1920] Ridley : Peninsular Siamese Plants. 93 



CUCURBITACEAE. 



105. Gynostemma crenulatum, sp. nov. 



Climber, very slender. Stems glabrous, angled and 

 grooved. Tendrils simple, slender. Leaves trifoliate, cen- 

 tral leaflets largest, sub-coriaceous, glabrous, elliptic, ovate, 

 blunt edge crenulate with a short spine in each notch ; nerves 

 5 pairs, elevate beneath, 2-2-5 in. long, 1-5 in. wide; 

 petiolule -1 in., petiole 1 in. long. Panicles lax, spreading, 

 hairy, about 7 in. long. Flowers (onh-^ males seen) minute, 



{)edicels very short. Sepals lanceolate, narrow. Petals 

 anceolate-acute, rather deeply cut (not elongate cuspidate). 

 Anthers 5, Tasan : Green ; climber ; 6901. 



This species is distinct from G. pedata, Bl. in the stiff er 

 leaflets, not serrate but with a few long crenulations, in the 

 notch of each a short spinelet. The flowers differ also in 

 the short lanceolate corolla-lobes with only a short point. 



ARALIACEAE. 



106. Heptapleurum venulosum. Seem. 



Koh Jam Yai off Takuapa : Tree ; inflorescence 

 greenish-white ; 6631. Distrih. India, Malay Peninsula. 



RUBIACEAE. 



107. Uncaria attenuata, Korth. 



Tasan : White ; stamens tipped brown ; climber ; 7023. 

 Distrih. Tenasserim, South to Singapore, Sumatra. 



108. Hedyotis capitellata, Wall. 



Nam Chut : White ; creeper ; 6663. Tasan : Yellowish- 

 white ; climber ; 6893. Distrih. Tenasserim, Malay Penin- 

 sula, Malay Islands, Yunnan. 



109. Ophiorrhiza hispidula, Wall. Cat. 6234. 



Tasan : Crimson ; 6949 : White ; 4 ft. ; 6896 : Tips 

 white, base dark pink ; 6963. Distrih. Tenasserim, Java. 



110. Mussaenda variolosa, Wall. 



Nam Chut : Flowers orange, bracts pale yellow ; 6650. 

 Distrih. Lower Burmah to Tenasserim. 



111. Greenia Jackii, W. A A. 



Koh Jam Yai off Takuapa : Tree ; inflorescence pink to 

 brownish green ; 6630. Distrih. Tenasserim, Malay Penin- 

 sula. 



112. Myrioneuron capitata, sp. nov. 



Woody unbranchcd shrublet 2 ft. tall. Leaves her- 

 baceous, elliptic oblanceolate, glabrous, narrowed to petiole ; 

 nerves 21 to 22 pairs, parallel ascending and connate in an 

 intramarginal nerve, midrib rather stout, 11 in. long, 2-75 

 in. wide, petiole 1 • 75 in. long. Stipules narrow, lanceolate, 

 long acuminate, -75 in. long. Head dense compact -5 in. 

 through, terminal on a peduncle 1 in. long. Bracts lanceo- 

 late-acuminate as long as the flowers, outer bracts round, 

 broad, -2 in. long. Sepals lanceolate-acuminate. Petals 



