CUCURBITACEAE 

 Gynostemma laxum (Wall.) Cogn. in DC. Monog. Phan. 3: 914. 

 1881. ;ic- ■ : iY-' (-'(' ^^('U 



Zaïwnia taxa Wall. List no. 3727. 1830, nomen nudiim, PI. As. Rar. 



2:29. 1831. 

 Gvnostcmina crcnulatum Ridl. Jour. Fed. Malay States Mus. 10:03. 



"l920. 

 Indo-China, Tonkin, Mount Bani, Petelot 5682, May, 1935, ait. 

 about 500 m. India to Burma, Siam, Sumatra, Java, Bornéo, and 

 Mindanao. 



King (Jour. As. Soc. Bengal 67(2): 41. 1898; Mater. FI. Malay. 

 Penin. 3: 385) accepted Clarke's idea that a single species was repre- 

 sented by the 3-foliolate (G. laxum Cogn.) and the 5-foliolate (G. 

 pcdatiimm. = G. pentaphyllum (Thunb.) Mak.) forms. Craib, how- 

 ever (FI. Siam. Enum. 1:766. 1931), considers that Cogniaux was 

 apparently justified in treating the plant with uniformly 3-foliolate 

 leaves as specifically distinct from the 5-foliolate form. In any case the 

 3-foliolate form has apparently not previously been recorded from Indo- 

 China. Craib placed G. crcnulatum Ridl. as a synonym of G. laxum 

 Cogn. 



70 JOURNAL OF THE ARNOLD ARBORETUM [vol. xix 



Gynostemma siamicum Craib, Kew Bull. 362. 1918, FI. Siam. Enum. 

 1: 767, 1931., ^'<-. :\ ■ \\f\- )[ ; "/ . / / 



Indo-China, Tonkin, Hoa Binh Province, near Muong Thon, route 

 from Hanoi to Hoa Binh, Petelot 5385, February, 1931, in open forests. 

 Siam. 



This agrées well with Craib's description and differs from G. laxum 

 Cogn. in exactly the characters that he emphasizes. 



