Polygonum malaicum Danser, Bull. Jard. Bot. Buitenz. III. 8:218. 

 f. 13. 1927. Merr. JAA 21: 366. 194D 



Polvgonum cliiiicnse Linn. var. malaicum Steward, Contr. Gray Herb. 



5(88): 73. 1930. 

 Indo-China: Tonkin, Chapa, Pételot 2227, August 1936, in open 

 1940] MERRILL, RECORDS OF INDO-CHINESE PLANTS, II 367 



forests at 1900 m, ait. Sumatra, Malay Peninsula, Burma {Dickasoii 

 5190, 5254), Siam, and Yunnan. 



This form may hâve been included by Courchet in his concept of 

 Polygonum chinense Linn., but it seems to me to be amply distinct from 

 that species. Danser suggested that Polygonum auriculatum Meisn. 

 Monog. Polygon. Prodr. 59 t. 6. 1826, type from Annam, which he had 

 net seen, might be a svnonym, in which case the latter name would hâve 

 priority. I judge from Meisner's detailed illustration that his species 

 is doser to P. chinense L. than to P. malaicum Danser; Steward placed 

 it as a synonym of the Linnean species. The type of P. chinense L. 

 was from the vicinity of Canton, China, where the species is of common 

 occurrence. 



Polyg-onum minus Huds. FI. .-Xngl. 148. 1762; Danser, Bull. Jard. Bot. 



Buitenz. III. 8: 174. 1927; Steward, Contr. Gray Herb. 5(88): 



63.1930. Merr. JAA 21 : 367. 1940 

 Indo-China: Tonkin, Phuc Yen Province, borders of small streams, 

 Pételot 2233, October 1935; Steward cites Pételot 315 as representing 

 this species. A widely distributed Eurasian species extending into the 

 tropics of the Old World. 



Polygonum palmatum Dunn, Kew Bull. 341. 1912; Steward, Contr. 

 Gray Herb. 5(88): 75. 1930. Meri'. JAA 21 : 367. 1940 



Polyç/oniim Mccboldil W. \V. Sm. Rec. Bot. .'^urv. India 6: 32. 1913. 



Indo-China: Tonkin, Chapa, Pételot 1618, July 1924. Assam. 



Polygonum Meeboldii W. W. Sm. was published one year later than 

 P. palmatum Dunn. both species being based on the same collection. 



Polygonum virginianum Linn. Sp. PI. 360. 1753, var. filiforme 

 (Thunb.) Merrill, comb. nov. Merr. JAA 21 î 367. 1940 

 Polygonum filiforme Thunb. FI ap. 163. 1784. 



To'vra 'rirgiiiiaiia Raf. var. jilifonnis Steward, Contr. Grav Herb. 

 5(88): 14. t. l.f.A. 1930. 



Indo-China: Tonkin, ar Van Linh, Pételot 2232, November 17, 

 1938, among calcareous cks. Japan to Kwangtung, Yunnan, and 

 Burma, with a closely al' ed form in Mindanao, the species in eastern 

 North America. 



VVhile Steward elected to recognize only Tovara Raf. as a group 

 worthy of generic rank from among the numerous proposed segregates 

 from Polygonum Linnaeus, sensu latiore, I hâve no personal opinion to 

 express, other than the gênerai statement that a detached and critical 

 considération of ail proposed generic segregates seems to be called for. 



