156 HEXANDRIA.— MONOGYNIA. 



251. ACORUS. Sweet-flag. Aroidece. 



A. calamus : spadix protruding from the side of an 

 ensiform leaf. 

 HAB. Swamps. June. U. Root creep., arom.: 

 leav. rush-like ; spad. greenish. 



252. JUNCUS. Rush. Juncece. 



* Scapes naked ; flowers lateral. 



J . J. ejfusus : scape minutely striate, (soft ;) paniclejloose, 

 very much branched, spreading ; leaflets of the 

 perianth lanceolate, acuminate, rather longer than 

 the obovate obtuse capsule. 

 IIAB. Low grounds. June. H • Scape 2 — 3ft high; 

 stam. 3 ; seeds attenuate. 



2. J. setaceus : scape filiform, striate, umbel, lateral. 



compound, few-flowered ; peduncles many-flow- 

 ered ; leaflets of the perianth subulate. 

 HAB. Swamps. H. Scape slend., 2 ft. high; pan. 

 small ; caps, acute. 



3. J. acutus : scape naked, terete, panicle lateral ; 



involucrum 2-leaved, spinous ; capsule nearly 

 round, mucronate, as long again as the perianth. 

 HAB. Sandy sea-coast. U . Stem in subdistich.fas- 

 cic, 2 — 3ft. high; seeds ang. 



* Leaves all radical ; {flowers terminal.) 



i. J. squarrosus : leaves setaceous, (rigid,) 'grooved ; 

 panicle terminal, elongated, compound ; capsules 

 elliptical. 

 HAB. New- York. +. 



5. J. tenuis : stem erect, filiform, a little dichotomous 



at the summit, nearly terete ; leaves setaceous, 

 canaliculate ; flowers solitary, approximate, sub- 

 sessile ; perianth longer than the obtuse capsule. 

 HAB. Wet or dry places. June — July. 11. Afoot 

 high, tenacious ; pan. subcorymb. 



6. J. nodosus : stem somewhat leafy; leaves nodose- 



articulate ; heads mostly 2, globose, one of thena 

 lateral and pedunculate, the other sessile ; leaflets 



