350 HEXANDRIA MONOGYNIA. 



171. ORONTIUM. Golden club. 



O. aquaticum : leaves lanceolate-ovate ; scape cylindrical, spiked. 

 HAB. In water. May, % ; leaves rad. large spadix yellow. 



172. ACORUS. Sweet-flag. 



A. calamus: spadix protruding from the side of an ensiform leaf. i 



HAB. Swamps. June, Tj. ; root creeping, arom. ; leaves rush-like ; 

 spad. greenish. 



173. JUNCUS. Rush. 



* Scapes naked ; Jlowers lateral. 



J. effusus: scape minutely striate, (soft;) panicle loose, very much 

 branched, spreading ; leaflets of the perianth lanceolate, acuminate, 

 rather longer than the obovate obtuse capsule. 



HAB. Low grounds. June, 1J. ; scape 2 3 feet high ; stam. 3 ; 

 seeds attenuate. 



J. acutus: scape naked, terete, panicle lateral; involucrum 2-leaved, 

 spinous ; capsule nearly round, mucronate, as long again as the pe- 

 rianth. 



HAB. Sandy sea-coast. 1\.. Stem in subdistich. fascic., 2 4 feet 

 high; seeds ang. 



* * Leaves all radical ; (Jlowers terminal.) 



J. tennis : stem erect, filiform, a little dichotomous at the summit, near- 

 ly terete ; leaves setaceous, canaliculate ; flowers solitary, approx- 

 imate, subsessile ; perianth longer than the obtuse capsule. 



HAB. Wet or dry places. June July, 1^.; a foot high; pan. sub- 

 corymb. 



J. nodosus : stem somewhat leafy ; leaves nodose-articulate ; heads 

 mostly 2, globose, one of them lateral and pedunculate, the other 

 sessile; leaflets of the perianth mucronate, shorter than the acumi- 

 nate capsule. 



HAB. Wet places. July, % ; stem 110 inches high ; heads 812- 

 Jl., 1 seds. 



* * * Stems leafy. 

 t Leaves nearly plane, grooved above. 



J. bulbosus : stem simple, leafy, compressed ; leaves linear-setaceous, 

 canaliculate ; panicle terminal, compound, subcymose, shorter than the 

 involucrum ; leaflets of the perianth incurved, obtuse or acute, gen- 

 erally shorter than the ovate, subglobose capsule. 



HAB. Salt marshes. Aug. Sept.TJ.; a foot high, wiry ; caps, dark 

 brown. 



J. bufonius : stem dichotomous above, paniculate ; leaves filiform, se- 

 taceous, canaliculate; flowers subsoh'tary, stssiie, unilateral, leaves 



