218 DECANDRIA, PENTAGYNIA. 



O. ambigua, Salisb. in Act. Soc. Linn. Loud. 2. t. 



23. f. 4. 

 O. corniculata, Fl. Dan. t. 873. 



Icon. Jacq. oxal. t. 4. (Pursh.) 



Likewise known by the name of sorrel. In similar places 

 with No. 2, which it resembles very much. Perennial. June, 

 July. 



220. PENTHORUM. Gen. pi. 790. (Sempewiva.) 



Calix 5 to 10 cleft. Petals 5 or wanting. 

 Capsule with 5 cusps, and 5 cells, cells 

 dividing transversely, many- seeded ; seeds 

 minute. — J\Putt. 



slides. 1. P. stem branched, angular; leaves lanceolate, 

 subsessile, unequally deeply serrate ; spikes ter- 

 minal, paniculate, alternate and cymose ; seeds 

 scrobitbrm. — Willd. and Pursh. 

 Icon. Act. Ups. 1744. t. 2. 



American Penthorum. 



About twelve inches high; flowers pale-yellow. In ditches 

 and swamps, or boggy-ground, common. Perennial. June, 

 July. 



221. SEDUM. Gen. pi. 789. (Semper viva.) 



Calioc 5-cleft. Petals 5. Five nectariferous 

 scales at the base of the germ. Capsules 

 5, superior, many-seeded; opening inter- 

 nally. — Nutt. 



tematum. i. S. small, repent; leaves flat, rotund-spathu- 

 late, ternate; cymes sub-3-spiked, flowers ses- 

 sile, octandrous. — Mich, 



S. saxatilis, floribus albis, &c. Clayt. Virg. 891. 



S. Amerianum, Herb. Banks. 



