17G HEXANDRIA-MONOGYNIA. Juncus. 



G. junceum articulatum palustre humilius, utriculis frequenter do- 

 natum, Moris, v. 3. 227. sect. 8. t. 9./. 2. 



G. aquaticum. Ger. Em. 13./. 



G. aquaticum alterum. Lob. Ic. 12./. 



In boggy meadows, and watery places, frequent. 



Perennial. July, August. 



Root creeping. Stems erect, or ascending, 12 to 18 inches high, 

 hollow, with a few internal partitions near the bottom only, and 

 with 2, 3 or 4 joints ; most leafy below. Leaves compressed, 

 with numerous internal partitions, giving the same knotty or 

 jointed appearance as in the preceding ; their points a little re- 

 curved. Panicle more erect, its branches strong, elongated, so 

 that the heads oijlowers are remote, one above another, on each 

 simple branch, with veiy few at the forks. Fl. and capsules larger 

 than the last. Bracteas much the same. Calyx-leaves lanceo- 

 late, acute ; 3 innermost rather blunter, of a deeper brown, with 

 a more evident white membranous border. Caps, remarkably 

 large, of a dark chocolate colour, highly polished, as if varnish- 

 ed, ovate- or elliptic- oblong, triangular, with a stout prominent 

 point, extending much beyond the calyx. Seeds small, not tu- 

 nicated. 



In wet seasons, when the seeds are sparingly perfected, the stems 

 throw out large tufts of leaves, as figured by Caspar Bauhin and 

 others, and described by Scheuchzer, p. 333. By these proba- 

 bly the plant is increased. Mr. Davies remarks that such are 

 never found on the preceding or following species. 



22. J. ohtusifiorus . Blunt-flowered Jointed Rush. 



Leaves apparently jointed, cylindrical. Stem with internal 

 partitions. Panicle repeatedly compound ; branches di- 

 varicated and reflexed. Calyx-leaves obtuse, as long as 

 the capsule. 



J. obtusiflorus. TJirh. Calam. 7G. Davies Tr.of L. Soc. v. 10. 13. 

 Co7np. .55. Engl. Bot. v. 30. t. 2144. Bichenn Tr. of L. Soc. v. 1 2. 

 327. 



J. articulatus /3. FL Br. 379, excluding the synonyms. 



J. articulatus var. 5, M-ith. 347. 



J. n. 1323. Hall. Hist. v. 2. 171, excluding the synonyms. 



J. cum glumis albis ; Dood. Not. Dill, in Raii Syn. under n.9. 433. 



In marshes, less common than the two last. 



In Peckham field. Doody. North Wales. Rev. H. Davies. Nor- 

 folk. Mr. Hugh Rose. Near Forfar, rare. Mr. David Don. 



Perennial. August. 



Root somewhat creeping. Plant larger and much taller than the 

 last. Stem and leaves round, not compressed ; the latter rigid 

 and pointed, almost pungent; both furnished with copious, in- 

 ternal, transverse partitions, not visible externally, except in a 



