44 Rhodora [Marcu 
The other plants have all been referred to C. miliaris, Michx., an 
American species. 
The botanical party! which recently explored a portion of Mt. 
Katahdin in Maine found two species of this group growing about 
the ponds upon the lower slopes of the mountain. One of these, a 
low plant with broad flat leaves and small purple spikes of nerveless 
perigynia is exactly the C. saxatilis, L. (C. pulla, Good.) of north- 
ern Europe. The other, a taller plant with yellowish-green or 
brownish spikes of nerved perigynia, is a good match for the origi- 
nal material of C. Grahami, Boott, of Scotland. Most of the 
Katahdin C. saxatilis is identical with the Hudson Bay plant so 
treated by Prof. Bailey, but a few plants found at a second station 
show the involute leaves characteristic of C. miliaris. Now by 
Carey and Gray and.formerly by Prof. Bailey, C. miliaris was 
treated as a form of the European C. saxatilis (C. pula), but 
recently Prof. Bailey has separated Michaux's C. miliaris as an 
American species taking for his distinctions the narrower leaves 
and paler narrower spikes of the latter plant. That the breadth of 
leaf is not constant is very apparent in specimens from Mt. Katah- 
din. The spike in good C. miliaris varies much in length and is 
often as short as in C. saxatilis, and the purple-brown perigynia of 
Robinson & Schrenk's Newfoundland plant (No. 87 — in all other 
points good C. miliaris) show that the color-character has little final 
value. 
As already stated the taller plant growing by Depot Pond at the 
entrance to the Basins of Mt. Katahdin is C. Grahami of Scotland. 
This very rare species was described by Francis Boott from material 
collected by Wight on cliffs at Glen Phee, Clova, and the Katahdin 
plant is apparently identical with the original material, with which it 
has been carefully compared. The American plant described by 
Prof. Bailey as C. miliaris, var. (?) aurea, ordinarily has slightly 
narrower spikes than the Glen Phee and Katahdin specimens of C. 
Grahami, but most of the material of that form yet examined is 
immature. The perigynia, however, are inflated and nerved as in 
C. Grahami so that little hesitation is felt in placing the plants with 
that species. It is doubtful, though, whether most of the Rocky 
Mountain specimens which have sometimes been referred to C. 
1J. R. Churchill, J. F. Collins, M. L. Fernald, G. G. Kennedy, and E. F. 
Williams. 
