84 Rhodora [May 



He divides the genus into three sections; those species having "per- 

 ianthiis bidentatis, aristis (setis) abbreviatis" form his section "b," to 

 wiiich he refers Kaclcria villo.w and K. phleoides- Pers. The third 

 section, which is estabUshed with a query, has the flowering ghunes 

 awnless. Here he includes Eatonia obtusata (Mx.) A. Gray and E. peyin- 

 fujlvanica (l).C.) A. Gray, with the remark that the latter is similar 

 to TriseUim pahtstre. It is clear that Trinius recognized the close 

 relationship of Eatonia and Koekria with Trisetum by uniting these 

 genera with it, although he apj)arently excluded them a few years later 

 when he published (Mem. Acad. St. Petersb. VI. 4": 1()-1I, lS;i(i) a 

 more complete diagnosis of the genus, evidently the result of much 

 careful study. He does not appear to have made any referenc;e to 

 (jraphcphorum virliroideum, at least I have failed to discover any, 

 but this grass woiild certainly fall under Trisetum as above charac- 

 terized. 



(iR.\PHEFHOKL'M: — In a memoir upon some new genera of Gramineae 

 published in 1810 (Nov. Bull. Soc. Philom. de Paris, II. 2: 189) Des- 

 vaux established the genus Graphephomm upon Michaux's Aira 

 melicoidcs, published in 1S()3 (Flor. Bor. Am. 1: 62). Michaux de- 

 scribes his plant as follows: 



"A. erecta, glabra, planifolia: panicula parvula, subracematim 

 coarctata: gluma communi partialibusque majusculis, lineari-lanceo- 

 latis, muticis; his basi villis cinctis: minutissimo tertii flosculi nidi- 

 mento pedicellato. 



"Obs. Ex secundi flosculi basi nascitur pedicellus longiusculus, 

 villosus, vix perceptibili floris rudimento terminatus. 



"Hab. (\inada." 



Desvaux evidently examined specimens of the grass, probably 

 Michaux's, for he adds some characters in his diagnosis not noted by 

 the author of the species. 



" Graphrphomm. (iluma biflora valvulae acutac integerriniae; 

 gluraellae inclusae; valvulae bifidae, appendix interflorus, elongatus, 

 jiilosus, pilis secundis. S])iculae paniculatae. 



" Graphephorum melicoideum Desv. 



"Aira melicoides Michx. 



"L'appendice qui characterise ce genre, ne ressemble point a une 

 fleur avort^^'e, c'est un corps tout particulier." 



He does not compare Graphephorum with Trisetum, but .separates 

 it from Aira by the peculiar character of the prolongation of the 



