CONTRIBUTIONS TO THE BOTANY OP MICHIGAN. 203 



Arichodium niontamou Torr., which according to A. Gray is A. oreopJi.ila 

 Trin. Another form is i"\ther rigidly erect, about a foot high, pale and 

 more or less glaucous, with broad Hat leaves and a short linear, con- 

 tracted panicle about two inches long. It may be known as Agrostis 

 hyemalis var. Keweenawensis. It probably is Torry's A. laxi ora var. 

 tenuis. It is found on the rocky shores of Lake Superior within intiuence 

 of the spray. 



Avena sativa Lin., the cultivated oat is an escape throughout the State 

 and probably deserves to be ranked as adventitious. The two native 

 species, A. Smithii T. C. P. and A. striata M,r. are common in the woods 

 in the copper district. 



Eatonia nitida [i^sijrcny) JSasii. is sparingly found on sandy hills near 

 Orion. 



Poa glauca TaJil., P. nemoralis L., and its var. firmula Host, are spar- 

 ingly found on rocky shores and on rocky blutfs in Keweenaw county. 



P. autunmalis Muhl. is sparingly found in woods at Kochester. 



Panicularia pallida i^Torr.) 0. K. var. flava (Scribn.). (Glyeera flava 

 Seribn. ) A robust form of the species frequent in sphagnum in Keweenaw 

 county. It has broad, flat leaves, two to four lines wide, and a very large 

 ovate or oval panicle, 7-9 inches in length, with the branches in 3's-5's; 

 spikelets longer and broader than in the species. 



It seems to me that the grass referred by Br. Beal to Festuca rubra 

 subsp. heterophylla is more properly a form of F. ovina Lin., approach- 

 ing the var. polyphylla Vasey more nearly than any other form. It can 

 not be of F. rubra as it is not stoloniferous. F. ovina Lin. occurs at 

 Detroit and its variety duriuscula (L.) Hack occurs at Rochester. 



There are numerous forms of couch-grass and wheat-grasses in Michi- 

 gan. Agropyron repens (L.) Beauv. and its var. nemorale Anders I have 

 collected in Keweenaw county. Other species and varieties of this genus 

 that are found in the Upper Peninsula are. 



A. pseudorpens ^'. tC- 8., rocky places in Keweenaw county and at Mar- 

 quette; A. Smithii Rydh., Keweenaw county, also in Detroit; A. 

 dasystachyum (Hook.) Vasey and its var. subvillosum S. d- S. in Kewee- 

 naw ccwLinty; A. violaceum (Hornem) Vasey., A. tenerum Tascy. and A. 

 Richardsonii Sclirad., are also found in Keweenaw county together with 

 A. spicatum {Ph.) Rydh. and its variety inermis {S. t6 8.) Heller. 



Triticum testivum Lin., the common wheat, and its var. hybernum (L.) 

 0. A. F., the bearless wheat, have escaped in Keweenaw county and doubt- 

 less in other localities. They should, perhaps, be classed as adventive. 

 The barley, Hordeum vulgare Lin., is not as frequently met with as the 

 wheats. 



Cyperacecv. 



» 



Eleocharis ovata [Roth.) R. c£- ;S'., has recently been divided and E. 

 obtusa (TF.) Sclmltes has been restored to specific rank; the former I 

 have collected in Keweenaw county, but it is rare; the latter is the com- 

 mon species throughout the State. 



Britton's variety pallidus of Scirpus 'atrovirens Mulil. occurs in the 

 copper regions and probably throughout the State. 



Eriophorum cj'perinum Lin., the wool-grass occurs but sparingly in 

 the copper district where the principal form is the var. atrocinctum 

 {Fernald) 0. A. F. Another variety, about as rare as the species, is 



