Pittosporaceae. 



Inflorescence terminal, axillary and cauline. 

 Leaves glabrous, seeds smooth. 



Flowers large pedicellate, capsule rough, glabrous P. insigne 



Leaves tomentose, seeds smooth. 



Flowers large, capsule bluish glaucous, deeply wrinkled P. Hawaiiense 



Flowers subsessile, capsule small, quadrangular smooth P. Kauaiense 



Leaves tomentose, seeds rough. 



Flowers nearly always terminal, capsule rough, tomentose P. confertiflorum 



Pittosporum glabrum Hook, et Arn. 



Hoawa. 

 (Plate 55.) 



PITTOSPORUM GLABRUM Hook, et Arn. Bot. Beech. (1832) 110; End. Fl. Suds. (1836) 



no. 1585; Gray, Bot. U. S. E. E. (1854) 229; H. Mann, Proc. Am. Ac. VII. 



(1867) 151 et Fl. Haw. Isl. (1867) 125; Hbd. Fl. Haw. Isl. (1888) 23; Del Cast. 



111. Fl. Ins. Mar. Pac. VI (1890) 110; Heller PI. Haw. Isl. (1897) 829. 



A small tree glabrous throughout; only the young shoots pubescent; leaves thin 



coriaceous, on slender branches, in loose whorls; spathulate to ovate oblong or oblanceolate, 



tapering at the base into a short petiole, the apex obtuse, rounded or acuminate; peduncles 



terminal, axillary or below the leaves, corymbose racemose, 6 to 12 flowered; sepals ovate 



acute 3 mm, glabrous; corolla 12 mm, white or cream-colored, the spreading tips 4 mm 



long; stamens nearly as long as the tube; style twice the length of the glabrous ovary; 



stigma truncate; capsule subglobose smooth, or rough, (wrinkled) two to three valved, the 



valves coriaceous, 25 mm in diam.; seeds smooth, angular. 



This is a variable species and presumably occurs on the whole Koolau range. 

 It was collected by the writer in Manoa and Pauoa valleys, also in Nuuanu Val- 

 ley* on Konahuanui, Mt. Olympus, and especially Palolo Valley, where it is ex- 

 ceedingly common. In Niu Valley occurs a plant which agrees fairly well with 

 those from the mountains back of Honolulu ; the leaves are little shorter and not 

 acuminate, neither are the capsules rough, but smooth and more or less oblong 

 rather than subglobose. It must, however, be referred to this species. 



It is a small tree 15 to 20 feet high and is peculiar to the rain, as well as the 

 drier forests of the main mountain range of the island of Oahu at an elevation 

 of 2000 feet. 



Pittosporum acuminatum Mann. 

 Hoawa or Papahekili. 



PITTOSPORUM ACUMINATUM Mann Proc. Am. Acad. VII (1867) 152, et Fl. Haw. Isl. 

 (1867) 125; Hbd. Fl. Haw. Isl. (1888) 22; Del Cast. 111. Fl. Ins. Mar. Pacif. 

 VI. (1890) 110; Pax in Engl. et Prantl Pflzfam. III. 2 a (1891) ID 1; Heller 

 PI. Haw Isl. (1897) 828. 



Leaves chartaceous, oblanceolate-acuminate, perfectly glabrous, 8 to 20 cm long, 

 2 to 4 cm wide, gradually merging into a short petiole of about 1 cm; axillary peduncles 

 very slender 2.5 to 6 cm with flower, with fruit 8 cm, corymbose-racemose, the peduncle and 

 pedicels hirsute, bracts subulate; flowers very fragrant, 5 to 12 or^even more, on pedicels 

 of 7 to 20 mm, sepals very narrow subulate, pubescent, petals cream colored, stamens as 

 long as the tube, anthers sagittate; style slender, as long as the corolla, often exserted, 

 stigma capitate; capsule subglobose, tomentose, rugose (wrinkled), seeds black, minutely 

 tuberculate. 



A very handsome, graceful tree with beautiful cream-colored, fragrant flowers. 

 Tree about 18 to 20 feet high. It is a very distinct species and differs from all 

 the rest of the Hawaiian Pittosporums in the slender long peduncles and 

 pedicels. 



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