1920] Ridley : Peninsular Siamese Plants. 101 



Koh Jam Yai off Takuapa : White ; climbing bush ; 

 6(322. AUied to J. deciissatum but nearly glabrous and with 

 shorter only puberulous hairy calyx-lobes, and petals dis- 

 tinctly larger. 



APOCYNACEAE. 



166. Rauwoliia perakensis, King. 



Tasan : Petals red, base of flower white ; 6912. Distrih. 

 Malay Peninsula. 



167. Alyxia lucida. Wall. 



Klong Bagatae : White climber ; 6575. Distrih. Malay 

 Peninsula. 



168. Vallaris macrantha, Ridl. n. sp. 



Woody shrub 15 ft. tall. Stem -5 in. through with 

 pith. Leaves membranous orbicular with a short point, 

 base round, minutely pustular above, pubescent beneath ; 

 nerves 6 pairs, reticulations conspicuous, wide beneath, 5*5 

 in. long, 5 in. wide ; petiole 1 in. long. Compound cymes 

 axillary lax, 6 in. long and wide, pubescent tomentose. 

 Bracts caducous, oblong lanceolate, acute, '25 in. long. 

 Pedicels -5 in. long, dilate upwards, slightly tomentose. 

 Sepals 5, oblong, recurved or patent, -25 in. long, tomentose. 

 Corolla pale yellowish green, tube broad, cylindric, -25 in. 

 long, limb 1 m. across, base broadly obconic pubescent, 

 outside and on the inner face of the 5 lobes oblong-lanceo- 

 late, -2 in. long. Stamens on the mouth of the cylindric 

 tube, base hairy, filaments glabrous. Anthers conic acumi- 

 nate hastate, hairy at base and tip with rather long deflexed 

 spurs at base. Style densely white hairy ; ovary bilobed 

 globose, densely white tomentose, top rounded. Tapli : Pale 

 yellowish green ; 15 ft. ; 6946. 



This remarkable plant is only allied to V. grandiflora, 

 Hemsley of China, from which it differs conspicuously in 

 its wide spreading axillary compound cymes, entirely whi- 

 tish tomentose. 



169. Cerbera odoUam, L. 



Koh Gab : White ; opening of tube only red ; 6604. 

 Klong Bagatae : White, centre red, bush ; 20 ft. ; 6570. 

 Distrib. East Asia. 



170. Holarrhena pauciflora, Ridl. 



Mainland shores of Takuapa : Flowers white, a dull 

 yellow stripe on outside of petals ; 6613. Distrib. Perils. 



171. Holarrhena densiflora, Ridl. 

 (Label missing) . Distrib. Perils. 



172. Ervatamia subcapitata. Wall. 



Tasan : White ; climber ; 4 ft. tall ; 7021 and 6824. 

 Distrib. Tavoy to Mergui. 



