Fo. 52. 



ARCTAGROSTIS LATIFOLIA (11. Br.) Griseb. in Lexleb. Fl. Ross. iv. 4.34 

 (1853); Volpudium liiti/oliiiin R. Br. Chlor. Melv. 280 (ISL'.'J). 



Plant perennial, with strong, creeping rootstock, usually purjjle in tlie inflores- 

 cence. 



Culms erect or slightly decumbent at the base, robust, smooth, leafy nearly to the 

 ]>anicli', (i to 12 inches tall. 



Lcarcs of the culm usually ">; sheaths loo.se, open above, smooth, u.sually exceed- 

 ing the interuodes; blades flat, .striate, .scabrous above, 2 to 4 lines wide, 2 to 4 inclics 

 long; ligule usually hiccrate at the obtuse apex, 2 lines long. 



InJhtrrHvencc a rather closely llowcred, contracted panicle, 2 to 5 inches long; rays 

 in semiverticillate clusters ot 3 to 5 at each of the G to 8 nodes, approsscd or slightly 

 spreading, une(|nal, an inch long or less, spikelet-bearing to the base, or the longer 

 ones .sometimes naked below. 



SpikektK 2 to 2i lines long, 1 -flowered, with a .slender capillary rudiment; em])ty 

 glumes broadly lance-oblong, acute or .subacute, thin, smooth, the tirst 1-nerved, 1 to 

 1.', lines long, the .second ^ line longer and 3-nerved; floral glume broadly lance-oblong, 

 subacute or often nun'ronulate, minutely roughened throughout, slightly pubescent on 

 the keel below, obscurely 5-nerved, 2 lines hmg; ]ialet broad and glumaccims in form 

 and texture, margins not infolded, purple like the glume and about e(|ualing it in 

 length, ituhesceiit on the 2 nerves; stamens 3, with short tilameuts and yellow anther 

 1 line long. 



Plate Lll; a, s])ikelct with lUn-et and rudiment lifted out and opened to .show 

 the stamens; b, first empty glume; c, second empty glume; (I, floral glume; e, i)alet. 



Alaska to Cireenlaiul. This species resembles Dupontia Fixhrri moje nearly 

 than any other of the same region, but that is readily distinguished by its long, golden, 

 empty glumes. 



