﻿Mackenzie: Notes on Carex 411 



Cespitose, the culms slender, 3 mm. thick near base, 5-10 dm. 

 high, aphyllopodic, sharply triangular and strongly roughened on 

 the angles above, usually much exceeding the leaves, the fertile 

 slightly or not at all filamentose at base. Leaves with well- 

 developed blades two to four to a fertile culm, on the lower fourth 

 but not bunched, the sheaths papery and yellowish- or whitish- 

 hyaline ventrally, smooth or nearly so, the blades flat with slightly 

 revolute margins, about 2.5 mm. wide, usually 1-2 dm. long, very 

 rough towards the apex ; sterile culm leaves longer. Terminal spike 

 stiminate (usually with an additional sessile smaller one at base), 

 linear, 2-4 cm. long, 3 mm. wide, the scales oblong spatulate, 

 obtuse to acutish, reddish brown with lighter center and hyaline 

 margins. Pistillate spikes two or three, erect, sessile or nearly so, 

 approximate or a little separate, linear, 1.5-3 cm. long, 4-5 mm. 

 wide, occasionally staminate at apex, scarcely attenuate at base, 

 the perigynia very numerous, in few rows, spreading-ascending; 

 bracts sheathless without dark colored auricles, the lowest 2 mm. 

 wide, normally exceeded by inflorescence ; the upper much reduced- 

 Scales ovate or lanceolate, long acuminate to acute, narrower than 

 but strongly exceeding perigynia, from dark brown to straw color, 

 with lighter center and hyaline margins. Perigynia light brownish 

 at maturity, flattened biconvex, broadly oval to suborbicular, 

 two-edged nerveless or obscurely few-nerved, 2-2.5 rni^i- long, 

 1. 25-1 .75 mm. wide, membranaceous and slightly inflated, 

 puncticulate and resinous dotted, minutely granular towards apex, 

 round-tapering at base and apex and abruptly very minutely 

 (0.2 mm. long) beaked, the orifice hyaline, entire or emarginate. 

 Achenes lenticular, substipitate, apiculate, yellowish, with orbicu- 

 lar faces, I mm. long; style exserted; stigmas two. 



This species has in times past been confused with Carex 

 aperta Boott, a phyllopodic species from the Columbia River 

 region. Although frequently treated as a variety of Carex striata 

 Lam., one cannot help feeling that this is due to lack of knowledge 

 of the two species. They are really thoroughly distinct species, 

 and I have seen no evidence of any tendency to intergrade. 



Specimens examined 



New Brunswick: Bathurst, Fowler, August 4, 1874 (N. Y.). 



Maine: Bangor, Knight, June 27, 1905 (K. M.); Bangor, 

 Mackenzie 3188, July 3. 1908 (K. M.); Orono, Harvey, August, 

 1891 (N. Y.); Orono, FernaU, June 28, 1890 (C); St. Francis, 

 Fernald 135, August 5- 1893 (C). 



New Hampshire: Keene, Gilbert, June 11, 1877 (N. Y.). 



