I 



UEXxiNDRIA 3I0KOGYMA. 409 



'lis Tatei'alibus tcrminali- | cral and terminal; flow- 

 biisquc ; floiibiis S-an- \ ers triaiulrous. 

 diis. K. 



Mich. 1. p. 191. 



Creepin:r, shootinjj up at short intervals small tufts. Stem 6—10 

 inches !ii-)j. compressed, glabrous, Icafj. Leai-PS alternate, opposite 

 or crouded at the joints, acute, glabrous, with a sheath at ba>e, 

 i shorter than the joints, ."ilipules ovate, membianaceotis. Floicere 

 sessile, in fccicles 5— 10 flowcictl. Li>aves of the calyx subulate, 

 carinate, very acuto, tbe interior nearly twice as lon-j as the exterior. 

 Slamens 3, longer than the calyx. ^Y/^-nms' shorter tli^^n the stamens. 

 Cajjside obloii-, obtuse, 3 arii^lfd. 



Very difiercHt in habit IVom tUe rest of this genus. 



Grows in muddy »uils ; verj common. 



Flowers May —July. ^ 



10. ACUMINATUS? M 





k^ 



a. foii 



k 



articiilatis ; pankula de- like joints ; panicle de- 

 coinposita,capitulis 6—9 | conipoflnd, heads 0— y 

 floris; calycis toliolis s^iih- i llowered ; leaves of the 



mucronatis: brae- calvx subul 



m 



I 



teis aristatis, calycem (eic I i.ate ; bri^clcas awned 

 sequantibus. E. j nearly as long 



Mich. 1. p. 192. Pursh, 1. p. 23 

 J. uodosus .= Walt. p. 124. 



Twnt perennial, ccspitosc. Stan 1—2 feet.hi'j;h, terete, glabrous, 

 ^vlth regular joints like the grasses, but the intervals not nodose, like 

 the leaves. Leaves iaw, gh(.rtor than the stem, with a short opea 

 sheath at base. Fanicle souicwhal Irichotnmoiis. Leaves of the catyx 

 nearly equal, very acute, somewhat rigid, the 3 exterior slightly keel- 

 ed Bracieas membranaceous, larger than usual. Stamens -3. Capi 

 mle 3 angle<l, nearly acute, as long as the calyx. 



Grows in dump and wet places. 



Flowers Marcii — May. 



I am not certain that this is the J. acuminatus of Michaux; it is 

 not the J. Sylvaticus of \\illdeno\y. 



11. PuLYCEPHALOS. Mlcb. f^' . 



J. foliis glddiaiis, nodoso- 

 articulatis ] panicula de- 



U 3 



Leaves sword sliaped, 

 with knot- like joiiitB j 



