Rubiaceae. 



and pubescent underneath along the nerves, which are almost destitute of glands ; 

 the panicle is also pubescent and inclined." 



This seems to apply very much to the species in question, but it is really quite 

 distinct from St. Hawaiiensis, in the leaves, fruits and dentate calyx-iobes, be- 

 sides in the whole aspect of the tree, which is much smaller (see plate 188). 

 Collected flowering and fruiting in the above mentioned locality, April, 1911, 

 and July, 1911, type no. 8779 in the College of Hawaii Herbarium. 



The species also occurs on the Parker ranch, Hawaii, and in the forests of 

 Paauhau, Hamakua, Hawaii. 



Var. Molokaiensis Rock var. nov. 



Leaves as in the species, chartaceovis, quite large; panicles slender, drooping, pubescent, 

 about 10 era long, including the 6 cm long peduncle; calyx-limb dentate; corolla as in the 

 species; drupe oblong, larger than in the species. 



The panicles of this variety are not so open and wide, but rather close and of 

 only 1 to 2 whorls. It occurs in the rain forests of Molokai, especially at Ka- 

 luaha on the leeward side. It was collected flowering and fruiting April, 1910, 

 the type is no. 7085 in the College of Hawaii Herbarium. 



PSYCHOTRIA Linn. 



Flowers hermaphrodite. Calyx short, 5 to 6 toothed. Corolla funnel-shaped, tubular 

 or campanulate. Stamens inserted in the throat, partly exserted. Ovary 2- (rarely 3-5) 



celled. ITruit 2 to 5 seeded Shrubs or trees, rarely herbs. Leaves whorled or opposite, 



stipules interpetiolar. Flowers in terminal cymose corymbs, rarely axillary, white in the 

 Hawaiian species. 



The genus Psychotria consists of about 350 species or more. It is distributed 

 over tropical Africa, the Malayan archipelago, East India, Brazil; it also occurs 

 in China, but is not known from Japan. In the Hawaiian Islands three species 

 are found of which two, P. grandiflora and P. hirta, are peculiar to Kauai, while 

 the third, P. hexandra, occurs on Oahu and Kauai but on none of the other islands 

 of the group. The genus occurs also in Fiji and other Pacific Islands. 



KEY TO THE SPECIES. 



Flowers in a trichotomous corymbose cyme. 



Leaves acute at both ends, glabrous P. hexandra 



Leaves obovate, cuneate, pubescent underneath P. hirta 



Flowers large in a panicle with verticillate rays P. grandiflora 



Psychotria hexandra Mann. 



PSYCHOTRIA HEXANDRA Mann in Proc. Am. Ac. VII. (1867) 170; — Wawra in Flora 

 (1874) 328;— Hbd. Fl. Haw. Isl. (1888) 181;— Del Cast. HI. PI. Ins. Mar. Pac. VL 

 (1890) 198;— Heller PI. Haw. Isl.' (1897) 902. 



Branches quadrangular, compressed; leaves obovate or obovate-oblong, 7.5 to 15 cm 

 long, 2.5 to 3.5 cm wide, on petioles of 6 to 25 mm, shortly and abruptly acuminate, cuneate 

 at the base, membraneous, pale and glabrous underneath; stipules one on each side, broad, 

 oblong, 8 to 12 mm long, caducous, leaving a fringe of hairlets in the axils; flowers in a 

 terminal semi-erect, corymbose, glabrous cyme of not more than 5 to 6 cm, the peduncle 12 

 to 25 m; bracteoles below the calyx ovate, acute 4 to 2 mm; calyx 6 mm, with 6 toothlets; 



455 



