88 



RUMPHIUS'S HERBARIUM AMBOINENSE 



Andropogon sorghum Brot., subsp. sativus Hack. var. saccha- 

 ratus (L.) Hack. Following other authors, it is considered 

 under the generic name Sorghum, while Hitchcock proposes to 

 recognize the genus Holcus for the sorghums, and retains the 

 Linnean names, Holcus sorghum, H. saccharatus, etc. ; Holcus 

 of authors, as typified by the European Holcus lanatus Linn., 

 becomes Nothoholcus. 



ANDROPOGON AMBOINICUS (Linn.) comb. nov. 



Poa amboinica Linn. Mant. 2 (1771) 557 (type!). 

 Poa amboinensis Murr. in Linn. Syst. ed. 13 (1774) 98 (type!). 

 Eragrostis amboinensis Trin. ex Steud. Nomencl. ed. 2, 1 (1840) 562 

 (type!). 



Phoenix amboinica montana Rumph. Herb. Amb. 6: 19, t. 7, f. 3. 



Amboina, Soja road, on grassy hillsides, altitude 300 meters, Robinson 

 PI. Rumph. Amb. US, August 1, 1913. 



The specimen agrees perfectly with the description given by 

 Rumphius, and sufficiently well with the figure, which is rather 

 crude. The species has not been previously recognized, and Poa 

 amboinica Linn.=Poa amboinensis Murr. is reduced in Index 

 Kewensis to Eragrostis amboinensis Trin., this being merely a 

 transfer of the specific name by Steudel. Poa amboinica Linn, 

 is based wholly on Rumphius's description and figure from which 

 the species must be interpreted. 



Andropogon amboinicus (Linn.) Merr., if interpreted in a 

 broad sense, is identical with Andropogon serratus Thunb. ; and, 

 if Hackel be followed in considering Thunberg's species as in- 

 cluding several varieties, the Linnean specific name will replace 

 Thunberg's. However, Andropogon amboinicus is apparently 

 the form mentioned by Hackel under Andropogon serratus 

 Thunb. var. genuinus Hack, subvar. major Hack, in DC. Monog. 

 Phan. 6 (1889) 521. The Amboina specimen differs radically 

 from typical Andropogon serratus Thunb. in its long-pilose 

 sheaths and larger spikelets and probably should be considered 

 specifically distinct. 



ANDROPOGON CITRATUS DC. Cat. Hort. Monsp. (1813) 78; Nees in 

 Allgem. Gartenzeit. 3 (1835) 266. 

 Cymbopogon citratus Stapf in Kew Bull. (1906) 322, 357, plate. 

 Schoenanthemum ambolnicum Rumph. Herb. Amb. 5: 181, t. 72, f. 2. 



This species is not represented in our Amboina collections. 

 For a very full discussion of it the student is referred to Doctor 

 Stapf 's article.* Schoenanthemum amboinicum has very gen- 

 erally been confused with Andropogon schoenanthus Linn.; in 



* The oil-grasses of India and Ceylon. Kew Bull. (1906) 297-364. 



