Flora of the Malayan Peninsula. 145 



Flowers '3 in. long, numerous, on pedicels shorter or longer than them- 

 selves, pubescent, bracteolate at the base. Calyx campanulate ; the tube 

 small, narrow ; the 4 lobes thin, lanceolate, much longer than the tube. 

 Corolla longer than the calyx ; its lobes 5, imbricate, ovate-lanceolate, 

 acute, spreading slightly, imbricate. Anthers alternately quite free, at 

 first slightly cohering in the upper half, linear, not winged but with a 

 flattened, 2-pored apical appendage, the bases thickened and cordate : 

 filaments free, nearly half as long as the anthers. Style as long as the 

 anthers ; stigma filiform. 



Perak : King^s Collector 2242. — Distrib. Sumatra. 



4. Argostemma Yappii, King n. sp. Glabrous ; stem erect, un- 

 branched, 6 to 12 inches high, succulent, when dry nearly as thick as a 

 goose-quill at the base, tapering rapidly upwards. Leaves almost equal in 

 size, thick (almost fleshy when fresh), elliptic, narrowed pretty equally 

 at both ends, shining, upper surface pale-olivaceous, minutely scaly 

 when dry, the lower olivaceous yellow, the midrib distinct and the 6 to 

 8 pairs of spreading main-nerves indistinct on both : length 2 to 3"5 in. ; 

 breadth '75 to 1"35 in., petiole "15 to "5 in., winged in its upper half. 

 Stipules free, ovate-oblong, blunt, "4 to "7 in. long. Cymes terminal, 

 trichotomous, on pedicels exceeding an incli in length, with a whorl of 

 bracteoles at the apex and (like the branches) pink when fresh, branches 

 often trichotomous. Flowers few, '5 in. long, on slender pedicels longer 

 -than themselves. Calyx campanulate ; the lobes 5, triangular, acute, 

 spreading, as long as the tube. Corolla more than twice as long as the 

 calyx, green; its 5 lobes oblong-lanceolate, sub-acute, spreading, much 

 longer than the short tube and slightly longer than the staminal cone. 

 Anthers lanceolate, dehiscing longitudinally, coherent by the marginal 

 wings of the connective, shortly apiculate, slightly shorter than the 

 filiform style : stigma small. 



Perak : Scortechini 245, 1334 ; Wray (no number) ; Yapp 435. 



Named in honour of Mr. R. H. Yapp who, as botanist, accompanied an explor- 

 ing party sent to the Malayan Peninsula by the University of Cambridge. 



5. Argostemma membranaoeum, King n. sp. Glabrous; except for 

 a few slender adpressed hairs on the upper surface of the leaves and on 

 the calyx and pedicels. Stem erect, 8 to 10 in. high, thinner than a 

 goose-quill, angled. Leaves sub-equal, few, scattered, large, thinly 

 membranous, green when dry, slightly unequal-sided, the apex sub- 

 acute ; the base broadly ovate-cordate, main-nerves 4 or 5 pairs, the 

 lower one branched on the side and spreading, the upper ascending, all 

 distinct and pale on both surfaces, length 2*5 to 5 in. ; breadth 1*5 to 

 3*5 in. ; petiole about as long as the blade. Cymes axillary and termin- 

 al, condensed, 6- to 12-flowered, on long, slender, sometim s puberulous 



35 



