MH'IIKJAN ACAIH:.MY OF SCJENCB. I'.rw 



Elymus Canadensis, L. (E. Canadvnisis var. (jlaucifolius (Willd.) Torr.) 

 Rather scarce. This glaucous plant is the Liunaean species. Detroit, Sep- 

 tember 17, 1896, No. 1556 ; Rochester, September 6, 1909, No. 1556a. 



Elymus Canadenseis L. var. Philadelphicus (L.?) n. var. (E. Philadel- 

 phicus L. Cent. 1, No. 14, 1755? E. Catuidensis Amer. authors not Lin.) The 

 green, non-glaucous plant. Marquette, August 30, 1898, No. 16191/^ ; Rochester, 

 September 0, 1909, No. 1619b ; Monroe Piers, August 10, 1909, No. 2184V2. 



Elymus Canadensis var. brachystachys (Scrib. & Ball.) n. comb. 

 {E. brachystachys Scribn. & Ball. U. S. Agrost. Bull, XXIV, 47, fig. 21, 

 1901). Very common throughout southern Michigan. Belle Isle, August 11, 

 1893, No. 1409 ; Orion, August 29, 1895, No. 1409a ; Island Lake, July 16, 1905, 

 No. 1929^/2 ; Rochester, August 15, 1909, No. 2109y2. 



Elymus Canadensis var. robustus (Scribn. & Sm.) n. comb. {E. robustun 

 Scribn. & Sm. U. S. Agrost. Bull, IV, 37, 1897). Has been reported from 

 various places. The type of the species according to the Linnaean description 

 and explanatory remarks can be no other than Wildenow's E. glaiidfoJmis. 

 The non-glaucous plant that has been passing as E. Canadensis L., may be 

 E. Philadelphicus L. (?) and may be considered as a good variety of the 

 former. E. robustus differs from the var. Philadelphicus only in a denser 

 spike, less alternate at base, which is scarcely a specific character. E. brachys- 

 tachys differs in having the glumes and lemmas hispidulous or glabrate, char- 

 afters that ai-e only of varietal rank. 



Elymus striatus Willd. var. inllosus (Muhl.) A. Gr. This variety shoiild 

 be maintained as valid for the same reason that var. brachystachys is main- 

 tained. In the species the spikelets are hispid and in the variety they are 

 hirsute. On this slender character E. brachystachys (Scribn. & Ball) is main- 

 tained as a valid species by some, but in the case of E. villosas Muhl, an exactly 

 parallel case, the name is reduced to the limbo of synonymy. The species is 

 reported as occurring throughout Michigan. The only form I have seen is the 

 variety. Belle Isle, October 19, 1894, No. 1490. 



Asperella Humb. has three years priority over Hystrix Moench. ; the 

 species is Asperella Hystrix (L.) Humb. Ypsilanti, July 23, 1891, No. 1174; 

 Belle Isle, July 21, 1892, No. 1174a. 



CYPERACEAE. 



Cypcrus inflexus Muhl. should be C. aristatus Rottb. 



Cypcrus esculentus var. leptostachyus Boeckl. is characterized by its much 

 elongated spikelets {%-lV2 in.) Near Birmingham, October 13, 1918, No. 5214. 



Cyperus filiculmus Vahl is common on dry sterile grounds. Parkedale, 

 August 23, 1914, No. 3845. The var. marileiifus Fernald is found in same 



