Rubiaceae. 
true B. elatior, with smaller leaves, and fruits with only two pyrenae. The 
whole aspect of the tree is different from the true B. elatior occurring 1000 feet 
higher. 
Hillebrand enumerates a variety ~. brevipes, and gives the length of the 
peduncles at 3 lines or 6 mm; in a foot note, however, he states: ‘‘the single 
flowers are on a peduncle of 12 to 20 lines or 24 to 40 mm. 
On the Island of Molokai in various districts, as in Wailau Valley, Mapuleho, 
and Kaluaha occurs a species of Bobea which at first glance would appear to be 
B. elatior. However, the fiowers are single and usually with 11 pyrenae. The 
tree is entirely glabrous in all parts. It may be Gray’s B. brevipes, but his 
description: ‘‘pedunculis brevibus unifloris?’’ would speak against it, and there- 
fore the writer would suggest the name: Bobea elatior Gaud. var. Molokaiensis 
Rock var. nov. The type is 7028 in the College of Hawaii Herbarium.  Col- 
lected flowering and fruiting Wailau Valley, Molokai, April, 1910. It is a small 
tree about 20 to 25 feet in height with a slender straight trunk. 
On the Island of Kauai the writer observed several trees of Bobea, one oc- 
curring in the mountains of Halemanu in the dense forest, a rather large tree 
with a broad round crown. It is known to the natives as Akupa. Its leaves 
are ovate, bluntly acute, or obtuse or rounded at both ends and are on petioles 
of 4 mm, or even subsessile, the branchlets, petioles and leaves are hirtulose with 
whitish hair. As the tree was neither in flower nor in fruit its diagnosis is un- 
certain ; it will probably prove to be a new species of Bobea when complete ma- 
terial is at hand. 
On the lower mountain slopes back of Makaweli, Kauai, occur a few small 
trees which may be referred to Hillebrand’s Bobea Manni, though all peduncles, 
which are rather short, drooping and hirsute, are single flowered and would 
therefore come under Gray’s B. brevipes. There is however some doubt in the 
writer’s mind in regard to the specific value of Bobea Mannii which, with the 
exception of the three flowered inflorescence, agrees well with Gray’s B. brevipes. 
Until the type material can be examined, these questions cannot be definitely 
settled. 
Bobea Hookeri Hbd. 
Ahakea. 
(Plates 181, 182, 183.) 
BOBEA HOOKERI Hbd. Flora Haw. Isl. (1888) oe — Schum. in Engl. et Prantl 
Pfizfam. IV. 4. (1891) 96.—Rhytidotus sand wi Hook. f. Icon, Plant. (1870) 
tab. 1071;—Del Cast. IN. Fl. Ins. Mar. Pae. VI. “(1890) 192. 
Branches and branchlets terete, the latter og bak ona ha hapte Sra en. 4 
mm; leaves ovate, slightly and irregularly crenulate, nspar avy margin, 
acuminate, 6 to 9 em long, 3 to 5 em wide, peat ee eae an ucid tae dark green 
above, a panernenek. with reddish midrib and petioles, the vere 6 to 12 mm, pubes- 
cent, as are the young pratt pipe single, usually axillary or in the axils = fallen 
leaves, on ae of 1m m and even slightly longer; ea tube 3 m ubes- 
cent, with 4 many-nerved wi sie lobes of 4 to 5 mm, reticulately veined; saan tube 
441 
