NATURAL SCIENCES OF PHILADELPHIA. 95 



It has 34 erect stems from one root, branched at the joints ; branches 

 erect, straight, with large terminal panicles, densely flowered ; leaves at the 

 joints of the culm without sheaths and stems, smooth and naked below, the 

 base of the panicle is often sheathed by the upper leaves ; whole plant pale 

 green. 



Uralepis (Tricuspis) pilosa, s. n. Culmo erecto rigido 1 2-pedali ; 

 vaginis pilosis internodium obtegentibus ; ligulis ciliatis ; foliis convolutis 

 rigidis numerosis pajce ciliatis aut tarde glabris 6 12-policaribus 1 2 lin. 

 latis ; panicula terminale basi inclusa 2 3-policari 4 6 lin. latis dense-spi- 

 cata ; radiis solitariis compositis scabris ; glumis insequalibus lanceolatis 

 acutis glabris ; valvula inferiore 3-uervia supra medium glabra basi dense 

 pilosa apice breve tricuspidata, dentibus lateralibus obtusis, dente medio 

 brevissima cuspidata. 



Northern Texas. 



Hairs of the sheath erect and numerous ; lower leaves abundant ; spikelets 

 3 1 lines long, packed closely on the short rays ; internodes of the rachis 

 4 6 lines long, scabrous. 



Pleuraphis mutica, s. n. Culmo subprostrato geniculato glabro, (l|-pe- 

 dali) ; foliis planis parum scabris 3 4-policaribus 2 3 lin. latis ; vaginis fau- 

 cibus pilosis internodio brevioribus ; ligulis membranaceis laciniatis ; spica 

 terminali 2 policari 5 6 lin. lata; glumis lato-obovatis 5 -7-nerviis apice 

 albo-hyalinis breviter laciniatis inermisbus ; valvulis subsequalibus muticia 

 hyalinis vel 1 3-nerviis obtusis laciniatis. 



Northern Texas. 



It is a much smoother plant, with fewer leaves than P. Jamesii Torr. A 

 very few of its glumes with 7 nerves have a short bristle on each side below 

 the middle, formed by the extension of the lateral nerves ; nerves green, the 

 remainder hyaline. 



Glyceria bulb os a, s. n. Culmo erecto; vaginis scabris; ligula brevis- 

 sime truncata ; foliis planis vel convolutis glabris ; radiis angulatis patenti- 

 bus compositis scabris ; spiculis 3 4-floris oblongo-ovatis sublaxifloris ; 

 glumis glabris ovatis subacutis inferiore breviore ; valvulis oblongis acutis 

 inferiore ovata obscure 7-nervia parum scabra, interiore margine ciliata. 



Columbia Woods. Nuttall. 



Glyceria leptostachya, s. n. Culmo erecto gracilenti tereti simplici 

 basi geniculato ; vaginis glabris ; ligulis 3 4 lin. longis fissis ; foliis planis 

 glabris 6 policaribus 4 lin. latis ; panicula elongata circum 12 lin. longa inter- 

 rupta ; radiis geminis scabris angulatis ; spiculis 3 4-fioris ; flosculis remo- 

 tiusculis obtusis scabris ; glumis membranaceis ; valvula inferiore distincte 

 7-nervia obovata apice obtusa scariosa, superiore obtusa apice membranacea. 



Oregon, Columbia River. Nuttall. 



Panicle about one foot long ; its branches double, and placed at intervals 

 of 1 2 inches on the stems, the longer branch about an inch in length, with 

 2 3 loose spikes of flowers on short pedicels, the shorter branch 3 4 lines 

 long, having one spike. 



Glyceria s t r i c t a, s. n. Culmo rigido erecto tereti glabro 2 3-pedali ; 

 vaginis glabris ; ligula brevissima truncata ; foliis planis vel convolutis glabris 

 6 12-policaribus, 23 lin. latis ; panicula stricta coarctata 5 6-policari 4 5 

 lin. lata ; radiis 2 3-nis erectis scabris angulatis ; spiculis 3 4-floris glabris 

 laxis ; glumis insequalibus uninerviis oblongo-ovatis acutis ; valvula inferiore 

 plus minus distincte 5-nervia oblongo acuminata glabra ; superne subacuta 

 integerrima. 



Middle Texas. 



Branches of the panicle erect and unequal, the longest naked near its base, 

 and with 34 spikes at and near its extremity ; the longest of the lowest 

 1862.] 



