188 HEXANDRIA—DIGYNIA. Oxyria. 



Alsine rotundifolia, sive Portulaca aquatica, Ger. Em. 614./. 



A. palustris minor serpillifolia. Bauh. Pin. 251. Prodr. 1 18. 



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, axillary, 

 solitary, nearly sessile, reddish. Pet. generally almost concealed 

 by the calyx, very fugacious, often altogether wanting. 



HEXANDRIA DIGYNIA. 

 203. OXYRIA. MoLintam-soriel. 



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

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



Nat. Ord. Holeracecc. Linn. 12. Polygonea. Juss. 28. 

 iV. 204 the same. 



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

 nent leaves. Pet. 2, altei'nate with the calyx-leaves, and 

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

 shaped, shorter than the calyx. Anth. 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. Stem pa- 

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



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



O. reniformis. Hook. Scot. 111. 



Rumex digynus. Linn. Sp. Pl.ASO. Willd. v. 2. 258. FL Br. 395. 



Engl. Bot.v.]3.t.9l0. Huds.l56. With.357. Lightf.]90. Fl. 



Dan.t.]4. Gccrtn. v. 2. ISO. t.l\9. 



