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NATURAL SCIENCES OF PHILADELPHIA. 97 



plus minus obscure 5 7 nervia acuminata basi et interiore parce lanosa aut 

 glabra. 



Northern Texas. April. 



Longest branches of the panicle about an inch in length and its upper half 

 densely spiked ; spikes in twos and threes on short pedicels ; short rays with 

 spikes of flowers at and near the base; internodes on the rachis I 1 inch 

 long. 



Eragrostis diffusa, s. n. Culmo csespitoso erecto vel basi procumbente et 

 geniculato glabro ; foliis planis 6 8-policaribus et basi numerosis ; vaginis 

 glabris internodio brevioribus ore pilosis ; ligula margine longe ciliato ; pani- 

 cula diffusa ampla in long. 10 12-policaris, in latit. 6 9-policari ; radiis 

 3 4-nis aut solitariis scabris basi parce villosis 20 35-spiculatis ; spiculis 

 oblongo-ovatis acutis 9 11-floris; glumis insequalibus acutis margine albo- 

 hyalinis inferiore breviore ; valvula inferiore valde 3-nervia acuta hyaliuo- 

 membranacea ; nervis viridescentibus ; valvula superiore virido-carinata mar- 

 gine albo-hyalino persistente. 



Northern Texas. May. 



Stems from the root many, both procumbent and erect ; spikes 4 5 lines 

 long and 1 Ik broad, and about equal to the pedicels in length ; pedicels 

 appressed to the stems ; lower valve about double the size of the upper, 

 leaves 3 4 lines broad, 5 7-nerved and glabrous. 



Eragrostis curtipedicell3ta, s. n. Culmis erectis basi decumbenti- 

 bus glabris 2 3 pedalibus; vaginis glabris internodium obtegentibus aut 

 brevioribus ore pilosis ; ligula margo ; foliis plauis glabris 4 6-policaribus et 

 3 4 lin. latis ; panicula diffusa patente 10 12-policari in latit. ti 8-policari ; 

 radiis scabris solitariis alternis compositis ; axillis pilosis ; spisulis alternis 

 breviter pedicellatis 5 7-floris ; glumis subsequalibus ovatis acutis carinatis ; 

 valvula inferiore margine ciliata 3-nervia acuta ; carinis scabris ; superiore 

 apice breve hirsuta. 



Northern Texas. June. 



Pedicels generally shorter than the spikes, which are more or less appressed, 

 often touching each other on the branchlets, along which they extend from 

 the base or near the axils to the top ; spikes 2 3 lines long and about 1 line 

 wide. 



Eragrostis sessilispica, s. n. Culmo decumbente ramoso glabro 

 rigido ; vaginis glabris internodium superantibus ore pilosissimis ; foliis 

 paucis planis glabris ; panicula diffusissime 1 1 pedali in. latit. 12 15 - 

 policari ; radiis rigidis glabris compositis ; axillis pilosis ; spicis solitariis 

 alternatis sessilibus adpressis oblongo-ovatis 4 6-fioris ; glumis subsequali- 

 bus carinatis dorso scabris acuminatis ; valvula inferiore ovata longe acumi- 

 nata dorso scabriuscula ; superiore carinata arcuata ad carinam leviter ciliata 

 persistente. 



Near Austin, Texas. 



Lower palea strongly 3-nerved, equal in length or little longer than the 

 upper, which is often curved outward, leaving an open space between the 

 two ; spikes about k an inch distant, the lowest being in the axils, where 

 they (spikes) are sometimes double. 



Festuca gradient a, s. n. Radice fibrosa; culmis basi numerosis 

 geniculatis (1 1J pedali) gracilentis pubescentibus tarde glabris ; vaginis 

 striatulis pilosiusculis ; ligulis membranaceis tarde fissis ; foliis planis 3 4- 

 policaribus, 1 lin. latis parce pubescentibus ; panicula terminali gracilente 

 patente (3 4 policari) interrupta ; radiis solitariis aut 2-nis angulatis dis- 

 tantibus scabriusculis insequalibus ; spiculis ovatis 2 4-floris breviter pedi- 

 cellatis ; glumis insequalibus acuminatis lineari-lanceolatis flosculo brevioribus 



1862.] 



