Rutaceae. 



rather rambling branches. Hillebrand's material came from Kau and South 

 Kona. 



Var. racemiflcra Rock var. nov. 



Leaves ovate, cordate at the base, bluntly, acute, glabrous above, puberulous under- 

 neath, on compressed hirsute petioles; panicles racemose, terminal and in the axils of 

 the leaves, often more than 6 cm long, with yellowish pubescence; flowers small, numer- 

 ous, stamens wanting in the fertile flowers, ovary tomentose. 



This new variety is a small tree with broad flat crown, and reaches a height of 



10 to 15 feet. The branches are stout and woody to the last ramification. It 

 occurs on the rough aa lava flows on the southern slope of Mt. Haleakala, Maui, 

 between the huge blocks of lava, at an elevation of 1500 feet, where it is in com- 

 pany with Reynoldsia sandwiccnsis and Alpliitonia excelsa, the most predominant 

 trees in the district. It was collected by the writer in flower, November, 1910. 

 The type is no. 8676 in the College of Hawaii Herbarium. The native name of 

 the tree is Manena. 



PLATYDESMA Mann. 



Flowers hermaphrodite. Sepals 4, roundish, broadly imbricate. Petals 3, large, 

 imbricate or convolute. Discus flat, slightly 4 to 8 lobed. Stamens 8 inserted at the 

 margin of the discus; the filaments flat, ovate or ovate-lanceolate, united into a wide 

 tube, with elongate sagittate anthers, with linear anther cells converging at the apex. 

 Carpels 4, united, each with 5 to 8 ovules suspended from a broad funiculus, hemitropous. 

 Ovary deeply lobed. Style terminal, undivided, with thick stigma. Fruit a dry 4-lobed 

 indehiscent or loculicidal capsule, with thin endocarp, with 2 or more seeds in each cell- 

 Seeds subglobose, with black shining crustaceous testa, and with albumen. Embryo in 

 the middle of the albumen, with thin, broad, roundish cotyledons and short radicle. 

 Small trees or shrubs with strong pepsin odor, and opposite or whorled, single entire 

 leaves. Flowers large in axillary cymes. 



The genus Platydesma is peculiar to the Hawaiian Islands and consists of 

 three endemic species, only one of which is arborescent. PI. rostratum, a shrub 

 branching from the base, with rostrate or beaked capsules, is peculiar to Kauai, 

 while PL cor nut um is found on Oahu. PI. campamilatum occurs principally on 

 Oahu, but is represented on the other islands in various forms. Pelea auriculae- 

 folia Gray has erroneously been referred to Platydesma by both Hillebrand and 

 Engler. Leveille described two species collected by Abbe Faurie, both from the 

 Punaluu Mts., Oahu. One, Platydesma Fauriei, is undoubtedly PI. campanu- 

 latum ; the other, PL oalmensis, is probably referable to PI. cornutum, which the 

 writer collected in the Punaluu Mts. Leveille in his description of his second 

 new species says : petalis luteis ? None of the Hawaiian Platydesma have yellow 

 petals, but are of a waxy white or cream color. 



Platydesma campanulatum Mann. 



Pilo kca. 

 (Plate 91.) 



PLATYDESMA CAMPANULATUM Mann Proc. Bost. Soc. Nat. Hist. X. (1866) 317, et 

 Proc. Am. Ac. TIL (1867) 160. et Fl. Haw. Isl. Proc. Ess. Ins. V. (1867) 169, 

 et Mem. Bost. Soc. Nat. Hist. I. 4. (1869) 530, pi. 22; Wawra in Flora (1873) 



241 



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