ALABASTRA BORNEEXSIA. 229 



This species strongly resembles the Philippine Tristania 

 decorticata, Merr., and has been so reported by Robinson.* 

 However, it is at once distinguishable from the Philippine 

 species by its solitary stamens opposite each petal, a character 

 unknown in the genus 'Tristania except in the present species 

 and in T. anomala, Merr., It is readily distinguished from the 

 latter by its much larger, differently shaped leaves. 



Tristania dementis, sp. nov. 



Arbor parva, glabra ramulis junioribus exceptis in- 

 florescentiisque minute adpresseque cupreo-pubescentibus ; 

 foliis subcoriaceis, oblongo-obovatis, nitidis, usque ad 7.5 cm. 

 longis, obtusis ad late obtuseque acuminatis, basi cuneatis, 

 margine leviter recurvatis, subtus distincte puncticulatis, 

 nervis primariis utrinque circiter 15 tenuibus ; inflorescentiis 

 axillaribus, pedunculatis, circiter 3 cm. longis, dichotomis ; 

 fioribus 5-meris, circiter 3 mm. diametro, petalis glabris, orb'u 

 culari-obovatis, minute crenulatis ; staminibus 25 vel 30 in 

 phalangitis 5- vel 6-andris dispositis : ovario pubescente, 3- 

 loculare. 



A small tree, glabrous except the minutely appressed-. 

 cupreous-pubescent branchlets' and inflorescences. Branched 

 .terete, dark reddish-brown or nearly black when dry, the 

 ; branchlets more or less compressed-angular, reddish-brown. 

 Leaves subcoriaceous, oblong-obovate, 5 to 7.5 cm. long, 1.5 to 

 3 cm. wide, the upper surface greenish-olivaceous and shining 

 when dry, minutely and obscurely puncticulate, the lower 

 . surface pale-brownish, distinctly glandular-punctate, apex ob- 

 tuse to broadly and shortly blunt-acuminate, base cuneate, 

 margins somewhat recurved ; lateral nerves about 15 on each 

 side of the midrib, slender, not prominent, obscurely anas- 

 tomosing with the marginal nerves about 1 mm. from the edge 

 of the leaf; petioles brown. 5 to 9 mm. long. Cymes in the 

 upper axils, about 3 cm. long, peduncled, dichotomous, minute- 

 ly appressed-pubescent with cupreous hairs, rather few- 

 flowered. Flowers 5-merous, about 3 mm. long and wide, 

 their pedicels 1.5 to 2 mm. long, somewhat crowded on the 

 ultimate branchlets. Calyx turbinate, slightly pubescent, the 

 teeth 5, very broad, shallow, subacute. Petals glabrous, dull 

 white, orbieular-obovate, rounded, minutely crenulate, 1.2 mm. 

 long. Stamens in five phalanges opposite the petals, 5 or 6 

 in each group, the filaments 0.5 to 1 mm. long, united and 

 sparingly pubescent below. Ovary sparingly pubescent, 3- 

 celled; style glabrous, 1 mm. long. 



British North Borneo, Jesselton, Mrs. Clemens 9570, 

 October 23, 1915, on hillsides near dwellings, cultivated, the 

 bark shedding like that of Eucalyptus. 



* Philip. Journ. Sci. 4 (1909) Bot. 324. 

 R. A. Soc, No. 77, 1917. 



