i74 



JTJNCACEAB (RUSH FAMILY) 



682. J. asper. 

 Part of inflorescence x %. 

 Seed X 25. 



583. J, brachycephaluB. 

 Part of inflorescence x %, 

 Seed X IS. 



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. Fio. 582. 



22. J. brachyc^phalus 

 (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 short-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. canadensis J. Gay. Stems 

 tufted, stout and rigid (4-12 dm. high), ^^,.f..^.......^ x % 



bearing in a decompound somewhat Pa^toftaflorescencex%. 

 spreading cyme the numerous 5-50- 



flowered heads ; flowers greenish or light brown (2.5-3.5 mm. long) ; sepals and 

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

 conspicuously tail-pointed. — Marshy places, Nfd. tc 

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



Var. subcaudatus Engelm. Stem slender, often decum- 

 bent (3-6 dm. high), bearing in simpler spreading cymes 

 fewer 8-20-flowerea 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. 



26. J. pelocdrpus Mey. Stems slender (0.6-5 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 



5S4. .1. brevicaudatus. 

 Inflorescence x %. 

 Seed X 16. 



6S5. J. canadensis. 



.^^G, .1. pelocarpus. 

 Part of inflorescence x %. 

 Same, proliferous X %. 

 Flower x 8. 



