FESTUCEiE. 559 



<lelicately membranous, umiwned, distinctly hairy at the base. 

 Ovary glabrous. In other respects the same as Colpodunn. 



There is one, j^ossibly two, species which belong to tlie Arctic 

 regions, 



1. D. Fisheri H. \\y. 1. c. 



A smooth erect grass, 15-25 cm. high. Ligule obtuse, 1-1.5 

 mm. long; blades flat or concave, 4-10 cm. long, 3-3 mm. wide. 

 Panicle simple, shining, yellowisli purple, in- 

 terrupted, 4-7 cm. long. Spikelets 3- (rarely 

 3-) flowered, joint of rachilla 1.5 mm. long; 

 empty glumes soft, thin, membranous, first 1- 

 nerved, 5 mm. long, second 3-5-nerved, 7.5 

 mm. long; floral glume j^^^herulent, broadly -^^S;. ]^^-.~-^^?^^"/'^* 

 ovate, acute, 3-nerved, 4.5-5 mm. long; palea a (Ricbaidsou.) 

 little shorter, liyaline, 2-toothed. 



Hudson's Bay near Bering Straits, E. Bell, Wright in 1853-6; 

 Pt. Barrow, Prof. Murdoch 88 in 1882. 



Arctic coast to Hudson's Bay. 



2. D. psilosantha Ptupr. Fl. Samoj. Cisural. t. 6 (1848). 



A smooth erect grass, 20-40 cm. high. Ligule obtuse, 2-3 

 mm. long; blades concave. Panicle simple, 7-12 cm. long, rays 

 spreading. S2)ikelets 1-2-flowered, G-7 mm. long; empty glumes 

 equal, 1-nerved; floral glume a little shorter, 3-uerved. 



Behring Sea collection, Macoun 40. 



129. (258b). SCOLOCHLOA Link, Hort. Berol. 1:13G (1827). 

 Fluminia Fries, Sunim. Veg. Scand. 247 (184G). 



Spikelets 3-4-flowered, subterete in a loose or narrow ample 

 panicle, rachilla articulate between the flowers. Empty glumes 

 membranous, unequal, apex toothed, first 3-nerved, second 5- 

 nerved; floral glume rigid, not keeled, 7-nerved, toothed at the 

 apex, callus hairy. Anthers 3. Ovary hairy; stigmas subsessile. 



There are two tall perennial species found growing in water in 

 the northern temperate zone of both hemispheres. 



1. S. arundinacea (Lilj.) MacMillan, Metasp. Minn. \o\. 1:79 

 (1892). Feshica arundmacea Lilj. Sv. Fl. Ed. 2. 2:47(1792). 



