150 Juncaceae. 



\,— J UNCUS. 



Leaves smooth cylindrical, perianth chaffy outer segments with a keel, 

 ovary 3-celled, seeds many minute somewhat rough. 



Leaves none, 561 



Leaves present, 562 



561 Stem soft with continuous pith, 



561 Stem rigid with interrupted pith, . 

 562 Stems leafy, 563 



562 Leaves all radical, 565 



563 Leaves jointed internally, 



563 Leaves flat or grooved not jointed, 

 564 Perianth segments obtuse, . . . . . .J- obtusiflorus. 



564 Perianth segments acute, J. articulatus. 



565 Stem tufted round, flowers 3 terminal, . . J. triglumis. 



565 Stem compressed, cyme terminal branched, . J. squarrosus. 



566 Under 8 inches in height, J. bufonius. 



566 Stem I — 2 ft. high, ...... J. compressus. 



JUN'CUS COMMU'NIS (no). Common Rush. 7—8. Stem soft 

 {1435) I — 3 ft. high with continuous pith, leaves all reduced to sheaths, 

 (1436) panicle spreading or globose many-flowered about half-way up the stem, 

 stamens 3. Wet places. 



JUN'CUS GLAU'CUS (89). Hard Rush. 7—8. Stem rigid glaucous 



(1433) I — 2 ft. high with interrupted pith, panicles lateral lax much-branched, 



(1434) stamens 6. Wet places. 



JUN'CUS ARTICULA'TUS (109). Jointed Rush. 6—8. Stem i— 2 ft. 



(1439, 1442, high slender hollow with internal joints, leaves slightly com- 



1443) pressed, panicle terminal. Bogs^ especially in 7nountain districts. 



Jun'cus triglu'mis (21). Three-flowered Rush. 7 — 8. Stems tufted round 

 (1446) slender and wiry 6 — 12 in. high, leaves all radical subulate channelled, 

 cyme 3-flowered terminal. [G. ( Whernside. ) 



Jun'cus obtusiflo'rus (36). 7 — 8. Stems 2 — 3 ft. not tufted, leaves few 

 (1440) terete, panicle terminal corymbose, perianth -segments obtuse as long 

 as the ovoid mucronate capsule. [W. CI. 



JUN'CUS SQUARRO'SUS (105). Heath-Rush. 6—7. Leaves 3—7 

 (1427) in. all radical crowded rigid triangular, stems densely tufted, cyme 

 terminal. Moorlaitds. 



JUN'CUS BUFO'NIUS (112) Toad-Rush. 7—8. Stem slender 

 (1425) branched leafy 2 — 8 in. very pale jointed, leaves few angular bristle- 

 like. Watery places. 



