4 68 



JUNCACEAE. 



VOL. I. 



4. Juncus gymnocarpus Coville. Pennsylvania Rush. Fig. 1169. 



Juncus Smithii Engelm. Trans. St. Louis Acad. 2 : 444. 



1866. Not Kunth, 1841. 

 /. gymnocarpus Coville, Mem. Torr. Club 5: 106. 1894. 



Stems erect, i-2^ high, about i" thick, arising at 

 intervals from a creeping proliferous rootstock about 

 li" in diameter; basal leaves reduced to bladeless 

 clasping sheaths; panicle commonly 7"-is" high, 

 spreading, its subtending leaf usually 4'-io' long; peri- 

 anth i" in length or a little less, its parts with a green 

 midrib, equal, lanceolate, the outer acute, the inner 

 obtuse ; stamens 6, nearly as long as the perianth, the 

 anthers shorter than the filaments; capsule almost twice 

 as long as the perianth, broadly ovoid, conspicuously 

 mucronate, brown and shining, barely dehiscent, 3- 

 celled ; seed obliquely obovoid or oblong, somewhat mis- 

 shapen by compression in the capsule, about 4" long, 

 none with perfect markings seen. 



In swamps, mountains of Schuylkill and Lebanon coun- 

 ties, Pennsylvania, and in Florida. 



5. Juncus balticus Willd. Baltic Rush. 

 Fig. 1170. 



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



Stems erect, 8'-36' high, \"-\\" thick, arising at 

 intervals from a stout creeping rootstock \"-\\" 

 thick ; basal leaves reduced to bladeless sheaths ; 

 panicle commonly i'-2|' high; perianth \\"-2.\" 

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

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

 rib and hyaline margins; style \"-\" long; stigmas 

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

 length of the perianth; anthers about 1" 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 usu- 

 ally with a loose coat, nearly }" long, oblong to 

 narrowly obovoid, oblique, about 4o-striate. 



On shores, Newfoundland and Labrador to Alaska, 

 Pennsylvania, Missouri and Nebraska ; far south in the 

 western mountains. Also in Europe and Asia. Consists 

 of many races. 



6. Juncus Roemerianus Scheele. Roemer's Rush. Fig. 1171. 



Juncus Roemerianus Scheele, Linnaea 22 : 348. 1849. 



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

 tough scaly horizontal rootstock 2j"-s" 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"-if" long, the parts linear- 

 oblong, the outer acuminate, the inner shorter and 

 bluntly acute ; flowers imperfectly dioecious ; stamens 

 6, on fertile plants reduced to sterile staminodia; 

 capsule brown, about as long as the perianth, nar- 

 rowly obovoid, obtuse or truncate, mucronate, 

 3-celled; placenta very thick and spongy, about one- 

 third as broad as the valve; seed dark brown, i"-i" 

 long, obovoid, abruptly apiculate, indistinctly re- 

 ticulate or distinctly 2O-26-ribbed and the intervening 

 spaces imperfectly cross-lined. 



In brackish marshes, New Jersey( ?), Virginia to Flor- 

 ida and Texas. 



