146. Carex Aestivaliformis Mackenzie. False Summer Sedge

Fig. 1013

C. gracillima X aestivalis? Bailey, Bull. Torr. Club 20:

419. 1893. C. aestivaliformis Mackenzie, Bull. Torr. Club 37: 238.


Culms slender, erect, strongly roughened above, 1° -2° high. Leaves flat, 1"-2" wide, elongated, but usually shorter than the culms, rough, the lower sheaths (at least) short-pubescent, the blades sometimes slightly so; lower bract foliaceous, often overtopping the culm, strongly sheathing, the others smaller, little sheathing; spikes 3 to 5, narrowly linear-cylindric, I"- l 1/2" long, 1 1/2 in diameter, many-flowered with perigynia rather close, filiform-stalked, and, at maturity, spreading or drooping, the terminal one gynaecandrous; perigynia oblong-ovoid, obscurely triangular, deep green, round-tapering at base, slightly swollen, somewhat less than 2' long, nearly 1" thick, strongly several-nerved, tapering and very short-beaked at apex, the orifice more or less hyaline and emarginate or shallowly bidentate; scales ovate, strongly hyaline-margined, somewhat shorter than the perigynia; stigmas 3.

In mountain meadows, New Jersey, New York and Pennsylvania. June-July.

146 Carex Aestivaliformis Mackenzie False Summer S 1013

147. Carex Aestivalis M. A. Curtis. Summer Sedge

Fig. 1014

Carex aestivalis M. A. Curtis; A. Gray, Am. Journ. Sci. 42: 28. 1842.

Culms very slender or filiform, erect or nearly so, roughish near the summit, 1°-2 1/2° tall. Leaves flat, 1"-1 1/2" wide, elongated but usually shorter than the culm, the lower sheaths at least short-pubescent, the blades sometimes slightly so; lower bracts sheathing, similar to the leaves, but narrower, the others smaller, little sheathing; spikes 3-5, narrowly linear, erect or somewhat spreading, 1-2 long, about 1 1/2 thick, loosely many-flowered or the upper ones dense, the terminal one staminate at the base or also at the summit; perigynia narrowly elliptic, pointed at both ends, 3-sided, not inflated, glabrous, few-nerved, 1 1/2" long or less, i" thick, beakless, the orifice entire; scales ovate-oblong, obtuse, or the lower cuspidate or short-awned, green, thin, usually about one-half as long as the perigynia or more; stigmas 3.

In mountain woods, New Hampshire, Massachusetts and northern New York to Georgia. Winter-grass. June-Aug.

147 Carex Aestivalis M A Curtis Summer Sedge 1014

148. Carex Oblita Steud. Dark-Green Sedge

Fig. 1015

Carex oblita Steud. Syn. PI. Cyp. 231. 1855.

Carex glabra Boott, 111. 93. 1860.

Carex venusta var. minor Boeckl. Linnaea 41: 255. 1877.

Glabrous, culms slender, erect or lax, sharply 3-angled, smooth or very nearly so, 1°-3° high. Leaves 2"-3" wide, shorter than the culm, slightly rough; lower bract similar to the culm-leaves but narrower, the sheaths puberulent; staminate spike solitary, filiform-stalked, sometimes partially pistillate; pistillate spikes 2-4, narrowly linear, l'-2 1/2' long, about 2" thick, loosely 4-18-flowered, slender-stalked, the upper mostly close together and spreading or ascending, the lower distant, drooping; perigynia dark green, coriaceous, 3-angled, glabrous, somewhat more than 2 1/2" long, less than 1" thick, ascending, rather strongly about 10-nerved, tapering into a short hyaline-tipped, 2-toothed beak; scales obtuse or acute, strongly reddish-brown-tinged, one-third to one-half the length of the perigynia; stigmas 3.

In bogs, central New York, Pennsylvania and New Jersey to Alabama and Louisiana. June-Aug.

148 Carex Oblita Steud Dark Green Sedge 1015148 Carex Oblita Steud Dark Green Sedge 1016