274 



JUNCACEAE (RUSH FAMILY) 



582. J. asper. 

 Part of inflorescence x 

 Seed x 25. 



583. J. brachycephalus. 

 Part of inflorescence x %. 

 Seed x 18. 



branches, bearing scattered few(2-6)-flowered heads ; 



flowers greenish with brown (4.5 mm. long) ; sepals 



ovate-lanceolate, awl-pointed, rigid and strongly nerved, 



shorter than the similar petals, these a little shorter 



than the triangular-ovoid beaked incompletely 3-celled 



brown capsule ; ovary taper- 



ing into a conspicuous style ; 



seeds large, subcylindric, 



with white or often reddish 



appendages. (J. caesarien- 



sis Coville). Sphagnous 



swamps, s. N. J., very local. 



Aug.-Sept. FIG. 582. 

 22. J. brachycephalus 



(Engelm.) Buchenau. Stem 



slender (2.5-7 dm. high), 



bearing numerous small 3-5- 



flowered heads in a large 



(0.5-2.5 dm. long) spread- 



ing cyme ; flowers green- 



ish or light brown ; sepals 



shorter than the petals and 

 the brown abruptly sbort^pointed capsule. (J. canadensis, var. Engelm.) 

 Marshes and wet shores, n. Me. to Wise., s. to Ct., Pa., and 

 111. July-Sept. FIG. 583. 



23. J. brevicaudatus (Engelm.) 

 Fernald. Stem slender (1.5-7 dm. 

 high), bearing few deep-brown 3-7- 

 flowered heads in a somewhat erect 

 contracted cyme (2.5-15 cm. long) ; 

 flowers 2. 5 mm. long ; sepals acute, the 

 petals rarely obtusish, much shorter 

 than the prismatic gradually pointed 

 deep-brown capsule. (J. canadensis, 

 vars. brevicaudatus and coarctatus En- 

 gelm.) Muddy or damp places, Nfd. 

 to Ont., W. Va., and Minn. June- 

 Sept. FIG. 584. 



24. J. canadSnsis J. Gay. Stems 

 tufted, stout and rigid (4-12 dm. high), 

 bearing in a decompound somewhat 

 spreading cyme the numerous 5-50- 



flowered heads ; flowers greenish or light brown (2.5-3.6 mm. long) ; sepals and 

 petals awl-pointed, mostly shorter than the abruptly short-pointed capsule ; seeds 

 conspicuously tail-pointed. Marshy places, Nfd. to 

 Minn., Ga., and La. Aug.-Oct. (S. A.) FIG. 585. 



Var. subcaudatus Engelm. Stem slender, often decum- 

 bent (3-9 dm. high), bearing in simpler spreading cymes 

 fewer 8-20-flowered heads ; flowers greenish ; sepals awl- 

 shaped, but not so rigid ; capsule mostly tapering ; seeds 

 with short white membranous appendages. R. I. to Pa. 

 and Ga. Perhaps specifically distinct. 



25. J. pelocarpus Mey. Stems slender (0.5-5 dm. 

 high), bearing few thread-like slightly knotted leaves, 

 branching above into a compound spreading cyme ; flow- 

 ers small (2.5 mm. long), greenish with red ; sepals and 

 petals oblong, obtuse, the petals longer, but shorter than 

 the slender taper-beaked 1-celled capsule ; style slender ; 

 seeds (0.5 mm. long) obovoid, short-pointed. -~- Sandy, 

 wet or swampy places, Nfd. to N. J., Pa., Minn., and 



5<vt. .1. lirevicaudatua. 

 Inflorescence x %. 

 Seed x 16. 



* of inflorescence x %. 



586. J. pelocarpus. 

 Part of inflorescence x 

 Same, proliferous x %. 

 Flower x 8. 



