RUTACEAE 



297 



not listed in Index Kewensis, is validly published by Burman in 

 the general index to the Herbarium Amboinense by citation of 

 the Rumphian name and description. It is to be noted that 

 Burman on page [11] of the Index Universalis refers Limo 

 decumanus Rumph. to Citrus aurantium Linn. Swingle, in 

 Sargent PL Wils. 2 (1914), has already pointed out that Citrus 

 grandis Osbeck antedates the publication of Citrus decumana 

 Linn, and accordingly accepted Osbeck's specific name. Three 

 forms described by Rumphius, //, III, and IV, are all probably 

 referable here; although Hasskarl, Neue Schlussel (1866) 31, 

 places them under the varieties pyriformis Hassk., leucosarca 

 Hassk., and dulcis Hassk., respectively. 



CITRUS OBVERSA Hassk. Cat. Hort. Bogor. (1844) 218. 

 Limo ferus Rumph. Herb. Amb. 2: 106, t. 26, f. 3, t. 28. 



In this reduction I merely follow Hasskarl, Neue Schlussel 

 (1866) 32. The figures strongly resemble forms of Citrus 

 hystrix DC, as de Candolle's species is currently interpreted; 

 and Limo ferus Rumph., with Citrus obversus Hassk., may be 

 merely a form of this polymorphous species. At any rate, 

 the specific status of Citrus obversa Hassk. is very doubtful. 



CITRUS BERGAM I A Risso Hist. Nat. Or. Europ. Merid. (1826-28) t. 53. 

 Limo taurinus Rumph. Herb. Amb. 2: 105. 



The status of both Citrus bergamina Risso, as a species, and 

 of Limo taurinus Rumph. is very doubtful. The reduction fol- 

 lows Miquel and Hasskarl. I suspect that Limo taurinus is 

 merely a form of Citrus hystrix DC. 



CITRUS MEDICA Linn. Sp. PL (1753) 782. 



Malum citrium Rumph. Herb. Amb. 2: 99, t. 25. 



This was placed by Loureiro, Fl. Cochinch. (1790) 465, under 

 Citrus medica Linn., and by Hasskarl, Neue Schlussel (1866) 

 31, under Citrus grandis Hassk. var. oblonga Hassk. 



CITRUS HYSTRIX DC. Cat. Hort. Monsp. (1813) 97. 



Limo tuberosus Rumph. Herb. Amb. 2: 101, t. 26, f. 1. 

 Limo unguentarius Rumph. Herb. Amb. 2: 103. 

 Limo agrestis Rumph. Herb. Amb. 2: 104, t. 27. 



The forms with the rugose fruits appear to be the same as 

 the Philippine form described by Blanco as Citrus torosa. Limo 

 tuberosus has been reduced to Citrus medica Linn, var., to C. 

 hystrix DC. var., and to Citrus bergamia Risso var. unguen- 

 taria Roem. Limo unguentarius has been reduced to Citrus 

 medica Linn, var., to C. hystrix DC. var., and to C. bergamia 



