228 ALABASTBA BOKNEENSIA. 



This species, like the next, is anomalous in Tristania bw 

 having but a single stamen opposite each petal, and this cha- 

 racter alone might be deemed sufficiently important- to warrant 

 describing the present species as a new generic type. How- 

 ever, as the fruits are unknown, and as in all other characters 

 the plant corresponds with 'Tristania, I have so described it. 

 In some species of Tristania the reduction of the number of 

 stamens is very marked ; I have a specimen of T. sumatrana, 

 Miquel, from Billiton in which there are but two or three 

 stamens opposite each petal, while in the Philippine T\ decor- 

 ticata there are but three stamens opposite each petal, so that 

 it is not surprising to find a plant that is a Tristania in all 

 respects, except its stamens, in which the reduction in the 

 number of stamens has gone to the extreme of one stamen for 

 each petal. 



Tristania pentandra, sp. now 



Frutex 2 ad 3 m. altus novellis inflorescentiisque exceptis 

 glaber; foliis alternis, oblongis ad oblanceolatis, coriaceis, in 

 siccitate brunneis, nitidis, usque ad 9 cm. longis, utrinque sub- 

 aequaliter angustatis acuminatisque, haud puncticulatis, 

 nervis utrinque circiter 18, adscendentibus, tenuibus, obseuris; 

 inflorescentiis axillaribus, pubescentibus, pedunculatis, circiter 

 2.5 cm. longis; foribus 5-meris, 2 mm. longis, staminibus 5; 

 ouario 3-loculare.. 



A shrub 2 to 3 m. high, the younger branchlets and 

 inflorescences brown-pubescent, the very young leaves spar- 

 ingly pubescent, otherwise glabrous. Branches terete, dark- 

 brown, the branchlets nearly black when dry, irregularly 

 angled or subterete. Leaves crowded, alternate, oblong to 

 oblanceolate, brown and somewhat shining when dry, not 

 glandular-punctieulate, 6 to 9 cm. long, 1.5 to 2.5 cm. 

 wide, subequally narrowed and acuminate at both ends, the 

 apex blunt-acuminate ; midrib impressed on the upper surface, 

 prominent beneath, the lateral nerves slender, obscure, ascend- 

 ing, about 18 on each side of the midrib, anastomosing with 

 the slender submarginal veins about 1 mm. from the edge of 

 the leaf. Cymes in the uppermost axils, peduncled,- brown- 

 pubescent, about 2.5 cm. long, 1 to 1.5 cm. wide, the flowers 

 rather numerous, crowded, 5-merous, their pedicels 1.5 to 2 

 mm. long. Calyx pubescent, 2 mm. long and wide, sub- 

 turbiuate or turbimite-urceolate, the teeth triangular, acute, 

 0.5 mm. long. Petals 5, orbicular-obovate, glabrous, 1 mm. 

 long, rounded. Stamens one opposite each petal, their fila- 

 ments glabrous, 0.8 mm. long. Ovary pubescent, 3-celled. 



Sarawak, Mount Poe, Foxworthy 378, June 3, 1908, 

 near the summit, altitude about 1700 meters, the flowers yel- 

 low, fragrant. Known to the Dyaks as bindang. 



, Jour. Straits Branch 



