334 PROCEEDINGS OP THE ACADEMY OF 



Agrostis a q u a t i c a, from Texas. No specimen of this is communicated. 



Agrostis scabriuscula is founded on a specimen of familiar A. scabra, 

 ticketed by Nuttall " Agrostis scabrata," the name a little altered. 



Agrostris albicans is founded on a slender form of A. ezarata, Trin.. 

 named by Nuttall A. Oregonensis. 



Muhlenbergia a r e n i c o 1 a is 31. gracillima, Torr., in Whippl. Rep. It is 

 Wright's No. 735, and Fendler's 968 and 969. The specimens described are 

 from Wright's collection. 



Muhlenbergia monticola is founded on Wright's specimens Nos. 731 and 

 733. which were referred by Col. Munro to M. sglvatica, Torr., var. ligulis 

 elongatisjfoliis angustis. 



Muhlenbergia pauci flora is described from a scanty, depauperate speci- 

 men of Wright's No. 732, the source concealed as usual, and the character 

 no better than would be expected. The species is, so far as we know, a new 

 one, allied to M. Willdenovii. 



Muhlenbergia T e x a n a. No specimen communicated under this name, but 

 one given by Mr. Buckley to the Academy's herbarium under the name of 

 " Agrostis barbatis, Buckl." may, from the description, be the plant intended. 

 This is a form of Sporobolus ramulosus. 



Calamagrostis Oregonensis. Mr. Buckley's ticket is thrown into a sheet 

 containing three specimens of Nuttall's, respectively ticketed by him " Calama- 

 grostis purpurascens, Columbia River," " C. gracilis, Dry Plains, Columbia," 

 and " C. pumila, Rocky Mountains." The first of these belongs to C. Langs- 

 dorffii, Trin. and C. strigosa, Bong., (between which we can draw no valid dis- 

 tinction;) the other two appear to belong to C. stricta, Trin. or C. Lapponica, 

 which are also combined by some. From Mr. Buckley's pleonastic phrase, 

 " aristisg^e et pilis corollam excedentibus," it may be supposed that he was 

 describing only the first-named specimen ; but the " pauicula 3-b-polican 

 longis" [sic] seems to include all three. (Nuttall's C. Columbiensis, ined., we 

 may remark, seems also to be C. Langsdorffii, a form with the awn inserted 

 much above the middle, and exactly C. elata, Blytt., from Norway.) 



Calamagrostis rubescens is indicated as " Oregon, Nuttall ;" but Nuttall's 

 ticket is not preserved. The specimen is an imperfect fragment. The spikelets 

 in structure perfectly accord with those of the next, of which we suppose it 

 to be a coarctate form. It would agree very well with the character of C. 

 varia, vox. purpurascens, Fl. Ross., but not with C. purpurascens, R. Br. 



Calamagrostis albicans is described from Nuttall's specimen of his " 6'. 

 pallida," this name on the ticket erased, and " albescens, Buckl." substituted, 

 and that changed to " albicans." The plant we take to be C. aleutica, Bong. 

 It is allied to some forms of C. varia, (into which C. sylvatica appears to merge,) 

 but is probably quite distinct. 



Aristida curtiseta is founded on depauperate specimens of A. purpurea. 

 such as were gathered in Sitgreaves' Expedition. 



Aristida pauciflorais^4. oligantha, Michx. 



Aristida filipendula is A. purpurea, Nutt., a form near the var. Ber- 

 landieri, Trin. The species is polymorphous. 



Bouteloua p u m i 1 a is B. polystachya, Torr., Pacific R. R. Surv. 5, (Chondro- 

 sium, Benth.) a small-flowered form of the species. Described from some of 

 Wright's No. 754. 



Bouteloua brevifolia is B. eriopoda, Torr. Described from Wright's 748 



[August, 



