188 HEXANDRIA— DIGYNIA. Oxyria. 



Alsine rotundifolia, sive Portulaca aquatica. Ger. Em. 6J4./. 

 A. palustris minor serpillifolia. Bauh. Pin. 251 . Prodr. 118. 

 Anagallis serpillifolia aquatica. Bauh. Hist. v. 3. 372./. 



In watery places, on a gravelly, sandy, or heathy soil, frequent. 



Annual. July, August. 



Root fibrous. Stems prostrate, floating, or creeping, a few inches 

 in length, square, smooth, leafy. Leaves opposite, stalked, ob- 

 ovate, entire, smooth, hardly an inch long. Fl. small, a}(illary, 

 solitarj', nearly sessile, reddish. Pet. generally almost concealed 

 by the calyx, very fugacious, often altogether wanting. 



HEXANDRIA DIGYNIA. 

 203. OXYRIA. Mountain-sorrel. 



" Hill Veg. Syst. v. 10. 24." G<ertn. v. 2. 180, obs. Br. in Ross's 

 Voy. ed. 2. v. 2. 192. Hook. Scot. 99. 



Nat. Ord. Holeracece. Linn. 12. Polygonece. Juss. 28. 

 N. 204 the same. 



Cal. inferior, of 2 opposite, lanceolate, spreading, perma- 

 nent leaves. Pet. 2, alternate with the calyx-leaves, and 

 larger, obovate, obtuse, erect, permanent. Filam. 6, awl- 

 shaped, shorter than the calyx. Antli. erect, of 2 oblong 

 lobes. Germ, superior, ovate, compressed, with membra- 

 nous edges ; cloven at the summit. Styles one from each 

 point of the germen, very short, erect. Stigmas in many 

 fine, tufted segments. Seed 1 , naked, ovate-oblong, com- 

 pressed, with a dilated, nearly orbicular, flat, vertical, 

 membranous, cloven, undulated wing; embryo central, 

 straight. 



Herbaceous, perennial, acid, smooth. Leaves almost all 

 radical, stalked, undivided, with radiating ribs. Stevi pa- 

 nicled. Fl. whorled, on capillary stalks, green. 



1. O. reniforyjiis. Kidney-shaped Mountain-sorrel. 



O. reniformis. Hook. Scot. 111. 



Rumex digynus. Linn. Sp. PL 480. Willd. v. 2. 258. Fl. Br. 395. 



