84 The Ottawa Naturalist. [June 



Arctqphila chrysantha. (Figs. 6 and 7.) 



Rhizome stoloniferous, somewhat robust : culm glabrous, 

 about 30 cm. in height, the upper internodes very little longer than 

 the leaf-sheaths, the basal shorter : leaves glabrous, deep green, 

 the sheaths closed from above the middle : ligule almost entire : 

 leaf-blade flat, relatively narrow in the upper leaves, much longer 

 than the internodes, erect : panicle rich-flowered, nodding, some- 

 what contracted, the slender rays three to five in the basal verti- 

 cils : spikelets numerous, small, yellowish-brown, shining, short- 

 peduncled to nearly sessile, two- to three-flowered: empty glumes 

 variable in length, both five-nerved in fully developed spikelets, 

 broad and slightly acute : flowering glume relatively broad with 

 the acute apex entire or minutely erose : rhacheola, stamens and 

 pistil as in the other species. 



Identified as CoLpodium fulvum, from which it, however, is 

 very distinct by the characters mentioned above. Collected by J. 

 B. Flett in swamps near sea-shore, 16 miles west of Nome City, 

 Alaska; in flower Aug., 1900. 



These species of Arctophila may naturally be classified in two 

 sections : 



I. MacrostachycE. 



Spikelets, when fully developed, five- to seven-flowered, the 

 base acute during anthesis. 



A. fulva, A. remotiflora, and A. pendulina. 



I I . Brachystachyce. 



Spikelets two- to four-flowered, the base obtuse during 

 anthesis, 



A. bn'soides, A. chrysantha , A. deflexa, A. gracilis, A. lot i flora, 

 A. mucronata, A. poecilantha, A. scleroclada, A. siinilis and A. 

 trichopoda. 



Brookland, D.C., April, 1902. 



