Apocynaceae. 
This most interesting species is a small tree 15 to 25 feet in height and re- 
sembles somewhat the Alaa or Sideroxylon sandwicense. The native name of 
this rather rare tree is Kaulu, according to Hillebrand. The locality for the 
tree is Oahu, Nuuanu Valley, and Makaleha Valley of the Waianae range. In 
the latter place the tree was observed by C. N. Forbes and also by a student of 
the College of Hawaii, but has not been collected by the writer. The tree seems 
to be conspicuous on account of its bright red double fruits. 
RAUWOLFIA Linn. 
Calyx small, deeply 5-cleft, with obtuse or acute, imbricate lobes, glandless. Corolla 
salver-shaped, evlindrical, constricted at the sealeless Robe tube dilated at the p ora 
f insertion of the stamens, lobes sinistrors s small, with obtuse or acu 
anthers, inserted at the middle of the tube aie fire iis Dusen cup-shaped, truncate ne 
lobed. Ovaries 2, superior, entirely free, or nate, at the base; ovules paired in each 
oe oe amiga style filiform with a short eaicd stigma with a membraneous ring 
igs distinct, feacauily connate at the base, obcordate, with crustaceous 
ran Y Ges ds with uniform oo. —Glabrous rarely tomentose trees or shrubs with 
usually “opposite or whorled lea Flowers small in compound often umbellate cymes, 
at first terminal. 
The genus Rauwolfia consists of about 45 species, which occur in the tropics of 
the old and new world. In the Hawaiian Islands only one species is represented. 
The Hawaiian species has often been confused with Ochrosia parviflora (Forst.) 
DC. and has even been described twice by De Candolle, once as Ochrosia sand- 
wicensis, which now stands as a synonym. 
Rauwolfia sandwicensis A. DC. 
Hao. 
(Plate 166.) 
RAUWOLFIA SANDWICENSIS A. DC. Prodr. VIII. (1844) 339;—H. Mann 
Acad. VII. (1867) 197; —Wawra in Flora pers 367 s—— —Hpbd. Fl. Haw. fa 1888) 
295;—Del Cast. Il. FI. Ins. Mar. Pac. VII. (1892) 232;—K. Schum. in Engl. et 
Prantl Piiziam: EV. <2: Lees 153:—Heller Plants Haw. Isl. (1897) 878.— 
Cerbera ela Hook. (not Forst.) Bot. Beech, (1832) 90,—Ochrosia 
are OD OEE os ‘ae. aL Snes 357 (not Gray). 
Leaves 5 in a es elliptico oblong, a 
petioles ‘of 1.5 to 3 em (in all of the ie it s Ee aptenal and n mm 
Hillebrand), with 5 to 12 stipitate glands in each axi illa; aoe crowded ate 4 um- 
bellately compound cymes of the same length or longer than the petioles, at ae terminal 
ate at both ends, pale pga? on 
t 2 to 3 s given in 
ae) 
5 
5 
oe 
> 
-® 
a J 
wn 
nm 
=] 
o 
scantil hairy seers acted below the constricted ea the lobe 
carpel; drupe et eit | obcordate, taeeky emarginate at the top, 8 to 
and more in width, fleshy, black when mature; albumen seanty, radicle terete, superior. 
The Hao is a inet sized tree with milky sap. When growing in localities 
with rich soil and occasional rainfall it develops a straight trunk 6 to 12 inches 
in diameter and a total height of sometimes over 20 feet. When growing on 
the rough aa lava flows on the leeward sides of the Islands, as on Auahi, Maui, 
on the southern slopes of Mt. Haleakala, it is a more or less stunted shrub. 
It resembles the Holei very much and when not in flower or fruit is not often 
easily distinguished from it. The leaves are of a lighter green than the Holei 
and not quite as thick in texture; it differs mainly from it in its small black 
fruits which are obcordate. 
409 
