82 



MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



Figure 115.— Distribution of 

 Puccinellia lemmoni. 



Dakota; Washington, south to New Mexico and California (fig. 119); 

 introduced from Eurasia. The more slen- 

 der specimens are the form described as 

 P. distans var. tenuis (Uechtritz) Fern, and 

 Weath. 



8. Puccinellia nuttalliana (Schult.) 



Hitchc. NUTTALL ALKALI-GRASS. (Fig. 



120.) Perennial; 



culms usually erect, 



slender, rather stiff 



and firm at base, 



mostly 30 to 60 cm 



rarely to 1 m tall; 



blades 1 to 3 mm 



wide, flat, or becom- 

 ing involute ; panicle 

 pyramidal, open, mostly 10 to 20 cm long, 

 the distant scabrous branches fascicled, 

 spreading, naked below, as much as 10 cm 

 long; spikelets 3- to 6-flowered, 4 to 7 mm 

 long, the florets rather distant, the rachilla 

 often exposed; pedicels scabrous; glumes 

 1.5 and 2 mm long; 

 lemmas 2 to 3 mm 

 long, rather nar- 

 row, somewhat 

 narrowed into an 

 obtuse apex; an- 

 thers about 0.7 mm long. Qi (P. airoides 

 Wats, and Coult.) — Moist, usually alkaline 

 soil, Minnesota to British Columbia, south to 

 Kansas, New Mexico, and California; intro- 

 duced in Maine and Vermont (fig. 121). The 

 form with lemmas 2.5 to 3 mm long has been 

 called P. cusickii 

 Weatherby. — Alberta 

 to Wyoming and Ore- 

 gon. 



9. Puccinellia pumila 

 (Vasey) Hitchc. (Fig. 

 122.) Perennial; 

 culms lax, erect or 

 ascending from a de- 

 cumbent base, 10 to 30 cm tall; blades rather 

 soft, mostly flat, 1 to 2 mm wide; panicle 

 pyramidal, open, mostly 5 to 10 cm long, the 

 lower branches naked below, usually finally 

 spreading or even reflexed; spikelets 4- to 

 6-flowered; glumes 1.5 and 2.5 mm long; 

 lemmas 3 to 4 mm long, rather broad, nar- 

 rowed toward the obtuse nearly entire apex, 

 obscurely pubescent near base or glabrous; anthers 0.8 to 1 mm 



Figure 116.— Puccinellia maritima. 

 Plant, X 1; floret, X 10. (Fernald 

 and Long 20051, Nova Scotia.) 



Figure 117.— Distribution of 

 Puccinellia maritima. 



Figure 118.— Puccinellia distans. 

 Panicle, X Vl, floret, X 10. 

 (Schuette, Wis.) 



