Mr. Tuckerman, on some Plants of New England. 43 
tles at the top of the inferior palea, and the awn. at its base. It 
is quite different from A. rupestris and A. canina. . 
: Tricnopium, Auctt. Amer. The following species constitute, 
I believe, all of those grasses which have in this country been 
referred to the genus Trichodium. Wishing to ascertain several 
New England plants, and finding that I possessed all the species 
mentioned in our books, I resolved to study the whole. The 
result of no little labor is given below, where it will be found, I 
hope, that the arrangement and synonymy of the species is im- 
proved, however little the characters. The genus 'Trichodium 
is wholly disallowed by Hooker, (Brit. Fl. 1,33,) and by Koch, 
(Syn. 780,) and seems, (now that more is known,) to be not 
only artificial, but even founded on an incomplete analysis. Still 
it may be said, that the two species which form the genus as 
constituted by Michaux, are distinguished by a habit almost as 
striking as that of A. Spica venti, which is separated from 
Agrostis by Trinius and Lindley ; and by characters which seem, 
pethaps, to vary less in the original species, than in those other 
forms which have since been connected with them. : 
_ A. vaxrerora, (Richards.): culmis erectiusculis basi purpuras- 
centibus striatis glabris, foliis linearibus inferioribus angustioribus 
involutis breviusculis suberectis striatis utrinque scabris vaginis 
scabriusculis, panicula tenuissime capillari laxissima ramis vertl- 
cillatis scabris summitatibus pauciter floridis, glumis inaequalibus 
vix lineam longis lanceolatis inferioris, carina scabra superionisqne 
versus apicem palea semilineam longa acuta glabra. E, T.—Tr- 
chodium laxiflorum, Micha, Fl. 1,142, Muhi. Gram. p. 60, Torr. 
Fi. 1, 83, Darlingt. Cest. p. 54. Agrostis laxiflora, Richards. 
App. Frankl. Narr. p.731. A. Michauaié, Trin. A. Michaucw, 
var. laxiflora, Gray, Gram. §& Cyp- (cit. Darlingt.)—3. mon- ~ 
tana, (mihi) : caespitosa, panicula ovata patente demumque di- 
Varieata, palea arista tortili exserta e medio dors! proveniente 
predita—T'richodium montanum, Torr. (fide ips. ) Torr. Fl. 
1, 84, | 
~~ Hab. («.) Dried up swamps and pastures. Plymouth, nfl? 
wich, Cambridge, Burlington, Vt. (8.) Dry rocky precipices © 
the Notch of the White Mountains. The last seems almost a 
distinct species, and differs in the size at least of its flowers 
from «. It is not, however, now considered distinct by Dr. 
Torrey, 
