542 JUNCACE^. (RUSH FAMILY.) 



ered ; flowers green (3" long) ; sepals rigid, lance-subulate, slender-pointed, 

 the 3 outer as long as the linear triangular obtuse capsule, the inner much 

 longer ; stamens as long as the outer sepals ; filaments many times longer 

 than the oblong anthers; seeds small (" long),obovate, slightly pointed, very 

 delicately ribbed and cross-lined. Miry banks, Md. to Fla. and La. 



11. J. marginatus, Rostk. Stem erect, from a bulbous and stoloniferons 

 base (1-3 high); leaves long-linear ; heads 3 - 8-flowered, paiiicled ; flowers 

 purplish with green (iy long) ; sepals oblong, the 3 outer acute and slightly 

 awued, the inner longer, mostly obtuse, as long as the almost globular scarcely 

 mucronate capsule ; stamens exceeding the outer sepals ; purple anthers shorter 

 than the filaments ; style very short ; seeds (| - \" long) slender, pointed at 

 both ends and strongly ribbed. Moist sandy places, S. New Eng. to Fla., west 

 to Mich., Mo., and Tex. Var. PAUCICAPITA.TUS, Engelm., has few large 8- 

 15-flowered heads; and var. BIFL^RUS, Engelm., has numerous small 2-3- 

 flowered heads in much-branched panicles. 



* * Flowers solitary, panicled ; stamens 6. 



-t- Stems slender, simple, tufted, leaf// below ; root perennial (fl. early in sumnur). 

 *+ Seeds tail-pointed at both ends. 



12. J. Vaseyi, Engelm. Stems rigid (1 -2 high) ; leaves nearly terete, 

 very slightly channelled on the inner side; panicle longer than the involucral 

 leaf, loose; flowers few, often one-sided, greenish or light brown (2" long or 

 more) ; sepals lanceolate, acute, appressed, shorter than the oblong and retuse 

 green-brown capsule ; anthers as long as the filaments ; style very short ; seeds 

 slender (|- f" long), closely ribbed. N. Maine (Pringle) ; Mich, to Iowa and 

 westward. 



13. J. Greenii, Oakes & Tuckerm. Stems rigid (1-2 high); leaves 

 nearly terete, very deeply channelled (almost involute) on the inner side ; pan- 

 icle usually much shorter than the principal erect involucral leaf, dense, the 

 numerous flowers often one-sided (If" long); sepals lanceolate, acute, light 

 greenish-brown, appressed, shorter than the ovoid-oblong obtuse greenish-brown 

 capsule ; anthers as long as the filaments ; style very short ; seeds ovoid (|-f" 

 long), ribbed and delicately cross-lined. Sandy coast of N. Eng , N. Y., and 

 N. J., and about the head of Lake Michigan. 



*+ -M. Seeds mereh/ apiculate at both ends. 



14. J. tenuis, Willd. Stem wiry (9-18' high) ; leaves flat or channelled ; 

 panicle shorter than the involucral leaves, loose, or rarely crowded ; flowers 

 green (2" long or more) ; sepals lanceolate, very acute, spreading in fruit, 

 longer than the ovoid retuse scarcely pointed green capsule ; anthers nearly 

 equal to the filaments; style very short; seeds small (about |" long), delicately 

 ribbed and cross-lined. Fields and roadsides, very common. (En.) Yar. 

 SECUNDDS, Engelm. ; flowers smaller, secund along the incurved branches. 

 N. Eng. to Penn. and Del. Var. CONGESTUS, Engelm. ; branches contracted 

 into a head and the flowers darker-colored. Minn, and westward. 



15. J. dichotomus, Ell. Stems rigid (l|-2 high) from a tumid base; 

 leaves filiform, nearly terete, slightly grooved on the inner side ; panicle loose, 

 often with 1 -sided forked branches, mostly longer than the involucral leaf ; 

 flowers greenish (2" long or more) ; sepals lanceolate, sharp-pointed, spread- 



