154 MACKENZIE: Notes on CAREX 
each spike bearing the rather inconspicuous staminate flowers above 
and the 1-5 ascending perigynia beneath; bracts (except the low- 
est) inconspicuous and resembling the scales, the lowest bract 
exceeding its spike, 1 cm. long, slightly enlarged at base and ter- 
minating in a long cusp; scales ovate-triangular, the bodies whitish 
with green midrib, acuminate to cuspidate, about the width of and 
rather shorter than the perigynia, which are not completely con- 
cealed ; perigynia ovate-lanceolate, flat on the inner and rounded 
on the outer surface, glabrous, usually nerved on both surfaces, the 
whole 4 mm. long, the body about 1.7 mm. wide, tapering at base, 
scarcely stipitate, tapering somewhat abruptly into the slightly to 
strongly roughened, strongly bidentate, beak, which is barely 1 
mm. long and only one-third the length of the body; achenes 
lenticular, with short-oblong face, 2. 75 mm. long, 1.5 mm. wide ; 
stigmas two. 
Dr. Boott long ago noticed that this plant is distinct from 
Carex Hookeriana Dewey, a note in his handwriting attached to 
one of the Santa Rita specimens of Bigelow cited below and pre- 
served in the Torrey Herbarium calling attention to the fact that 
it has nerved perigynia, while Carex FHlookeriana has nerveless 
perigynia. More complete specimens collected since this note was 
written have disclosed the fact that other differences exist, which 
separate this plant from Carex Hookeriana as well as from Carex 
occidentalis Bailey. Summarized, the more important distinctions 
may be contrasted as follows : 
the inner face; scales whitish, not concealing the perigynia. C. neomexicana. 
C. Hookeriana. 
nearly or quite concealing the perigynia. C. occidentalis. 
SPECIMENS EXAMINED : 
ARIzona: Yavapai County, Rusby 859, 1883; also 855. 
New Mexico: Wright 7952, 1851-2; “ New Mexico” Dewey ; 
Santa Rita del Cobra on the Rio Mimbras, Bigelow 1547 (type, 
in Herb. Columbia College), 
‘ Carex tumulicola Sp. nov. 
Culms erect, growing in strong clumps, 4.5-8 dm. high, 
exceeding the leaves, roughened on the angles, especially above. 
Leaves with well-developed blades about three or four to a culm, 
