1044 APPENDIX. 



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

 N. Mex. July and Aug. Related to . 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; Ieavv3 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 mm. 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: 

 ga. Cyperus Bushii Britton, n. sp. BUSH'S CYPERUS. Perennial by 

 tuber-like corms. 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 only to Mass, and Mich.; 

 add: 



8a. Eleocharis obtusa Schultes. BLUNT SPIKE-RUSH. Differs from 

 Eleocharis ovata in the pale scales of the spike and in the tubercle, which is 

 nearly or quite as broad and about one-third as high as the achene. In 

 wet soil, N. S. to Fla., Br. Col., Kans. and Texas. 



P. 170, for " Eleocharis microcarpa Torr." read " Eleocharis Torreyana 

 Boeckl." E. microcarpa Torr. proves to be different and to occur only in 

 the Gulf States and the West Indies. 



P. 171, after Eleocharis intermedia, insert: 



2ia. Eleocharis Macounii Fernald. MACOUN'S SPIKE-RUSH. Annual, 

 similar to E. intermedia, but with stouter culms, longer, narrower, elliptic- 

 lanceolate, densely flowered spikelets about i cm. long. Scales dark 

 brown; achene compressed-trigonous, obovate, light brown, shining; 

 tubercle deltoid-conic, about half as long as the achene; bristles down- 

 wardly barbed, about as long as the achene and tubercle Borders of 

 marshes, North Wakefield, Quebec. 



