572 POACE^. 



c. Ligule 3 mm. long, rays 1-2, floral glume 2-2.5 mm. 



long 12 



c. Ligule 3—4 mm. long, rays 2-3, floral glume 3 mm. 



long „ .... 13 



C. Ligule 3—4 mm. long, rays 2-3, floral glume 3. 4.5 



mm. long 14 



e. Ligule 3.5 mm. long, rays 2-3, floral glume 4-5 mm. 



long 8 



e. Ligule 4-6 mm. long, rays 3-5, floral glume 3.5-4.5 



mm. long 15 



C. Ligule 4-6 mm. long, rays 3-5, floral glume 4-5 mm. 



long 16 



c. Ligule 5-12 mm. long, rays 2, floral glume 3-3.2 mm. 



long 17 



1. A. angustata (K. Br.) Griseb. Ledeb. Fl. Ross. 4: 390 (1853). 

 Poa angustata K. Br. Parry's 1st Voy. Suppl. [err. tyj). 187] 287 

 (1824). Glyceria angustata Fries, Mant. 3, 76 (1842). 



A smooth soft tufted grass, 20-30 cm. high. Sheaths about the 

 length of the internodes; ligule 1-5 mm. long; blades 2-3, erect, 

 flat or conduplicate, 3-6 mm. long, about 2 mm, wide. Panicle 

 often included at the base, lanceolate or ovate, 6-10 cm. long, rays 

 mostly in jiairs, the longest half the length of the panicle, flower- 

 bearing on the upper half. Spikelets linear to oval, tinged with 

 jjurple, 4-6-flowered, joint of rachilla 1 mm. long; empty glume 

 oval to ovate-lanceolate, first 1-nerved, about 1.5 mm. long, second 

 2-3 mm. long; floral glume 2.5-3.5 mm. long, very slightly hairy 

 towards the base, oval, obtuse or acute, mucronate or irregularly 

 toothed ; palea ciliolate on the keels, nearly as long as its glume. 



Hudson Strait (Digge's Island), E. Bell; Alaska, Harrington, 

 Turner; Oregon, Hoioell, collected on tide flats, L^mpqua River, 

 m 1888. 



Alaska to Oregon and Hudson's Bay, Arctic Coast. 



2. A. DiSTAXS (Host.) Rupr. Fl. Samoj. 64; Griseb. Ledeb, FL 

 Ross. 4:388 (1853). Poa distans L. Mant. 32 (1767). Glyceria 

 pumila Vasey, herb. Poa airoides Nutt. Geu. 68 (1818). Hydro- 

 cJiloa distans Hartm. Gram, Skand. 8 (1819). Glyceria distans 



