150 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Agrostis juncea Michx. 



"In aridis Carolina*. " The specimen is Sporobolus junceus (Michx.) Kunth, as 

 usually understood. 



Since Michaux's name is untenable on account of Agrostis juncea Lam. 1783, this 

 species should be called Sporobolus gracilis (Trin.) Merrill, Rhodora 4: 48. 1902 

 i Vilfa gracilis Trin.). I have examined the type in the Trinius herbarium at St. 

 Petersburg, labeled " Zimmermann misit Carolina 1836." 



Agrostis dispar Michx. 



"In Carolina ini'eriore." The specimen is Agrostis alba L. 



Agrostis aspera Michx. 



"Illinois." The specimen is Sporobolus longifolius (Torr.) Wood, and not the 

 species to which the name Sporobolus asper (Michx.) Kunth has been applied in 

 recent manuals. The latter grass has an acuminate lemma and long-acuminate palea, 

 while Michaux's description states that the flowers are muticous. 



Apparently the earliest name for the plant which has been going under the name of 

 SjH>robolus asper is Agrostis clandestina Spreng. Mant. Prim. Fl. Hal. 32. 1807, which 

 becomes Sp ojobolus clan destinus ( Spreng. ).£-. Sprengel's type has not been ex- 

 amined, but the description leaves scarcely room for doubt. The plant is described 

 as erect, and. what is particularly to the point, as having long-acuminate "corolla 

 glumes." The plant was received from Muhlenberg, who also describes it in his 

 Descriptio Graminum. Both Muhlenberg and Torrey distinguished between this 

 and Agrostis involuta Muhl. (A. aspera Michx.; A. longifolia Torr.) using among 

 other characters the shape of the lemma and palea, acuminate or awned in the first 

 and "lii use in the second. 



Agrostis lateriflora Michx. 



"in praecipitibus saxosis fluminis Misissipi ripariis Illinoensibus [sign for peren- 

 nial |." Tlie specimen is Muhlenbergia mexicana (L.) Trin. The panicles are rather 

 dense, somewhat branched, and more or less included in the sheaths at base. 



Agrostis racemosa Michx. 



"In ripis sabulosis inundatis fluminis Misissipi [sign for perennial]. Affinis A. 

 lateriflora." The specimen is Muhlenbergia racemosa (Michx.) B. S. P. Glumes 

 awned, longer than the acuminate lemma; panicle dense, more or less interrupted or 

 lobed. 



Stipa barbata Michx. 



•" In sylvis Virginiae Carolinae [sign for perennial]." The specimen is St ipaavenacea 

 L. On this sheet is also a label which doubtless goes with the next, "Stipa sericea. 

 Hab. in Carolina, Georgia maritima." 



Stipa sericea Michx. 



The specimen is Muhlenbergia capitlaris (Lam.) Trin., as described in Small's Flora. 

 Many of thesheets in Michaux's herbarium bear two labels, one with name and locality, 

 the other with a diagnosis, and usually also the name written upon it somewhere as if 

 added later. The sheet of Stipa sericea bears a label with diagnosis and name, but the 

 other label seems to have been transferred to the sheet of S. barbata, mentioned above. 



Stipa juncea Michx. 



There is no specimen with this label, but among the Avenas is a sheet marked 

 "Montagnes steril. a la hauteurs duTerres," which without doubt is the type. Itbears 

 the name Avena wniflora with the word juncea written above, and in the manuscript 

 diagnosis it is compared with An nasibericalj., as is the case in the published description 

 i iStipajunct a. The specimen is Stipa macown ii Scribn. The description merely states 

 that the flower is aristate, but the diagnosis upon the sheet states that the awn is three 

 limes as long as flower. Michaux's name can not be used on account of the earlier 



