ONOGRARLE. 47 



Calyx superior, tubular, with a 4-lobed division ; petals inserted 

 on the throat of the calyx, and equal to the divisions of the calyx ; 

 stamens definite ; style single, with a capitate or 4-lobed stigma ; 

 leaves simple, alternate or opposite. 



OENOTHERA. L. S. 1. 



CE. biennis. L. Scabish. Tree Primrose. Stem 3-5 

 feet high, villous and scabrous ; flowers yellow, in a terminal 

 spike, with obcordate petals ; leaves ovate-lanceolate, alternate, 

 pubescent ; found in fields, and flowers from June to Septem- 

 ber. Roots farinaceous. 



CE. fruticosa. L. Sundrop. Rather shrubby, was found by 

 T. A. Greene, at Plymouth. 



CE. pumila. L. Low Scabish. Is common over dry fields. 



CE. grandiflora. Ait. Garden Scabish. A native of the South- 

 ern States, is cultivated for its flowers ; much resembles the first. 



ISNARDIA. L. 4. 1. 



/. palustris. L. Water Purslane. Stem prostrate, creeping, 

 smooth, with opposite and ovate-lanceolate leaves ; flowers single, 

 axillary, without corolla ; grows in wet places and pools, and 

 blossoms in June. Has a slight resemblance to common Purslane. 



/. alternifolia. DC. Seed Box. Stem 2 feet high or more, 

 branched, smooth ; leaves lanceolate, alternate, slightly scabrous 

 on the margins and under side ; flowers axillary and single ; 

 capsule roundish-obovate, 4-angled, and winged ; grows in swamps, 

 and flowers in July. 



Epiloeium. L. S. 1. 



E. spicatum. Lam. Sweet Willow Herb. Stem 3-6 feet 

 high, leafy, round, smooth, branched above, ending in a raceme 

 of many flowers ; leaves linear-lanceolate and veined ; flowers 

 purple, with irregular petals ; grows along woods and moist 

 hedges, and blossoms in July. This is a very showy plant. 



