I 



li 



H. N. Ridley: Botany of Gnnong Tahan. 151 



Bracts very small, lanceolate, scurfy brown ; pedicels jjj inch 

 long; ovary obconic; petals o\'ate-obtuse, connate, as long as 

 the ovary; sepals reduced to minute points. Stamens very 

 short; filaments as long as the elliptic-ovate, obtuse, deeply 

 grooved anthers. Disc umbonate, rugose. 



On the Padang in small woods. Endemic. 



Most nearly allied to H. Hullettii, King, but a taller 

 slenderer plant with smaller leaves. 



63. Heptapleukum coriifolium, Ridl. Common on 

 the Padang. A fairly large erect shrub here, about 8 feet tall. 

 On Gunong Berumbun in Perak, where the type was found, it 

 was adwarf shrub only a couple of feet tall. 



GAMOPETALiE. 



CAPRIFOLIACE^. 



64. Viburnum longistamineum, n. sp. 



A shrub about 12 feet tall. Leaves opposite, elliptic-cus- 

 pidate, base cuneate, membranous, glabrous, with four pairs of 

 nerves, slender above, fairly stout, elevate beneath, 3J-4J 

 inches long, 2 inches wide, petiole half an inch long, all 

 glabrous except for a tuft of hairs in the nerve-axils. Corymb 

 terminal on peduncle, 2 inches long; branches umbellate, f 

 inch long, secondary branches \ inch long, umbellate, all sub- 

 glabrous with a few white hairs. Bracts very sm^I, ovate. 

 Flowers sessile, white ; calyx oblong, with 5 ver}- short lobes, 

 ovate, margins ciliate. Corolla shortly campanulate, with 5 

 ovate spreading lobes, white; whole flower \ inch long and as 

 wide. Stamens 5 ; filaments four times as long as the corolla, 

 spirally twisted, \ inch long, white ; anthers elliptic, obtuse, 

 dorsifixed. Pistil short conic, truncate, ribbed ; stigma small, 

 conic. 



Woods by the streams on the Padang at 5,600 feet 

 elevation. 



Allied to V. sanibucinum, BL, the common low-country 

 species, but nearly glabrous, with a smaller corymb (2 inches 

 across) and very long projecting stamens. 



RUBIACE^. 



65. Argostemma involucratum, Hemsley. Common on 

 banks of streams on the Padang. 



Distribution. All the higher hills of the Peninsula. 



*66. Argostemma muscicola, Ridl. op. cit.- p. 310. 

 Common on banks of streams in the Padang, also at Wray's 

 Camp. This plant, besides being a tufted erect herb, creeps 

 with a slender stem and distant leaves. Endemic. 



67. Argostemma elongatum, n. sp. 



Stem succulent, creeping, 2 feet or less long, with slender 

 roots from the nodes, which are 3 inches apart. Leaves very 

 unequal, the larger ones thin, succulent, glabrous, ovate- 

 acuminate, base rounded, pale beneath, with 10 to 12 pairs of 



