sinuses, coarsely toothed, terminal lobe 
prolonged. Stipules setaceous, caducous. Flowers 
axillary; peduncle 5 mm. long, puberulent and 
sparingly hispid; bracts 8, rigid, setaceous- 
subulate, glabrous, nonglanduliferous. Calyx his- 
pid, cleft to below the middle, lanceolate lobes 
each bearing dorsal gland on midrib near the 
base. Corolla yellow, green when dry. Petals 
4- 5 cm. long, externally stellate, pubescent. 
Staminal column antheriferous throughout, apex 
5- toothed. Style branches hirsute; stigmas de- 
pressed-capitate. Ovary densely villous-hispid. 
Capsule 2 cm. long, ovoid, closely invested by 
calyx, silky-hispid. Seeds angled, minutely to- 
mentose. 
hoi, on: PE: From West Division of Maui, in 
Gray Herbarium. (In the Bishop Museum Her- 
barium are preserved a leaf and fruit of mate- 
rial used by Gray.) 
SPECIMENS EXAMINED: Lanai : Maunalei, 
March 1918, G, C. Munro 638 . Awalua, January 
1919, Munro . Kanepuu, June 15, 1927, Munro . 
Kaena, April 1921, Munro. Puhiehelu, May, 
1921, Munro . 
Maui : Pohakea Gulch, West Maui, on a very 
arid slope, June 11, 1927, Degener and Wiebke 
3634 , 3633 . Brown Hill, Kula, Hillebrand and 
Lydgate. 
H. Brackenridgei , in at least one of its forms, 
has been reported and collected on the islands 
of Oahu, Maui, Lanai, Molokai, Kauai, and Ka- 
hoolawe. After gathering together specimens, 
descriptions, and illustrations of the group, and 
after studying the original type specimen, de- 
scription, and locality, the following conclusions 
have been reached. There are at least four dis- 
tinct groups in the population. As the original 
plant described by Gray (1854) was located 
"on a mountain in the west division of Maui,” 
this Maui plant, a portion of which type speci- 
men is in the Bishop Museum Herbarium, is 
rightly the true H. Brackenridgei Gray. 
In 1930 Caum published two varieties: H. 
Brackenridgei Gray var. molokaiana Rock and 
var. kauaiana Caum. The holotypes for these two 
