130 



RUMPHIUS'S HERBARIUM AMBOINENSE 



ALOCASIA Necker 



ALOCASIA M ACRORRH IZA (Linn.) Schott Melet. (1832) 18. 



Arum macrorrhizon Linn. Sp. PL (1753) 965. 



Arum mucronatum Lam. Encycl. 3 (1789) 12 (type!). 



Arum silvestre I latifolium Rumph. Herb. Amb. 5: 310. 



Arum indicum sativum Rumph. Herb. Amb. 5: 308, t. 106. 

 Amboina, Kati-kati and Halong, Robinson PI. Rumph. Amb. 110, Sep- 

 tember, 1913, near streams, altitude 40 to 70 meters, locally known as 

 bira and bira puti. 



Arum indicum sativum Rumph. was originally reduced by 

 Linnaeus, with doubt, to Arum arborescens Linn., in Stickman 

 Herb. Amb. (1754) 22, Amoen. Acad. 4 (1759) 131, but is 

 entirely different from this species. Lamarck, Encycl. 3 (1789) 

 12, made it the type of his Arum mucronatum. Loureiro, Fl. 

 Cochinch. (1790) 536, referred it to his Arum indicum, which 

 is supposed to be a synonym of Colocasia indica Engl. Forster, 

 PL Esculent. (1768) 58, correctly reduced it to Arum macrorrhi- 

 zon Linn. = Alocasia macrorrhiza (Linn.) Schott. Rumphius 

 very briefly described three forms; namely, I nigrum, II fuscum, 

 and III album, the first of which Hasskarl, Neue Schliissel (1866) 

 126, referred to typical Alocasia indica Schott, and the last 

 two he referred to Colocasia indica Kunth var. atroviridis Hassk. 

 and C. indica Kunth var. pallida Hassk., respectively, but Colo- 

 casia indica Kunth, non Engl., is supposed to be a synonym of 

 Alocasia indica Schott. The descriptions are so very short that 

 it is impossible definitely to determine just what forms were 

 intended, but in all probability they were merely variants of 

 Alocasia macrorrhiza (Linn.) Schott. I can see no valid reason 

 for considering that Arum silvestre I latifolium Rumph., Herb. Amb. 

 5: 310 (non t. 107), represents other than a form of Alocasia 

 macrorrhiza Schott; see Alocasia longiloba Miq. 



ALOCASIA LONGILOBA Miq. Fl. Ind. Bat. 3 (1857) 207? 



Arum silvestre II medium Rumph. Herb. Amb. 5: 310, t. 107. 

 Amboina, Soja, in forests, altitude about 400 meters, Robinson PI. 

 Rumph. Amb. 109, August 2, 1913. 



The specimen lacks the spathe, but presents the f ruiting spadix. 

 It unquestionably represents the form figured by Rumphius under 

 Arum silvestre; and I consider that the figure conforms to Arum 

 silvestre II medium rather than to Arum silvestre I latifolium; 

 although it has very generally been referred to the latter. Arum 

 silvestre I latifolium I take to be a form of Alocasia macrorrhiza 

 Schott, above. Hasskarl, Neue Schliissel (1866) .126, reduced 

 Arum silvestre II medium to Alocasia montana Schott, certainly 



