I064 APPENDIX. 



hairy above; spike 1-1.5 dm. long; spikelets 2 at each node, 4-5-flowered; 

 empty scales diverging, thickened, coriaceous and somewhat curved at 

 the base, usually rough-hairy, about 1.5 cm. long, bearing an awn oi 

 about the same length; flowering scales 8-10 mm. long, hirsute, termi- 

 nated by a straight awn 2.5-3 cm - long. In moist woods and thickets, 

 N. C. to Fla., west to Ark. and Mo. July and Aug. Intermediate be- 

 tween E. hirsutiglumis and E. Canadensis; separated from the former by 

 its stouter spike and longer scales and awns, and from the latter by the 

 thickened and hirsute empty scales. 



3b. Elymus glabriflorus (Vasey) Scribn. & Ball. Smooth-flowered 

 Wild Rye. Culms erect, stout, 5-10 dm. tall; sheaths loose, smooth or 

 rough-hairy; leaves numerous, 1.5-3 dm. long, 6-10 mm. wide, erect or as- 

 cending, somewhat roughened on the lower surface, rough and sometimes 

 a little hairy on the upper surface; spike stout, erect or nodding, 1-1.5 dm. 

 long, sometimes glaucous; spikelets 2 or 3 at each node, 3-5-flowered; 

 empty scales thickened, strongly 3-5-nerved, hispidulous on the nerves, 

 II— 15 mm. long, bearing an awn about 2 cm. long; flowering scales 9-12 

 mm. long, minutely hispidulous, terminated by a straight slender awn 2-3 

 cm. long. In low rich woods or thickets, Penn. to Tenn. and Ga., west to 

 N. Mex. July and Aug. Related to E. hirsutiglumis, but distinguished by 

 its merely hispidulous, not hirsute, flowering scales. 



In Elymus Canadensis L., line 6, omit the words " nearly smooth to "; 

 add: 



4a. Elymus brachystachys Scribn. & Ball. Short-spiked Wild Rye. 

 Culms stout, 3-10 dm. tall, erect; sheaths glabrous; leaves 1-2 dm. long, 

 6-10 mm. wide, ascending, smooth or a little rough below, finely hispidu- 

 lous above; spike rather dense, 8-16 cm. long, much exserted; spikelets 2 

 at each node, 3-5-flowered; empty scales hispidulous, 8-10 mm. long, 

 bearing a straight awn 1.5-2.5 cm. long; flowering scales smooth or mi- 

 nutely hispidulous, 11-13 mm. long, 5-nerved, the nerves next the mid- 

 nerve often shortly excurrent, terminated by a straight or sometimes 

 diverging awn 2-4 cm. long. In moist open or shaded places, Mich, and 

 S. Dak. to N. Mex. and Tex. Also in Mexico. June-Aug. Distinguished 

 from E. Canadensis by its smaller size and merely hispidulous, not hirsute, 

 flowering scales. 



P. 161, Cyperus microdontus, read for range, Va. and N. C, and add: 

 5a. Cyperus Gatesii Torr. Gates's Cyperus. Annual; bright green. 

 Leaves 0.5-4 rnm. wide; scapes tufted, 1-4 dm. high, often longer than the 

 leaves; bracts of the involucre surpassing the 3-8-rayed umbel; rays of the 

 umbel 1-5 cm. long; spikelets linear to linear-lanceolate, 6-15 mm. long, 

 acute; scales oblong-lanceolate, shining, striate; achene oblong, abruptly 

 apiculate. In moist soil, Va. to Fla. and Tex. May-Sept. Differs from 

 C. microdontus in the oblong, not ovate, scales, the 3-8-rayed, not capitate, 

 umbel, and the abruptly apiculate achene. 



P. 162. Cyperus Schweinitzii, strike Kans. from range and add: 

 9a. Cyperus Btishii Britton. Bush's Cyperus. Perennial by tuber- 

 like conns. Leaves 3-4 mm. wide, smooth; scapes smooth, 3-6 dm. high, 

 longer than the leaves; longer involucral bracts much exceeding the 

 umbel; umbel capitate, or with 1-5 rays; spikelets loosely capitate, flat, 

 linear, acute, 8-16 mm. long; scales firm, shining, oblong, mucronate, 

 strongly about n-nerved; achene oblong, 3-angled, nearly twice as long 

 as thick, apiculate, two-thirds as long as the scale. In sandy soil, Minn, 

 to Wis., Neb. and the Ind. Terr. July-Sept. Type collected by B. F, 

 Bush at Arkansas, Ind. Terr. 



P. 169, Eleocharis ovata, ranges southward cnly to Mass. and Mich.; 

 add: 



