506 JUNCUS. [CLASS VI. ORDER I. 



***** Barren stems tvanting ; leaves channelled ahove, tvithout distinct 

 internal partitions. Injlorescence terminal, corymbose panicles, or 

 solitary remote Jioivers. Seeds not appendiculated. 

 a. Stems leafy. 



16. /. compres'sus, Jacq. (Fig. 577.) Round fruited Rush. Stem 

 evect, compressed, leafy to the middle ; leaves linear, compressed, 

 channeled ; panicle terminal, compound, sub-corymbose ; perianth of 

 six equal ovate oblong incurved pieces, rather shorter than the roundish 

 ovate capsule. 



English Flora, vol. ii. p. 165. — Hooker, British Flora, vol. i. p. 167. — 

 Bicheno in Tr. of Linn. Soc. vol. xii. p. 207. — Lindley, Synopsis, p. 

 274. — /. lulhosus, Linn. — English Botany, t. 934. 



Root of numerous stout branched fibres, and stout creeping under- 

 ground stems. Stems erect, from six to twelve inches high, smooth, 

 compressed, leafy at the base, and with a solitary leaf about the middle. 

 Leaves linear, bristle-shaped, striated, and channeled above from the 

 incurved margins, rounded at the back, somewhat compressed, smooth, 

 and dilated at the base into a thin sheath, with membranous margins, 

 scarcely auriculated above, those of the stem striated, but the radical 

 ones smooth. Panicle terminal, compound, sub-corymbose, erect, of 

 several roundish smooth branches, the first stouter and longer than the 

 others, nearly as long as the leafy slender bractea, which is channeled, 

 dilated, striated, and sheathing at the base. Perianth of six ovate 

 oblong pieces, nearly equal, concave, with a broad green three ribbed 

 keel, and dark brown shining margin, the three outer ones with the 

 points incurved, the three inner flatter, more obtuse at the point, and 

 paler, with a dilated thin membranous margin. Stamens nearly as 

 long as the perianth, with slendev filaments and yellow oblong anthers, 

 twisted. Style as long as the stamens. Stigmas spreading. Capsule 

 roundish, ovate, obscurely triangular, with an obtuse point, terminating 

 by the short base of the style, three celled, three valved, and many 

 seeded, of a pale brown colour, rather shorter than the perianth. 



Habitat. — Wet marshy places ; frequent. 



Perennial ; flowering in A ugust. 



17. /. cceno'sus, Bicheno. (Fig. 578.) Mud Rush. Stem erect, com- 

 pressed, leafy to the middle ; leaves linear, channeled ; panicle ter- 

 minal, cymose longer than the bractea, few flowered ; i)erianth of six 

 equal oblong obtuse incurved pieces, rather longer than the roundish 

 oblong capsule. 



Bicheno in Tr. of Linn. Soc. vol. xii. p. 309. — English Flora, vol. ii. 

 p. 166.— English Botany, Suppl. t. 2680.— Lindley, Synopsis, p. 274.— 

 J. compressus, var. /3. in Hooker Flora, Scot. vol. i. p. 107, and British 

 Flora, vol. i. p. 167. — J. Gerardi, Lois, notic. p. 60, and Fl. Gall. ed. 

 2. p. 260.— Koch. Fl. Germ, et Helv. p. 731.— J. boihnicus, Wahlen- 

 berg Fl. Lapp. p. 82. t. 6. 



This species, though nearly allied to the above, is always found in 



