366 MACKENZIE: Notes ON CAREX—XII 
normally narrower and but 2.5-3 mm. in width (although 
occasionally more); and the lateral spikes are round-tapering 
at base. 
The northern plant is evidently abundantly distinct and it 
should be treated as 
‘Carex cumulata (Bailey) Mackenzie sp. nov. 
Carex alata Torr. var. pulchra Olney (mostly), Exsicc. fasc. 2, 
No. 23 (also Bailey Proc. Am. Acad. 22: 150 as synonym). 
1871. 
Carex straminea Willd. var. cumulata Bailey, Mem. Torrey 
Club 1: 23. 1889. 
Carex albolutescens Schw. var. cumulata Bailey, Bull. Torrey 
Club 20: 422. 1893. 
Very densely cespitose, the rootstock not prolonged, the 
culms 3-9 dm. high, stiff, sharply triangular, roughened beneath 
head, brownish at base and clothed with the dried-up leaves of 
ed, the lower nodes sometimes expo lades 
flat, light-green, thickish, erect or ascending, 3-5 mm. wide, - 
7-25 cm. long, roughen ed towards apex, the sheaths loose, 
strongly green striate easel and conspicuously prolonged be- 
yond base of blade and continuous with the ligule; sterile shoots 
elongat e cig usually 4-5 mm. wide, occasi hate nar- 
rower, erect, the s s very loose; alas five to thirty 
candrous, very coeele aggregated into an ovoid or oblong hed: a 
cm. long, 1-2 cm. thick, the spikes ovoid, 6-10 mm. long, 5-8 
mm. thick, short-pointed at apex, the lateral truncate or rounded 
at base, the terminal clavate, — Bas ring or in age 
brownish, closely many-flower ia ascending with 
ot 
oa 
popepicucs: ae ovate, obtuse or acute, much narrower and 
shorter e perigynia, white-hyaline with one- to three- 
nerv een center ; peri in, pia es hse wea m 
te middle, ct ea me ight babar a dorsally, 
> . 2 ¥3 
obovoid, at maturity yellowish brown, very short substipitate, 
2 mm. long, 1.25 mm, wide, bent-apiculate; style slender, 
