1902] Holm On the Genus Arctophila, Rupr. 77 



ON THE GENUS ARCTOPHILA, RUPR. 

 By Theo. Holm. 

 (With one plate.) 



The old genus Colpodium of Trinius was founded upon two 

 species : monandrimi and Steveni, which by Trinius himself were 

 considered as " species facie dissimiles ", and they are indeed so 

 unlike that Robert Brown a few years later segregated the former as 

 Phippsia algida, R.Br., and retained the latter only as a Colpodium. 

 To the latter genus was furthermore referred C. latifoLium R Br., 

 although Robert Brown was not certain about the real affinity of 

 this species with those of Trinius and especially not with C. Steveni 

 and compressiim. At present Robert Brown's species latifolium is 

 generally placed under Grisebach's genus Arctagrostis : A Laiijolia 

 (R. Br.) Griseb. 



While Colpodium of Trinius was adopted by Grisebach with 

 the omission of C. 7nonandruni [Phippsia], the genus was never- 

 theless augmented with certain species, placed as a section 

 ^'^ Arctophila'' in contrast to C. Steveni and its natural allies, 

 representing the section " Eucolpodium.'' By including the species 

 of Arctophila, Rupr,, the genus ColpodiMni became actually an 

 aggregate of incongruities, as it had been before with Phippsia 

 and Arctagrostis. By Bentham the genus was finally restricted to 

 the section Eucolpodium, while Arctophila became transfered to 

 Graphephorum Dest;. , next to G/yctfr/a R. Br. ; another disposition 

 was made by Hackel, who followed Grisebach by placing them 

 both [Eucolpodium and Arctophila) as sections of the original genus 

 Colpodiu?n,a.nd characterized as having the "spikelets one to two- 

 flowered etc." This same classification is, also, followed by Beal 

 in his lately published monograph ot North American Grasses, 

 with the same erroneous characterization, erroneous, because it 

 was originally intended for Colpodium alone in the sense of 

 Trinius. 



Three species are enumerated by Beal as representatives of 

 the ^Q.nws[Colpodiuni)\n North America : C. fulvum. (Trin.) Griseb., 

 C. pendulinum (Laestad.) Griseb., and C. mucronatu7n (Hack.) 

 Beal Considering the fact that Colpodium in the sense of Trinius 

 was originally intended for both C. Steveni and Phippsia algida, 



