18 
sempervirens, Olney, of the Pacific slope is C. frigida, Allioni; C. 
_ trrigua, Smith, is C. Magellanica, Lam. ; C. Hartwegii, Boott, of 
Mexico, is C. cladostachya, Wahll, and is Muller’s No. 2054 3G; 
polystachya, Wahl., occurs in Porto Rico, an additional station to 
those in Cuba and Jamaica cited by Mr. Bailey; C. Smithii, Por- 
ter, is referred to C. triceps, Michx.—erroneously, we believe, for 
the plant appears to possess characters which should place it at 
least in varietal rank; C. longirostris, Torrey, has recently been 
collected by Dr. Best in Hunterdon Co., N. J., a station which 
slightly increases its southeastern distribution as given by Mr. 
Bailey; C. Knieskernii, Dewey, is supposed to bea hybrid of 
arctata X formosa, and C. Sullivantii, Boott, as a hybrid of 
gracillima x pubescens; C. glabra, Boott, becomes C. venusta, 
Dewey, var. glaédra, Bailey; C. flaccosperma, of Gray’s Manual, 
is C. glaucodea, Tuckerm., while the true Jlaccosperma, Dewey, is 
a far southern plant; a convenient key is given to the varieties of 
C. laxiflora, Lam.. var. striatula, Carey (var. blanda, Boott), be- 
ing the commonest; C ptychocarpa, Steud, is another species of 
this group distinguished by its glaucous leaves, small, sessile 
staminate spike and short culm, ranging from northern New Jer- 
sey southward; C. Meadii, Dewey, is reduced to C. ¢etanica, 
Schk. var. Meadii, Bailey ; C. inops, Bailey, is a new species of 
the Montane from Mt. Hood, Oregon; C. tenax, Chapm., is C. 
Chapmani, Sartwell; C. Fraseriana, Sims, is C. Fraseri, An- 
drews; C. arenaria, L., the “Sand Carex” of Europe, was 
collected by McMinn near Norfolk, Va.; C. retrofiexa, Muhl., is 
reduced to C. rosea, Schk. var. retroflexa, Torrey; C. stellulata, 
Gooden., is C. echinata, Murray and its var. scirpoides becomes 
var. macrostachys, Boeckl., of the latter, in which C. sterilis, Willd., 
- is included; our common forms of C canescens, L., are referred 
to its var. alpicola, Wahl., and the var. polystachya, Boott, of New 
England and British America is recognized as such; C. dagopod- 
toides, Schk., is C. tribuloides, Wahl., and C. cristata, Schw., is 
made var. cristata, Bailey, of the latter: we had regarded cris- 
tata as sufficiently distinct; C. straminea, Schk., is stretched to in- 
clude an immense number of forms: C mirabilis, Dewey, be- 
comes its var. mirabilis, Tuckerm.: var. congesta, Boott, is a glo- 
bose-headed form from California and Oregon; var. maxima, 
