38 Director' s Ayinual Report. 



l^uphorbia Rockii, sp. nov. 



Arbor 1-3.5 ™- alta, foliis oppositis, obovato-oblongis, inequalibus, ob- 

 tusatis, basi rotundatis, 8-12X2.5-3 cm. brevissime petiolatis vel sessilibus; 

 cymis axillaribus 3-4 cm. longis, pedicellis 5 mm. longis ; involucri campanu- 

 lati, lobis minimis, lanceolatis, acutis, glandulis transverse oblongis; capsulae 

 hexagono-obovatis, glabris, 2X2.2 cm. 



Type locality, Punaluu Mountains, Oahu, H.I. Forbes & 

 Rock, Sept. 14-21, 1908. 



An erect shrub or small tree four to twelve feet high. Leaves 

 opposite, obovate-oblong, obtuse, uneven-sided with a clasping 

 base, nearly sessile, 3-4.5 X 1-1.25 inches. Flowers in open axil- 

 lary cymes, 15-18 lines long. Involucre campanulate, minutely 

 hairy or glabrous on the outside, pubescent on the inside, lobes 

 ovate, minute, glands transversely oblong not appendiculate. 

 Style branches short, nearly free. Capsules large 9X12 lines, on 

 nodding peduncles. 



This tree was discovered by Mr. J. F. Rock some two months 

 before the gathering of the type material. The tree is distin- 

 guished by its large pink fruits, nearly sessile leaves and by its 

 open cymes. 



[214] 



