JUNCACE^. (ULSH FAMILY.) 5-13 



ing in fruit, as long as the globular beaked liglit mahogany-colored capsule , 

 anthers nearly as long as the fihimerits; style short ; seeds small (^ - i" long), 

 coarsely cross-lined. — Low sandy grounds, N. J. to Kla. 



16. J. GerArdi, Loisel. (Black-CiKass.) Stems scarcely tiattened, rigid 

 (1-2° hiich) ; panicle contracted, usually longer than the bracteal h-af ; tiow- 

 ers chestnut-brown with green (If" long) ; sepals oval-oblong, ubtu.se, incurved, 

 as h)ng as the oval obtuse and niucronate ca])sule; anthers much longer than 

 the short filaments; style as long as the ovary; seeds (nearly ^'' long) obo- 

 vate, delicately ribbed and cross lined. — Salt marshes; ccnnmon along the 

 coast and in W. New York; rare about the Great Lakes. (Eu.) 



•*- -4- Stems branched, diffuse, leafy ; root annual, Jihrous. 



17. J. bufbnius, L. Stems low and slender (3-9' high), leafy, often 

 branched from the base; panicle spreading, mostly with one-sided diclioio 

 nious branches; flowers remote, greenish (2-3J" long); sej)als linear-lanceo- 

 late, awl-pointed, the 3 outer much exceeding the inner and the oblong ob- 

 tuse capsule ; stamens short ; filaments scarcely longer tlian the anthers , seeds 

 elliptical, obtuse (i-^" lt>i'g)- — 1^*^^^' gi'ouuds, by roadsides ; common. (Ku.) 



§ 3. Stei)is leaf 11 ; leaves terete or lateral! i/ flattened, more or less dtstmctlij knot- 

 ted by internal transverse partitions; panicle terminal, with flowers chiefy 

 in heads. — Knotty-leaved Jinci. 



* Seeds barely pointed, not caudate. 



■»- Flowers solitary or 2 together, panicled ; stamens 6. 



IB. J. pelocarpus, E. Meyer. Stems slender and erect from a slender 

 running rootstock (6-18' high), bearing few thread-like slightly knotted 

 leaves, branching above into a compound spreading panicle, bearing the flow- 

 ers in the forks and along one side of the branches; often with the flowers or 

 in place of them are tufts of leaves; flowers small (1 - 1^" long), greenish with 

 red ; sepals oblong, obtuse, the 3 inner ones longer, but shorter than the ol)- 

 long taper-beaked, 1-celled caj)sule; anthers much longer than the filaments; 

 style slender ; seeds (^" long) obovate, short-pointed. — Sandy, wet or swampy 

 places, Newf. to Fla., west along the Great Lakes to Minn. The proliferous 

 plants are usually sterile and much larger, with larger diffu.se panicles.— 

 Var. suBTiLis, Engelm. Creeping or floating, with a single pair of flowerj 

 at the end of the short stems. — Somerset Co., Maine (C. E. Smith) ; Canada, 

 -t- -*- Heads numerous, of 3 - 12 floivers {rarely more) ; in early summer. 

 -M- Stamens 6. 



19. J. articul^tus, L. Stems ascending or erect (9- 1')' high), tuftcd- 

 from a short creeping rootstock, with 1 or 2 slender leaves ; panicle short, 

 spreading, the crowded heads 3-8-flowered; flowers brown, rarely pale (1:^- 

 H" long) ; sepals lance-oblong, acute or mucronate, or the 3 inner obtuse and 

 a little longer, shorter than the ovate-oblong acute or abruptly mucronate- 

 pointed incompletely .3-celled commonly deep chestnut-brown shining capsule; 

 anthers as long as the filaments; ovary attenuate into a short style; seeds 

 (less than J" long) obovatt, attenuate below, abruptly pointed above. — Wet 

 grounds, Newf. to Del., west to western N. Y. and Mich. (Eu.) 



