New Plants of New England. 143 



kgrostis Pickermgn (mihi) culm erect, leaves flat linear, 

 panicle ovate diffuse, branches whorled erectish scabrous, 

 glumes almost equal, subbidentate, the inferior mucronate, 

 the superior acute almost smooth, the inferior palea ovate- 

 lanceolate, acute or erose, punctatulate, nerved, a little 

 pilose at the base, the superior exactly ovate obtuse nerve- 

 less, awn from the middle, twice exceeding the flower. 

 Hab. White Mountains. Named after Dr. Pickering, who 

 discovered this grass at the White Mountains. 



A. concmna (mihi) dwarfish erect, leaves filiform- 

 setaceous, panicle ovate spreading smooth, glumes unequal, 

 inferior acute mucronate somewhat scabrous at the tip, su- 

 perior acute smooth, superior palea scarcely present, inferi- 

 or smooth a little pilose at the base, with an awn from below 

 the middle, exceeding the flower. Hab. White Mountains. 

 Quite distinct from A. alpina, A. rupestris, and A. 

 canina. 



A. Torrey'i (mihi) crespitose, leaves short erect linear 

 striate, and with the sheaths smooth, panicle ovate spread- 

 ing at length divaricate scabrous, glumes very unequal 

 mucronate, the inferior one very scabrous on the keel, palea 

 much shorter than the glumes with a bent awn twice ex- 

 ceeding the flower, from about the middle of the keel. 

 Trichodium montanum Torr. ! in lift. Hab. White Moun- 

 tains, dry rocks ; clifls of the Notch. I had followed Dr. 

 Torrey, though against my own opinion, in calling this a 

 variety of A. laxiflora, but this seems to me now an incor- 

 rect view. The divaricate panicle, larger flowers, and awn, 

 here habitual, — no less than the csespitose habit, and pecu- 

 liar station, on dry rocks ^ seem to denote this grass a 

 species. The name montanam of Torrey cannot be retain- 

 ed, there being already an ylgrostis so named. 



A. NovcB A'nglicB (mihi) culm erect stout green strongly 

 striate, leaves flat broadl}^ linear very scabrous ; sheaths 

 smooth ; panicle oblong lax, branches whorled erectish 

 scabrous; glumes large green nearly equal, lanceolate, acu- 

 minate scabrous, about a line and a half long, palea nearly 

 equalling the superior glume. A stout coarse grass of 

 mountain brooks and wet rocks in the Notch of the White 

 Mountains. It is wholly different from our other New- 

 England species, A. laxiflora and A. scabra ; but the flow- 

 ers agree so nearly with those of A. altissima, a southern 

 species, that I have thought it was a variety of that plant. 

 It differs however strikingly in habit. 



