Tor.. III.] 



APPENDIX. 



503 



[Vol. I: p. 160.] 4a. Agrostis rupestris 

 AUioni. Rock Bent-grass. (Fig. 365a. ) 



Agroslis rupeslris WWom, Fl. Pedem. 2:237. 1785. 

 Culms tufted, 6' or less tall, slender, erect, or 

 decumbcut at the base, smooth and glabrous. 

 Sheaths longer than theinteruodes; ligule about 

 ]/z" long; leaves smooth and glabrous, those on 

 the culm 1' or less long, the basal leaves from 

 one-third to one-half as long as the culms; 

 panicle contracted, i' or less long, its axis and 

 branches smooth, the latter erect or nearly so, 

 spikelet-beariug above the middle; spikclets 

 about i" long; empty scales about equal, i- 

 nerved, acute, usually purple, hispidulous on 

 the keel; flowering scale shorter, hyaline, den- 

 ticulate at the obtuse or truncate apex, bearing 

 about the middle a dorsal scabrous awn a little 

 over 1" long; palet wanting. 



Labrador and the high mountains of Nevada. 

 Also in Europe. Summer. 



[Vol. I: p. 174.] 2a. Danthonia glabra 



Nash. Smooth Wild Oat-grass. (Fig. 398a.) 



Danthonia glabra Nash, Bull. Terr. Club, 24: 43. 1897. 



Glabrous. Culms erect, tufted, i6'-2S' tall, slightly 

 roughened just below the panicle and puberulent below 

 the brown nodes; sheaths usually shorter than the in- 

 ternodes; ligule densely ciliate with long silky hairs; 

 leaves smooth excepting at the apex, i"-2" wide, erect, 

 those on the sterile shoots 6' or more long, the culm 

 leaves 2^-4' long; panicle 2^-3' long, contracted; spike- 

 lets, including awns, 9"-io" long, 5-io-flowercd, on 

 hispidulous appressed pedicels; empty scales acumi- 

 nate; flowering scales 2 ^''-3" long to the base of the 

 teeth, pilose on the margins below and sometimes spar- 

 ingly so on the midnerve at the base, the remainder of 

 the scale glabrous, teeth, including the awns, i"-!,^" 

 long, the central awn 4;^"-6" long, more or less 

 spreading. 



In swamps, southern New Jersey to Georgia. May-July. 



Tricuspis albescens Munro; A. Gray, Proc. Phila. 



Acad. Nat. Sci. 1862: 333. Name only. 1S63. 

 Triodia albescens Vasey, Bull. U. S. Dept. Agric. Div. 



Bot. 12: Part 2, 33. i8gi. 

 Siegtingia albescens Kuntze; L. H. Dewey, Contr. U. 



S. Nat. Herb. 2: 538. 1S94. 



Culms tufted, erect, smooth and glabrous, i2'-2o' 

 tall, the sterile shoots one half as long as the culm 

 or more. Sheaths shorter than the iuternodes, 

 smooth; ligule a ring of short hairs; leaves smooth 

 beneath, roughish above, acumiuate, 2)^'-ii' long, 

 \"-2" wide; panicle dense and contracted, while, 

 ^li's' long, y*'-)i' broad, its branches erect or 

 ascending, 1' or less long; spikelets about 7-11- 

 flowered, 2"-2\i" long, the empty scales white, 

 i-nerved, about equal; flowering scales about 

 lYz" long, 3-nerved, the lateral nerves vanishing be- 

 low the apex, all the nerves glabrous, the midnerve 

 excurrent in a short scabrous point, denticulate 

 and irregularly and obscurely lobed at the truncate 

 ape.^, short-pilose on the callus. 



Prairies, Kansas to Texas. Aug.-Sept. 



Sieglingia albescens (Vasey) Kmitze. 

 Sieglingia. (Fig. 422a.) 



White 



