EUPHORBIACEAE 



321 



Ricinus tanarius Linn., which in modern literature appears as 

 Macaranga tanarius Muell.-Arg. Spanoghe referred Tanarius 

 minor Rumph. to Mappa glabra Juss., which Pax and Hoffmann 

 retain as a distinct species, Macaranga glabra (Juss.) Pax & 

 Holfm. It is to be noted that the Amboina specimen, cited 

 above, which agrees closely with the Rumphian description and 

 with the greatly reduced figure, is by no means identical with 

 Macaranga tanarius Muell.-Arg. as currently interpreted. The 

 leaves are larger, glabrous, the petioles longer, and the stami- 

 nate inflorescences are lax, long peduncled, up to 30 cm wide, 

 and including the peduncle about 40 cm long. It is typical 

 Macaranga tanarius (Linn.) Muell.-Arg., and it seems very 

 probable that a critical revision of the group must lead to the 

 adoption of another specific name for the widely distributed 

 form that appears in herbaria under the name Macaranga 

 tanarius Muell.-Arg. Hasskarl, Neue Schlussel (1886) 65, sug- 

 gested that Tanarius minor rubra Rumph. might be the same as 

 Mappa denticulata B\ume=Macaranga denticulata Muell.-Arg., 

 but the distribution of the latter precludes the correctness of 

 this reduction. I consider it to be a color variant of Macaranga 

 tanarius Muell.-Arg. 



MACARANGA INVOLUCRATA (Roxb.) Baill. Etud. Gen. Euphorb. (1858) 

 432. 



Urtica involucrata Roxb. Hort. Beng. (1814) 47, nomen nudum, Fl. 



Ind. ed. 2, 3 (1832) 592. 

 Halecus terrestris vulgaris Rumph. Herb. Amb. 3: 197, t. 127. 

 Halecus terrestris alba Rumph. Herb. Amb. 3: 198, t. 127 bis. 

 Amboina, Batoe merah, Robinson PL Rumph. Amb. S65, 366, August 11, 

 1913, hillsides at an altitude of about 20 meters, the former with pistillate 

 flowers and immature fruits, the latter with staminate flowers. 



Halecus terrestris Rumph. was originally reduced by Linnaeus, 

 with doubt, to Croton lacciferum Linn., in Stickman Herb. Amb. 

 (1754) 14, Amoen. Acad. 4 (1759) 125, and following this reduc- 

 tion, was placed by Willdenow, Sp. PL 4 (1805) 590, under Aleu- 

 rites laccifera Willd. Miquel, Fl. Ind. Bat. I 2 (1859) 406, placed 

 it, with doubt, under Acalypha bracteata Miq. The specimens 

 cited above agree closely with the description and figure given 

 by Rumphius and are, moreover, typical Macaranga involucrata 

 Baill., a species known only from Amboina except for the plants 

 cultivated in the botanic gardens at Calcutta and Buitenzorg. 



As representing Halecus terrestris alba Rumph., I cite PI. 

 Rumph. Amb. 357 , 358, from Amahoesoe and the town of Am- 

 boina, August, 1913, both with staminate flowers. The leaves 

 are somewhat more pubescent and are less toothed than in the 



144971 21 



