MANUAL OF THE GRASSES OF THE UNITED STATES 



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or rarely very minutely roughened, ulous; glumes very scabrous on the 

 mostly 2.5 to 3 mm. long. % - green part, the second thin, acute, 



Figure 381. — Sphenopholis intermedia. Panicle, X 1; 

 glumes and floret, X 10. (Clark 1785, Ind.) 



Damp or rocky woods, slopes, and 

 moist places, Newfoundland to Brit- 

 ish Columbia, south to Florida and 

 Arizona ; Tanana Hot Springs, Alaska. 

 Delicate plants with small panicles 

 resembling S. nitida may be dis- 

 tinguished by the very narrow first 

 glume, the acute to subacute second 

 glume and lemmas, and usually by 

 the glabrous foliage. Plants with 

 rather dense panicles resembling S. 

 obtusata may be distinguished by the 

 thinner, less rounded, more com- 

 pressed second glume. This is the 

 species called Sphenopholis pollens 

 (Spreng.) Scribn. in some manuals. 

 Bieler's description of Aim pollens 

 shows that Scribner misapplied the 

 name (see no. 6). 



3. Sphenopholis longiflora (Vasey) 

 Hitchc. (Fig. 382.) Culms relatively 

 stout, erect from a decumbent base, 

 40 to 70 cm. tall; lower sheaths pu- 

 berulent, the others glabrous; blades 

 thin, flat, scaberulous, 5 to 18 cm. 

 long, 3 to 8 mm. wide; panicle many- 

 flowered, rather loose, slightly nod- 

 ding, 10 to 18 cm. long; spikelets 

 mostly 2-flowered, the rachilla hispid- 



Figure 382. — Sphenopholis longiflora. Panicle, X 1; 

 glumes and floret, X 10. (Nealley, Tex.) 



about 3.5 mm. long; lemmas smooth, 

 scaberulous toward the tip, the first 

 about 4 mm. long. % — Wooded 

 banks, Arkansas and Texas. Differing 

 from S. intermedia in the larger spike- 

 lets, broader blades, and more taper- 

 ing lemmas. 



4. Sphenopholis nitida (Bieler) 

 Scribn. (Fig. 383.) Culms tufted, 

 leafy at base, slender, shining, 30 to 

 70 cm. tall; sheaths and blades mostly 

 softly pubescent, occasionally gla- 

 brous, the blades 2 to 5 mm. wide, 3 

 to 10 cm. long, the basal sometimes 

 longer; panicle rather few-flowered, 

 mostly 8 to 12 cm. long, the filiform 

 branches distant, ascending, spread- 

 ing in anthesis; spikelets 3 to 3.5 mm. 

 long; glumes about equal in length, 

 usually nearly as long as the first flo- 

 ret, the first glume broader than in 

 the other species, the second broadly 

 rounded at summit, at least the sec- 

 ond lemma scabrous-papillose. % 

 — Dry or rocky woods, Massachusetts 

 to North Dakota, south to Florida 

 and Texas. 



5. Sphenopholis filiformis (Chapm. ) 

 Scribn. (Fig. 384.) Culms erect, very 



