76 
pratense. 
pumila, 
aquatica. 
melicoides. 
obtusata. 
brevifolia. 
capillacea, 
| APRIANDRIA DIGYNIA. 
87. TRISETUM. Pers. ench. 1. p. 97. 
1, T. panicula subcontracta, spicis nitidis, vaginis longis 
striatis glabris, foliis superne villosis. Pers. L. c. 
Avena flavescens. Willd. sp. pl. 1. p. 449. 
Icon. Schreb. gram. t. 9. Host. gram. 3. t. 38. 
In meadows: Pensylvania and Virginia, rare, Y. July. 
v.v. 
89. AIRA. Gen. pl. 112. 
1. À. panicula parva fastigiata (pauciflora) : pedicellis bre- 
vibus, floribus muticis obtusis calyce duplo longiori- 
bus: valvulis margine membranaceis, foliis planis gla- 
bris, culmo erecto vix foliis altiore. 
On barren clay soil, near brick-yards : Pensylvania. Y. 
June. v.v. Scarcean inch high ; in close tufts. 
2. À. panicula patente semiverticillata, floribus muticis ob- 
tusis levibus calyce longioribus, foliis planis, culmo 
repente.— Willd. sp. pl. 1. p. 376. 
Yon. Host. gram. 2. t, 41. Engl. bot. 1557. 
On water sides and: a mec floating in water, diéquent. 
y. May—July. | 
3. A. panicula parva mid coarctata : gluma com- 
muni partialibusque majusculis lineari-lanceolatis mu- 
ticis: floribus basi villosis, rudimento flosculi tertii, 
foliis planis glabris, culmo erecto. Mich. fl. amer. 1. 
p. 62. 
In shady woods : Canada to Pensylvania. 2%. July. v. v. 
4. A. panicula in racemum oblongum confertiflorum co- 
arctata, floribus muticis apice compressis, glume val- 
va altera angusto-lineari acuta: altera lato-obovali ro- 
tundato-obtusissima, "ed planis, culmo gracili erecto. 
— Mich. fi. amer. 1. p. 6 
In dry fields: New fogland to Florida.. x. June, Jaly. 
v.v. 
5. À. panicula semiverticillata patente : ramis simplicius- 
culis alternifloris, floribus muticis calycem æquan- 
- tibus, glomis omnibus lanceolatis acutis, foliis planis, 
culmo stricto glabro nudiusculo. —— 
In the plains of Missouri. M. Lewis. Y. June, July. 
v. s. in Herb. Lewis, This grass is the most common 
in those plains, 
6, A. panicula capillacea effusa, flosculis muticis calyce 
