JTJNCACE^E. (RUSH FAMILY.) 481 



4. J. setaCCUS, Eostk. Scape slender (2° -3° high) ; panicle loose, rather 

 simple, turning light chestnut-color ; sepals lanceolate, sharp-pointed, especially 

 the 3 exterior, longer than the obovate mucronate-pointed pod. — Penn., Vir- 

 ginia, and southward, near the coast. 



5. J. mai'dtilllllS, Lam. Scape stout and rigid (2° -5° high), the apex 

 pungent; panicle, compound, erect, loose; the flowers clustered in small heads; 

 sepals lanceolate, the outer acute, as long as the elliptical short-pointed pod. 

 (J. acutus, MuhL, &c.) — Brackish marshes, New Jersey (Pursh), Virginia, and 

 southward. (Eu.) 



* # * Stems leaf-bearing: leaves terete, or flattened laterally (equitant), knotted by 

 cross partitions internally : cyme or panicle terminal: flowers in heads or small clus- 

 ters ( very liable to a monstrosity, from the bite of insects making them appear as 

 if vivipai-ous) : pod more or less \-celled. 



-t- Stamens 3. 



6. J. scirpoides, Lam. Stem stout (l°-3° high) aud terete, as are the 

 leaves; panicle rather simple, bearing several (5-18) pale green densely many-flow- 

 ered spherical heads : sejxils rigid, awl-shaped and bristly-pointed, especially the 

 outer, as long as the oblong triangular taper-pointed pod ; seeds barely pointed 

 at each end, tailless. (J. polycephalus, Michx. (excl. var. al). J. echinatus, 

 Muhl. J. nodosus, var. multiflora-, Torr.) — Wet borders of streams, &c. ; 

 rather common. — Rootstock thickish, creeping. Remarkable for its bur-like 

 green heads, usually J' in diameter. 



7. J. paradoxus, E.Meyer. Stem rather stout (1°-2|° high), terete; 

 leaves terete or somewhat flattened ; panicle decompound ; the numerous greenish 

 heads globular, many- (8- 15-) flowered; sepals lanceolate, somewhat awl-pointed, 

 rigid, shorter than the oblong-triangular abruptly short-pointed pod ; seeds con- 

 spicuously tailed at both ends ! (J. polycephalus, Darlingt., Torr. Fl. N. Y. cxcl. 

 var. 3, & syn. J. fraternus, Kunth. J. sylvaticus, Pursh.) — Wet places; com- 

 mon. — Heads less dense, fewer-flowered, and sometimes smaller, than in the 

 foregoing. Remarkable for the loose white seed-coat prolonged at both eiuU 

 into a tail longer than the oblong body of the seed. 



8. JT. delbilis. Stems weak and slender (1°- 2° long), flattened, as are the 

 slender leaves ; panicle decompound, loose, widely spreading ; the numerous pale green 

 heads 4-8-flowered; sepals lanceolate, acute, herbaceous, shorter than the oblong 

 pod ; seeds tailless, minutely aud barely pointed at each end. (J. subverticilla- 

 tus, Muhl., not of Wulf. J. pallcscens, Meucr, as to N. American plant. J. 

 polycephalus, var.? depaupcratus, Torr. Fl. N. Y.) — Wet swamps; common, 

 especially southward and westward. — Roots fibrous. Stems often decumbent 

 or floating and rooting : branches of the cymose panicle slender and diverging. 

 Heads 2" long. Pods pale, sometimes twice the length of the calyx when ripe. 

 — This, which is pretty clearly the J. acuminatus of Kunth, is perhaps the plant 

 of Michaux ; but the next is the species taken for J. acuminatus by American 

 authors. 



9. J. acuminatus, Michx. Stem erect (10'- 15' high), terete, leaves 

 slender, nearly terete; panicle icith rather slightly spreading branches, bearing few or 

 many 3-8-flowtred chestnut-colored heads: sepals lanceolate or linear-lanceolate, 



41 



