CONVOLVULACEAE 



445 



The reduction of Convolvulus marinus Rumph, to Convolvulus 

 pes-caprae Linn, was first made by Linnaeus, in Stickman Herb. 

 Amb. (1754) 24, Amoen. Acad. 4 (1759) 132, Syst. ed. 10 (1759) 

 924, Sp. PI. ed. 2 (1762) 226, which is certainly the correct 

 disposition of it, although it is now placed in Ipomoea rather 

 than in Convolvulus. The figure, which is good, has very gen- 

 erally been cited by subsequent authors either under the Linnean 

 name or under the various synonyms cited above. 



IPOMOEA GRACILIS R. Br. Prodr. (1810) 484; House in Ann. N. Y. Acad. 

 Sci. 18 (1908) 248. 



Ipomoea denticulata Choisy in Mem. Soc. Phys. Genev. 6 (1833) 447. 

 Ipomoea littoralis Blume Bijdr. (1826) 713. 



Convolvulus denticulatus Desr. in Lam. Encycl. 3 (1791) 540, non 



Ipomoea denticulata R. Br. 

 Ipomoea choisy ana W. F. Wight in Contr. U. S. Nat. Herb. 9 (1905) 



298. 



Convolvulus riparius Rumph. Herb. Amb. 5: 435, t. 159, f. 2. 



Amboina, Paso and Batoe gadjah, Robinson PI. Rumph. Amb. 399, August 

 5, 1913, in thickets back of the beach and on grassy hillsides, altitude about 

 200 meters. 



No definite reduction has been suggested for Convolvulus ri- 

 parius Rumph. other than that it represents a species of Ipomoea. 

 The figure corresponds closely with Ipomoea gracilis, but the 

 description as given by Rumphius does not agree so well. It 

 is probable that more than one species was included by Rumphius 

 in his description, as he indicates two forms under the names 

 minor and major. Again this may be the correct disposition of 

 Convolvulus marinus minor Rumph. Herb. Amb. 5: 433, that 

 Hasskarl, Neue Schliissel (1866) 143, suggests may be the same 

 as Ipomoea rugosa Choisy or Convolvulus flagelliformis Roxb. 

 Both of these, however, are synonyms of Ipomoea beladamboe R. 

 & S., a species known only from India and Ceylon, so that the 

 Rumphian plant has nothing to do with the latter species, what- 

 ever else it may be. 



IPOMOEA INDICA (Burm.) comb. nov. 



Convolvulus indicus Burm. Index Universalis Herb. Amb. 7 (1755) [6] 

 (type!). 



Ipomoea congesta R. Br. Prodr. (1810) 485. 

 Convolvulus caeruleus Rumph. Herb. Amb. 5: 432. 



The Rumphian species is the whole basis of Convolvulus indicus 

 Rurm., which is not listed in Index Kewensis. Hasskarl, Neue 

 Schliissel (1866) 143, reduced it to Ipomoea nil (Linn.) Roth. 

 While Roth's species occurs in Amboina, Rumphius's description 



