212 CYPERACEAE 



45. Carex Cheroke6nsis Schwein. Stems and scapes 3-8 dm. tall, slender : leaves 

 light green, overtopped by the scape ; blades elongated, 2-5 mm. wide, rough toward the 

 apex : staminate spikes 5-15, cylindric, often 2 or 3 together, all nodding from filiform 

 peduncles : perigynia oblong-ovoid, numerous, 4-5 mm. long, whitish green, slightly 3- 

 angled, each with a curved membranous orifice, surpassing the ovate or oblong acute 

 whitish scale. 



On river banks and about swamps, Georgia and Florida to Arkansas and Texas. Spring and summer. 



46. Carex juncea Willd. Stems and scapes densely tufted, slender, 2-4 dm. tall : 

 leaves deep green, as long as the scape or overtopped by it ; blades very narrowly linear, 

 1-1.5 mm. wide, smooth : staminate spike slender, 1-2 cm. long, peduncled : pistillate spikes 

 1-3, linear, 1-3 mm. long, 3-4 mm. thick, the lower one longer peduncled than the others : 

 scales ovate or lanceolate, about as long as the perigynia or shorter : perigynia spindle- 

 shaped, about 5 mm. long, 3-angled, each with a rough apex and an entire orifice. 



On exposed mountain summits at very high altitudes, North Carolina and Tennessee. Summer. 



47. Carex t6nuis Rudge. Stems and scapes rough above, 1-9 dm. long. Leaves 

 bright green ; blades 3-5 mm. wide : lower bracts similar to the leaves : staminate spike 

 short-stalked : pistillate spikes 2-5, linear, 3 mm. thick, filiform-stalked and spreading or 

 drooping : scales ovate or oblong, J as long as the perigynia : perigynia spindle-shaped, 

 glabrous or puberulent, faintly few-nerved, obtusely 3-angled, 6 mm. long, less than 2 mm. 

 thick, each tapering into a short 2-toothed beak. 



In woods, Newfoundland to Michigan, North Carolina and Kentucky. Spring and summer. 



48. Carex debilis Michx. Stems and scapes 3-8 dm. tall, smooth : leaves deep- 

 green, overtopped by the scape : blades 3-6 mm. wide, rough : staminate spike inconspic- 

 uous, 1-4 cm. long, slender : pistillate spikes 3-5, linear, remote or approximate near the 

 top of the scape, arching or drooping, 2-5 cm. long, not compact : scales about J as long as 

 the perigynia : perigynia spindle-shaped, 8-10 mm. long, glabrous, 3-angled, pinched at 

 the base, few-ribbed, each acuminate to a subulate 2-cleft beak, appressed to the rachis. 



In pine lands, South Carolina to Florida and Louisiana. Summer. 



49. Carex vemista Dewey. Stems and scapes slender, 6-1 2 dm. tall, smooth : leaves 

 light green, overtopped by the scape ; blades 3-8 mm. wide, scabrous : staminate spike 

 slender, 2-5 cm. long: pistillate spikes 3-5, linear, arching or drooping, 2.5-5 cm. long, 

 the upper often approximate, the lower remote : scales about as long as the perigynia : 

 perigynia spindle-shaped, mostly 5-6 mm. long, acute at both ends, appressed to the rachis, 

 closely pubescent, prominently few-ribbed. 



In low pine woods, North Carolina to Florida. Spring and summer. 



50. Carex oblita Steud. Stems and scapes sharply 3-angled, smooth or nearly so, 

 3-9 mm. long : leaves glabrous, shorter than the stem ; blades 4-5 mm. wide : lower bract 

 similar to the leaves : staminate spike solitary, filiform -stalked : pistillate spikes 3-5, 2-6 

 cm. long, about 5 mm. thick, loosely flowered, slender-stalked, the lower distant, droop- 

 ing : scales obtuse, about the length of the perigynia : perigynia 3-angled, glabrous, 6 

 mm. long, less than 2 mm. thick, each tapering into a short 2-toothed beak. 



In bogs, central New York to New Jersey, North Carolina and Mississippi. Summer. 



51. Carex griaea Wahl. Stems and scapes smooth or nearly so, 3-6 dm. long : leaves 

 light green, sometimes slightly glaucous : bracts similar to the leaves, much overtopping 

 the spikes : staminate spike sessile : pistillate spikes 3-5, oblong, 8-25 mm. long, about 4 

 mm. thick, the lower slender-stalked and distant : scales cuspidate or awned : perigynia 5 

 mm. long, 2 mm. thick, beakless. 



In woods and thickets, Maine to Ontario and Minnesota, North Carolina and Kansas. Spring and 

 summer. 



52. Carex amphibola Steud. Stems and scapes slender, 3-5 dm. long : leaves bright 

 green ; blades 2-4 mm. wide : bracts similar to the leaves, erect, not over 2 mm. wide, 

 overtopping the spikes : staminate spike short : pistillate 2-4, 1-2.5 cm. long, less than 4 

 mm. thick, loosely several-flowered, the lower on filiform stalks : scales awned, spreading : 

 perigynia oblong or obovoid, firm, pointed, beakless, 3-angled, 4 mm. long, about 2 mm. 

 thick. [ C. grisea var. angustifolia Boott. ] 



In dry soil, New Jersey and Pennsylvania to Iowa, Florida and Texas. Spring. 



53. Carex flaccosp6rma Dewey. Similar to Carex grisea and C. glaucodea in habit, 

 slightly glaucous. Stems and scapes 3-6 dm. tall : leaves delicate ; blades thin, the basal 

 ones 6-12 mm. wide : bracts leafy : staminate spike sessile or nearly so : pistillate spikes 

 2-4, oblong, erect, the lower slender-stalked : scales broadly ovate, green, |- as long as 

 the perigynia : perigynia oblong, 3-angled, 5 mm. long. 



In low grounds or on shaded hillsides, southern Missouri to Texas, North Carolina and Florida 

 Summer. 



