204 THE MICHIGAN ACADEMY OF SCIENCE. 



the var. barchypodum (Fernald) ; {Scirpus atrocinctits v. hrachypdus 

 Fernald. Pro. Amer. Acad. Arts and Sci.. 34, 502, 1899). E. polystachyon 

 Lin. and its var. latifolium (Hoppe) A. Gr. are frequent in bogs. The 

 copper-colored cotton-grass E. Yirginicum L. and its albino variety, 

 the var. album A. Gr. also occur in bogs. E. gTacile Koch and its var. 

 paucinervium Engelm. are common in swampy and marsh}' grounds, but 

 the species is much rarer than the variety. 



.Rhynchospora capillacea Torr. var. laeviseta E. J. Hill, is frequent in 

 swamps at Orion. With this is the rare nut rush, Scleria verticillata 

 Mnhl. 



C. rostrata Stokes var. am'bigens Fernald. To this variety unquestion- 

 ably belongs certain ambiguous forms which I at first referred to C. 

 monile, but later intended to describe as a variety thereof. This variety 

 is probably a hybrid between C. utriculata and C^, monile. Other forms 

 with the terminal spike, oftentimes very slender and nearly all pistil- 

 late, and other spikes very loosely flowered and generally long and fili- 

 formly peduucled, may be known as Carex rostrata Stokes var. Cliftonii, 

 It was collected in a peat-bog near Clifton. It is a form of the species 

 that corresponds to the C. vesicaria L. var. monstrossa {Bailey) {G. 

 monile var. monstrossa, Bailey Mem. Torr. Bot. Club, 1, 40, 1899), to 

 which variety I refer similar Keweenaw forms of C. vesicaria found 

 along the banks of streams: 



C. Hartii Dew. is a form of C. retrorsa having scattered spikes with 

 spreading perig^mia ; Keweenaw county, along the banks of streams, rare. 

 Carex hystericina Muhl. var. Cooleyi Deiv. is a Avell-marked form and 

 should be recognized. I have it from Keweenaw county and Belle Isle 

 in Detroit R. C. typhinoides Scliw. is a form that has not generally 

 been considered to be distinct from C. squarrosa Lin. I have it from 

 Detroit; also a specimen from Hubbardston, collected by C. F. Wheeler 

 and distributed as C. squarrosa. 



C. stricta Lam. var. strictior {Dew.) A. Gr. as it occurs in the copper 

 district is easily separated from the species and is even more distinct 

 than the var. angustata {Boott) Bailey. It should be recognized. In 

 studying some specimens of this species collected in Keweenaw county in 

 1900, I found a few specimens of both C. aquatillis Wahl, and C. lenticu- 

 laris Mx., intermixed. C. formosa Dew. is frequent in Avoods near Birm- 

 ingham. C. aurea Nutt. var. androgyna Olney may perhaps be pressed 

 into service for a form of this species growing in moist, grassy places; 

 it has long weak reclining stems, about a foot long, with longer, more 

 scattered spikes more slenderly pediceled, the lower often drooping and 

 the terminal pistillate at- summit. Whole plant green. Nuttal's species 

 is the common rigid form from two to six inches in height, yellowish 

 in appearance, with approximate spikes and is most frequent in moist, 

 sandv or rocky places. C. Richardsoni R. Br. is found on sandy hills 

 near Orion, but is quite rare. Carex alopecoidea Tuckerm. was collected 

 in the valley of the Huron near Ypsilanti. It is one of our rare carices. 

 The old C. stellulata of our manuals has been revised and the forms are 

 now C. stellulata Good, common throughout the State; var. excelsior 

 {Bailey) Fernald in woods and in peat bogs in Keweenaw county; var. 

 cephalantha {Bailey) Fernald. on moist banks and borders of streams 

 in Keweenaw county; var. angustata Carey is frequent with the preced- 

 ing. The first two varieties are taller and more slender tli:n! the species. 



