HEXANDRIA— TRIGYNIA. Tofieldia. 197 



common R. Acetosa, with divaricated lobes to the leaves. Welsh 

 specimens require to be examined. It is reported that several 

 species have, in Germany, been confounded under the present j 

 but I know not on what their distinctions depend, nor whether 

 we possess more than one in Britain. Professor Hooker appears 

 to describe a different plant from mine. 

 What Mr. Wilson has sent me from near Bangor, named R. ari- 

 folius with a mark of doubt, is certainly not so, nor can I find 

 more than a slight difference in size, none in character, between 

 this Welsh plant and the common R. Acetosa, gathered in Berk- 

 shire and elsewhere. 



10. R. Acetosella. Sheep's Sorrel. 



Flowers dioecious. Leaves lanceolate, hastate. Permanent 

 petals without tubercles. 



R. Acetosella. Linn. Sp. PL 481 . fVilld. v. 2. 260. Fl. Br. 396. 

 Engl. Bot. V. 24. t. 1 674. Curt. Lond.fasc.5. t. 29. Hook. Scot. 

 113. Ehrh.Pl.Off.404. 



Lapathum n. 1596. Hall. Hist. v. 2. 274. 



L. acetosum repens lanceolatum. Raii Syn. 143. 



Oxalis sive Acetosa minor, Matth. Valgr. v. ]. 406./. Camer. 

 Epit. 23 1, f. 



O. tenuifolia. Ger. Em. 397./. 



O. minor. Ibid. 398./. 



O. tenuifolia sinuata vervecina. Lob. Ic. 291./. 



O. parva auriculata repens. Baiih. Hist, v, 2. 992./. 



In dry gravelly pastures and fields, abundantly. 



Perennial. June, July. 



Not half the size of the last. Roots creeping. Stems wavy, branch- 

 ed, slender, leafy, often decumbent. Leaves more or less stalk- 

 ed ; the lower ones hastate, with narrow spreading lobes, entire j 

 upper for the most part simply lanceolate ; in autumn they all 

 turn red. Fl. small, separated, on different roots, in numerous, 

 whorled, leafless clusters. Pet. oblong, entire, all destitute of 

 tubercles. Seed light brown, polished, with 3 blunt angles. This 

 herb is acid, with some astringency, like the preceding, but its 

 much smaller bulk causes it to be generally neglected. 



205. TOFIELDIA. Scottish Asphodel. 



Huds. 157. Fl. Br. 397. Tr. of L. Soc. v. 12. 238. DeCand. Fr. 



V.3. 193. 

 Anthericum. Linn. Gen. ed. 1. 106. 

 Narthecium. Juss. 47. Lam. t. 268. 



Nat. Ord. Coronaricc. Linn. 10. Asphodeli. Juss. 16. Me^ 

 lanthacece. Br. Pr. 272. Hook. Scot. 182. 



