GRAM^WEAE, IJI 



sparingly pilose at the throat; leaves 5-17.5 cm. long, 2-6 mm. wide, flat, smooth be- 

 neath, scabrous above; panicle 5-15 cm. in length, the branches spreading or ascend- 

 ing, 2.5-5 cm - l n g; spikelets 8-35-flowered, 5-16 mm. long, about 3 mm. wide, very 

 flat; empty scales acute, the first slightly shorter than the second; flowering scales 

 obtuse, 2-2.5 mm. long, the lateral nerves prominent. In waste and cultivated 

 places nearly throughout the U. S., and in Ont. Naturalized from Europe. Un- 

 pleasantly scented, handsome. Aug.-Sept. 



7. Eragrostis sessilispica Buckley. PRAIRIE ERAGROSTIS. (I. F. f. 434.) 

 Culms 2-10.5 dm. tall, erect, simple. Sheaths crowded at the base of the culm, 

 pilose at the summit; leaves 5-15 cm. long, 1.5-3 mm. wide, rough above, glabrous 

 or sparingly pilose beneath; panicle 2-4 dm. in length, the branches stout, rigid, 

 widely diverging; spikelets scattered, closely sessile, appressed, 5-i2-flowered, 8-14 

 mm. long; empty scales about equal in length, acute; flowering scales very acute, 

 about 4 mm. long, the lateral nerves very prominent. Prairies, Kans. to Tex. 

 Aug.-Sept. 



8. Eragrostis curtipedicellata Buckley. SHORT - STALKED ERAGROSTIS. 

 (I. F. f. 435.) Culms 1.5-9 dm. tall, erect, rigid, simple. Sheaths overlapping, 

 pilose at the summit; leaves 5-20 cm. long, 2-4 mm. wide, smooth beneath, sca- 

 brous above; panicle 1-3 dm. in length, the branches widely spreading, 3.75-11.25 

 cm. long; spikelets 5-12-flowered, 3-6 mm. long, on pedicels of less than their own 

 length ; scales acute, the empty ones somewhat unequal, the flowering ones about 

 1.75 mm. long, scabrous on the midnerve, their lateral nerves prominent. Prairies, 

 Kans. to Tex. Aug.-Sept. 



9. Eragrostis pectinacea (Michx.) Steud. PURPLE ERAGROSTIS. (I. F. f. 

 436.) Culms 3-7.5 dm. tall, erect or ascending, rigid, simple. Sheaths overlap- 

 ping, glabrous or villous, the upper one often enclosing the base of the panicle ; 

 leaves 1.25-3 dm. long, 4-8 mm. wide, smooth beneath, scabrous above and spar- 

 ingly villous at the base; panicle 1.5-6 dm. in length, purple or purplish, the 

 branches 7.5-25 cm. long, strongly bearded in the axils, widely spreading or the 

 lower often reflexed; spikelets 5 15-flowered, 38 mm. long, on pedicels of at least 

 their own length; scales acute, the empty ones about equal, the flowering ones about 

 1.75 mm. long, their lateral nerves very prominent. In dry soil, N. H. to 111. and 

 S. Dak., south to Fla. and Tex. Aug.-Sept. 



10. Eragrostis refracta (Muhl.) Scribn. MEADOW ERAGROSTIS. (I. F. f. 

 437.) Culms 3-9 dm. tall, erect, slender, simple. Sheaths overlapping, smooth 

 and glabrous; leaves 1.25-3 dm. l n g 2 ~4 mm - w ide, smooth beneath, rough above, 

 and villous toward the base; panicle 2-5 dm. long; branches slender, 1-2.5 dm. l n g 

 at length widely spreading, the axils often bearded; spikelets 6-25 -flowered, 5-12 

 mm. long, longer than their pedicels; empty scales acute, the first somewhat 

 shorter than the second; flowering scales very acute, 1.5-2 mm. long, the lat- 

 eral nerves prominent. In moist soil, Del. and Md. to Fla., west to Tex. Aug.- 

 Sept. 



11. Eragrostis trichodes (Nutt.) Nash. HAIR-LIKE ERAGROSTIS. (I. F. f. 

 438.) Culms 612 dm. tall, erect, simple. Sheaths overlapping, pilose at the 

 throat; leaves 1.5-6.5 dm. long, 2-4 mm. wide, smooth beneath, slightly scabrous- 

 above, attenuate into a long slender tip ; panicle 2.25-6.5 dm. in length, narrow and 

 elongated, the branches erect or ascending, capillary, subdividing, somewhat flex- 

 uous, 7.5-17.5 cm. long ; lower axils sometimes bearded; spikelets usually pale, 

 3-iO-flowered, 5-9 mm. long; lower scales very acute, about equal; flowering scales 

 acute, the lower ones 2.5-3 mm - l n g' their lateral nerves manifest. In dry sandy 

 soil, Ohio and 111. to Neb., south to Ark. and Tex. Aug.-Sept. 



12. Eragrostis secundiflora Presl. CLUSTERED ERAGROSTIS. (I. F. f. 

 439.) Smooth and glabrous. Culms 1.5-9 dm. tall, erect simple; leaves 5-30 

 cm. long, 2-4 mm. wide; panicle 3.75-15 cm. in length, the branches 1.25-3.75 

 cm. long, erect or ascending ; spikelets crowded or clustered, sessile or nearly so, 

 strongly flattened, 8-4O-flowered, 6-20 mm. long, 2-5 mm. wide; lower scales 

 acute, about equal; flowering scales 3-3.5 mm. long, acute, usually purple-bord- 

 ered, the lateral nerves prominent. In dry soil, Kans. and Mo. , south to Tex. and 

 La. Aug.-Sept. 



13. Eragrostis hypnoides (Lam.) B.S.P. CREEPING ERAGROSTIS. (I. F. f. 

 440.) Culms 2.5-45 cm. long, extensively creeping, branched, the branches erect 



