Carex 



Cyperaceae 



225 



50 



Map 435 



Carex vulpinoidea Michx 



15. Carex annectens Bickn. (Bull. Torrey Bot. Club 35: 492. 1908.) 

 (C. setacea Dewey var. ambigua (Barratt) Fern.) Map 434. Fairly com- 

 mon in the southern counties ; infrequent in northern Indiana. In southern 

 Indiana it occurs most commonly in low flat woods although it is frequently 

 found in wet fallow clay fields; in the northern counties it is usually in 

 marshes or pastures. 



Maine to Wis., southw. to Tex. and Fla. 



15a. Carex annectens var. xanthocarpa (Bickn.) Wieg. (Bull. Tor- 

 rey Bot. Club 23: 22. 1896; Rhodora 24: 74. 1922.) (Carex xantho- 

 carpa Bickn. and Carex brachyglossa Mack.) Known in Indiana from a 

 single collection : Deam no. 42927, in a low place in an open post oak flat 

 south of Half Moon Pond, 10 miles southwest of Mt. Vernon, Posey 

 County. 



The report from Knox County by Deam was based upon a collection 

 determined by Mackenzie as C. brachyglossa but the specimen should be 

 referred to C. annectens. 



Maine to Iowa, southw. to Va. and Kans. 



16. Carex vulpinoidea Michx. Map 435. One of the commonest sedges 

 of swampy places throughout the state. Its favorite habitat is in roadside 

 ditches but it is found also in marshes, swamps, low open woods, and 

 ravines, on flood plains, and banks of streams and ponds. 



Newf. to B. C, southw. to Fla., Tex., Ariz., and Oreg. 



6. § PANICULATAE 



Leaf blades 3-8 mm wide ; perigynia very abruptly short-beaked, tapering at the base ; 



inflorescence usually 8-15 cm long, obviously branched 17. C. decomposita. 



Leaf blades 1-3 mm wide; perigynia tapering or contracted into the beak, rounded or 



truncate at the base; inflorescence 2.5-5 (8) cm long, obscurely branched. 



Sheaths not copper-colored at the mouth; head little interrupted; perigynia 2-2.5 



mm long, convex ventrally, lustrous, not concealed by the scales. . . 18. C. diandra. 



Sheaths copper-colored at the mouth; head interrupted; perigynia 2.5-3.5 mm long, 



flat or concave ventrally, dull, nearly concealed by the scales .... 19. C. prairea. 



