MANUAL OF THE GRASSES OF THE UNITED STATES 



527 



W i 



Flowering culms with short blades only (rarely to 10 cm long) with few to many 

 long-leaved sterile shoots at base. 



Staminate lemmas bearing exserted awns 1. H. alpina. 



Staminate lemmas awn less or nearly so 2. H. odorata. 



Flowering culms with blades 25 to 50 cm long 3. H. occidentalis. 



1. Hieroehloe alpina (Swartz) Roem. 

 and Schult. (Fig. 1110.) Culms 10 to 

 40 cm tall, tufted, with leafy shoots at 

 base and short rhizomes; blades 1 to 

 2 mm wide, the basal ones elongate, 

 those of the culm shorter and wider; 

 panicle contracted, 3 to 4 cm long; 

 spikelets short-pediceled, 6 to 8 mm 

 long; staminate lemmas ciliate on the 

 margin, awned below the tip, the awn 

 of the second lemma 5 to 8 mm long, 

 bent, twisted below, that of the first a 

 little shorter, straight; fertile lemma 

 acute, appressed-pubescent toward 

 apex. 21 — Arctic regions, Greenland 

 to Alaska, south to Newfoundland and 

 Quebec; alpine meadows and rocky 

 slopes, high mountains, Maine, New 

 Hampshire, Vermont, and New York ; 

 Europe. 



2. Hieroehloe odorata (L.) Beauv. 

 Sweetgrass. (Fig. 1111.) Culms 30 



to 60 cm tall, with few to 

 several leafy shoots and 

 slender, creeping rhizomes; 

 blades 2 to 5 mm wide, 

 sometimes wider, those of 

 the sterile shoots elongate, 

 those of the culm mostly less 

 than 5 cm long, rarelv to 10 

 cm long; panicle pyramidal, 

 4 to 12 cm long, from some- 

 what compact to loose with 



Mil 



Figure llll.— Hieroehloe odorata. Plant, X H; spikelet, florets, and fertile floret, X 5. 



(Shear 437, Mont.) 



slender drooping branches; spikelets mostly short-pediceled, 5 mm 

 long; staminate lemmas awnless or nearly so, fertile lemma pubescent 

 toward the apex. % — Meadows, bogs, and moist places, Labrador, 



55974°— 35 34 



