384 



JUXCACEAE. 



5. Juncus Balticus \Yillcl. Baltic Rush. 

 (Fig. 923.) 



Juncus Balticus Willd. Berlin Mag. 3: 298. 1809. 



Stems erect, 8 / -36 / high, W-\yi" thick, arising 

 at intervals from a stout creeping rootstock \ fr -\y-i rf 

 thick; basal leaves reduced to bladeless sheaths; 

 panicle commonly i / -2^ / high; perianth i^'^X" 

 long, its parts lanceolate, acute, or the inner some- 

 times obtuse, nearly equal, brown with a green mid- 

 rib and hyaline margins; style y-t"-\ ff long; stigmas 

 a little shorter; stamens 6, about two-thirds the 

 length of the perianth; anthers about %" in length, 

 much longer than the filaments; capsule about as 

 long as the perianth, pale to dark brown, narrowly 

 ovoid, conspicuously mucronate, 3-celled; seeds 

 usually with a loose coat, nearly ^ // long, oblong 

 to narrowly obovoid, oblique, about 4o-striate. 



On shores, Labrador to Alaska, southern New York, 

 Ohio and Nebraska; far south in the western moun- 

 tains. Also in Kurope and Asia. Variable. 



6. Juncus Roemerianus Scheele. Roemer's Rush. (Fig. 924.) 



Juncus Roemerianus Scheele, Linnaea, 22: 348. 1849. 



Stems 2o / -4 tall, erect, arising singly from a 

 tough scaly horizontal rootstock 2^' / -5 // thick; 

 inner sheaths bearing erect blades of about the 

 same length as the stem; inflorescence 2^ / -6 / 

 high, diffusely spreading, its leaf 4 / -io / long; 

 heads 2-6-flowered; perianth pale brown, i // -i^ // 

 long, the parts linear-oblong, the outer acuminate, 

 the inner shorter and bluntly acute; flowers imper- 

 fectly dioecious; stamens 6, on fertile plants re- 

 duced to sterile staminodia; capsule brown, about 

 as long as the perianth, narrowly obovoid, obtuse 

 or truncate, mucronate, 3-celled; placenta very 

 thick and spongy, about one-third as broad as the 

 valve; seed dark brown, W~W long, obovoid, 

 abruptly apiculate, indistinctly reticulate or dis- 

 tinctly 2o-26-ribbed and the intervening spaces im- 

 perfectly cross-lined. 



In brackish marshes, New Jersey to Texas. Long 

 confused by American authors with the following species. 



7. Juncus maritimus Lam. Sea Rush. (Fig. 925.) 



Juncus tnaritiiniis Lam. Encycl. 3: 264. 1789. 



Stems 20 / -4o / high, i // -2 // thick, erect from a stout 

 horizontal rootstock. Outer basal leaves reduced to 

 bladeless sheaths, the innermost foliose, with a long 

 terete stout blade about equalling the stem; leaf of the 

 inflorescence erect, sometimes i long, sometimes 

 barely exceeding the panicle; panicle 3'-S' high, its 

 branches stiff, erect; heads 2-6-flowered; perianth 

 i^ // -i^ // long,its parts green, lanceolate, with hya- 

 line margins, the outer acuminate, the inner a little 

 shorter; flowers perfect; stamens 6, two-thirds as long 

 as the perianth; filaments about as long as the anthers; 

 capsule i% /f -i%" long, narrowly ovoid, acute, mu- 

 cronate, brown above, 3-celled, with thin placentae; 

 seed brown, about %" long, the body narrowly and 

 obliquely oblong, about W in length, 2o~3o-ribbed, 

 indistinctly reticulate, tailed at either end. 



Coney Island, New York. Common on the coasts of 

 the eastern hemisphere. 





