352 HEXANDR1A TRIGYNI* 



177. TR1GLOCHIN. Arrow-grass. 



T. maritimum : fruit ovate-oblong, of 6 united capsules. 

 HAB. Salt marshes and about salt springs. July Aug. 1}.; leaves 

 rad., narrow, rujh-like ; spike very long. 



178. GYROMIA. Indian Cucumber. 



G. virginica. 



HAB. Moist woods. May June, QJ. ; root tubular, stem simple 

 leaves verticillate ; Jlower yellow. 



179. TRILLIUM. Wake-Robin. 



T. erythrocarpum : peduncles somewhat erect ; petals oval lanceolate, 

 acute, recurved, nearly as long again as the narrow calyx ; leaves 

 ovate, acuminate, rounded at the base ; abruptly contracted into a 

 short petiole. 



HAB. Sphagnous swamps. May, 7J. ; stem 8 inches high ; Jlower 

 white, with purple veins. 



T. cernuum : peduncle recurved ; petals lanceolate, acuminate, flat, 

 recurved, of the length and breadth of the calyx ; leaves dilated 

 rhomboid, abruptly acuminate, on short petioles. 



HAB. Shady woods. May, 'ZJ.; stem 1218 inches high ; Jlower 

 white ; berry large, purple. 



T. erectum : peduncle inclined ; flower nodding ; petals ovate, acu- 

 minate, flat, spreading, broader and a little longer than the calyx ; 

 leaves broad-rhomboid, acuminate, sessile. 



HAB. Rich soil, among rocks. May, 7|_; afoot high; Jlower large, 

 dark purple. 



180. RUMEX. Dock. 



* Flowers all perfect ; valves graniferous. LAPATHUM. 

 t Valves entire. 



R. aquaticus : valves ovate, entire, all of them graniferous ; leaves 



lanceolate, all of them cordate at the base. 

 HAB. Wet places. June. Root large, astringent ; stem 3 4 feet 



high; grains linear. 

 R. crispus : valves very large, cordate, entire, reticulate, graniferous ; 



leaves lanceolate, undulate, acute. 

 HAB. Meadows. June. Root yellow ; stem 2 3 feet high ; grains 



unequal. . 

 R. sanguineus : valves oblong, small, one of them graniferous ; leaves 



lanceolate, subcordate. 



HAB. Fields. June. Stem 2 3 feet high ; leaves mostly variega- 

 ted with red. . 

 R. Britannica : valves all entire and graniferous ; whorls of flowers 



leafless ; leaves broad-lanceolate, flat, smooth ; sheaths obsolete. 

 HAB. Wet places. June. Root large, dark ext., yellow int. ; stem 



2 3 feet high.%. 



