HEXANDRIA MONOGYNIA. 347 



HAB. Rocky woods and mountains. Apr. May, 7J. ; a foot high 

 smooth, mostly 2-leaved ; flower sm., greenish-yellow ; seed large, 

 dark blue. 



158. BERBERIS. Barberry. 



B. canadensis : branches punctate, armed with trifid spines; leaves 

 oblong-ovate, distinctly ciliate-serrate ; racemes simple, subcorym- 

 bose, recurved. 



HAB. Rocky hills. May June. Shrub 34 feet high; leaves 

 altern. ; Jilam. irritable ; Jl. yellow ; berry red, acid. 



159. PRINOS. Winterberry. 



?. verticillatus : leaves deciduous, oval, serrate, acuminate, pubescent 

 beneath; flowers 6-parted, dioecious; staminiferous axillary, sub- 

 umbellate ; pistiliferous aggregated. 



EAB. Moist woods and swamps. June. Shrub 6 8 feet high; 

 leaves alt. ; Jl. white ; berry scarlet. 



160. ALLIUM. Onion, $c. 



A. canadense: scape naked, terete ; leaves linear ; head bulbiferous. 

 HAB. Meadows. May, 9|; root bulb.; leaves long, Jlat above; 



Jl. numerous, pale rose-col. 

 A. triflorium: scape naked, terete, shorter than the leaves; leaves 



lanceolate, nerved, umbel few-flowered. 

 HAB. Mountains. May June. 



161. HYPOXIS. Star-grass. 



H. erecta: hairy; scape 2 4-flowered; leaves linear; segments of 



the corolla lanceolate-oblong. 

 HAB. Woods and meadows. May June, 7J.; root bulb, solid; 



leaves gramin. ; Jl. yel. 



162. PONTEDERIA. 



P. cor data : leaves oblong-cordate ; flowers in crowded spikes. 

 HAB. In fresh water. Aug. 7J. ; leaves subrad., 34 in. long, 

 thick ; spath. oblong ; Jl. aggreg. blue. 



163. ALETRIS. Star-wort. 



A. fannosa : flowers pedicellate, oblong-tubular; corolla, when de- 

 caying, nearly smooth ; leaves broad-lanceolate. 



HAB. Sandy woods. July, Tj.; roots prcemorse ; leaves rad., 

 spreading ; scape 2 feet high ; Jlower white. 



164. HEMEROCALLIS. Day Lily. 



H. fulva : leaves broad-linear, carinate ; interior petals obtuse, undu- 

 late ; exterior nerves of the petals ramose. 



