Rubiaceae. 



cylindrical, silky pubescent, 5 mm, the lobes one-third as long, with a patch of yellowish 

 hair underneath each lobe; anthers linear, slightly exserted, sessile; style densely tomentose, 

 protruding, divided into 4 to 6 filiform stigmatic branches, which are erect and not spread- 

 ing; fruits globose, 8 to 12 mm, purplish, with a gray pubescence, pyrenae 4 to 6, crowned 

 by the calyx lobes. 



This species differs very little from Bobea sandwicensis Hbd. Its outward ap- 

 pearance, color of leaves, and branching habit, are exactly the same in both species. 

 When neither in flower nor fruit it would be absolutely impossible to separate 

 the two species. The only difference is that in the species in question the 

 flowers are single and the fruits have from 4 to 6 pyrenae, while in Bobea 

 sandwicensis the inflorescence is cymose but usually of only 3 flowers, and with 

 fruits of 2 pyrenae ; otherwise the trees could not be distinguished. 



Bobca Hookeri Hbd. was collected by the writer on Molokai in the open dry 

 gulches below Mr. G. P. Cooke's residence, Kauluwai, at an elevation of 2000 

 feet, only a single tree was observed, (no. 6177 flowering and fruiting March 26, 

 1910). It also grows on the lava fields of Auahi, district of Kahikinui, southern 

 slopes of Mt. Haleakala, Maui ; there the writer met with a single tree with a 

 large trunk vested in a gray large-scaly bark, (see plates 182 and 183) ; it had 

 three main trunks each of a foot or more in diameter. It is associated with 

 Alectryon macrococcus, Tetraplasandra meiandra var., Pittosporum, Dracaena 

 a urea, and others. It is one of the rarest trees in the territory. Hillebrand 

 records it from Oahu, from the valleys of AVailupe and Makaleha, but it was 

 never met with by the writer on Oahu. 



Bobea sandwicensis Hbd. 

 Ahakea. 



BOBEA SANDWICENSIS Hbd. Fl. Haw. Tsl. (1888) 174; Del Cast. 111. Fl. Ins. Mar. Pac. 

 VI. (1890) 193. Chomelia ? sandwicensis Gray in Proc. Am. Acad. IV. (1860) 

 38. Guettardella sandwicensis H. Mann Proc. Am. Acad. VII. (1867) 170. 

 Branehlets pubescent, leaves as in Bobca Hookeri but pubescent underneath and puberu- 

 lous above; inflorescence eymose, 3 flowered in the writer's material, 3 to 7 flowered accord- 

 ing to Hillebrand, peduncle tomentose about 10 mm, the lateral flowers sessile, calyx 

 and corolla silky tomentose, yellowish-green; bracteoles 1 mm; calyx as in Bobca Hookeri, 

 the lobes larger; tube of corolla cylindrical, 8 mm, anthers exserted, style in all the 

 writer's specimens only 1.5 mm long and slightly bifid, exserted or quite short according 

 to Hillebrand; drupe globose 5 mm in diameter, blackish, with a gray pubescence, with two 

 bony pyrenae. 



The writer collected this species on the Island of Lanai on the dry open 

 slopes below Koele, and near the edge of the Mauna Lei canyon. It is quite 

 numerous and grows in company with Siderorylon spathulatum, Gardenia Brig- 

 hami, Chrysophyllum polynesicum, and others. 



It is a medium sized tree about 20 to 25 feet in height, has a short trunk 

 (about 4 feet), but a large round and spreading crown, and is very freely 

 branching. (Flowering and fruiting July 26, 1910. Rock and Hammond, no. 

 8038.) 



443 



