92 



PROCEEDINGS OF THE ACADEMY OF 



Calamagrostis Oregonensis. s. n. Culmo geniculate) erecto H 2 

 pedali glabro ; vaginis glabris ; ligula elongata membranacea ; foliis planis 

 yel convolutis glabris 4 8-policaribus 13 lin. latis ; panicula contracta sub- 

 interrupta 3 5-polieari 'longis ; radiis 5 7-nis compositis angulatis scabris ; 

 glumis inaequalibus glabriusculis acutis, inferiore sub 3-nervia flosculo pa- 

 rum longiore, superiore valvulam suba?quante ; valvulis parum inaequali- 

 bus, inferiore bidentata dorso aristata ; aristisque et pilis corollam exceden- 

 tibus. 



Columbia River. Nuttall. 



Internodes oh the panicle about an inch long ; glumes tinged with purple. 



Calamagrostis rubescens, s. n. Culmo glabro (2 3 pedali) erecto : 

 vaginis glabris; ligula elongata (3 4 lin.) membranacea apice fissa : foliis 

 planis parce pubescentibus ; panicula coarctata 3 4-policari 6 lin. lata : 

 radiis fasciculatis compositis confertissiinis multifloris ; glumis paulo inaequali- 

 bus lanceolatis acuminatis glabris aut parce scabris rubescentibus ; valvulis 

 glabriusculis integerrimis acutis ; arista torta paulo infra medium vel ad 

 basin inserta et valvulam subaequante ; pilis numerosis valvula i \ brevi- 

 oribus. 



Oregon. Nuttall. 



Radiis and blanches of the panicle terete and glabrous ; branches erect, 

 rigid, about an inch in length, with numerous pedicels, more or less bent and 

 densely flowered ; internodes of the rachis \ 1 inch in length. 



Calamagrostis albicans, s. n. Culmo erecto glabro supra scabro 3 i 

 pedali ; vaginis glabris ; ligula membranacea apice integra obtusa tarde parum 

 fissa 12 lin. longa ; foliis planis marginibus scabris 1 1J pedalibus ; pani- 

 cula 6 9 lin. longa subcoarctata vel patente ; radiis 5-nis basi ramosis et 

 supra compositis angulatis scabris ; glumis inaequalibus lanceolatis acutis, 

 inferiore valvulam superante, superiore corollam aequante ; valvulis aequali- 

 bus, inferiore glabra apice bifida arista dorsali parum longiore ; pilis flosculo 

 2 brevioribus ; rudimento brevissimo. 



Oregon, Columbia Plains. Nuttall. 



Internodes of the panicle \ 1 inch long ; rays fasciculated, erect and 

 branching about a line from the base, and also above ; sides of the glumes 

 membranaceous and white ; the palea are also more or less hyaline and white ; 

 bristle often near the base, or about the middle of the lower valve, rarely near 

 the top ; it is \ shorter than the valve. 



Aristida c u r t i s e t a, s. n. Tota glabra, culmo simplici glabro erecto 

 6 8-policari ; vaginis internodio brevioribus ; ligulis pauci pilosis ; foliis 

 radicalibus plurimis convolutis filiformibus ; panicula stricta pain-Mora ; ra- 

 diis geminis inaequalibus unifloris ; glumis aequalibus aut inaequalibus cari- 

 natis paleam sequantibus vel superantibus ; palea inferiore valde 3-nervia : 

 setis brevibus inaequalibus. 



Northern Texas. May. 



Bristles 4 8 lines long, 2 3 parted and sometimes undivided : leaves of 

 the stem 2 inches long; radical leaves 3 4 inches in length ; joints of the 

 stem obscure. 



Aristida p a u c i f 1 o r a, s. n. Radice fibrosa ; culmo rigido erecto 1.} 2 

 pedali ad nodos ramoso et suhgeniculato ; foliis radicalibus convolutis fila- 

 mentis culmum sequantibus vel superantibus glabriusculis ; ligulis nullis aut 

 brevissime pilosis ; panicula paucittora glumis inaequalibus apice setaceis 

 ftosculum superantibus scabriusculis ; flosculo glabro compresso vel angulato 

 apice non torto ; aristis 3 inaequalibus 1 2 policaribus ; radiis unifloris 

 solitariis 2 4 lin. longis. 



Northern Texas. 



It has abortive stems and leaves at the joints, which are often not sheathed 

 at the base ; upper leaves mixed with the panicle, which has 5 8 solitary 



[Feb. 



