(311 ) 
OXY'Rl A.* *. 
Linnean Class and Order. II f.xa'ndria f, Digy'nia. 
Natural Order. Polygo'nE/F,, Juss. Gen. PI. p. 82. — Sm. Gr. 
of Bot. p. 90. — Lindl. Syn. p. ‘209. ; Introd. to Nat. Syst. of Bot. 
p. 169. — Kich. by Macgilliv. p. 424. — Loud. Hort. Brit. p. 531. — 
Mack. FI. Hibern. p. 220. — Hook. Brit. FI. (4th edit.) p. 417. — 
Querneales; sect. Rumicina-: ; type, Polygon a CE.E ; Burn. 
Outl. of Bot. v. ii. pp. 523, 587, & 596. — Holerace.e, Linn. 
Gen. Char. Perianthium% (fig. 1.) inferior, of 4, somewhat 
inversely egg-shaped, permanent sepals; the two inner ones (petals 
of Sm.) rather largest. Corolla none. Filaments (see fig. 2.) 6, 
awl-shaped, shorter than the perianth. Anthers upright, of 2 ob- 
long lobes. Germen (fig. 3.) superior, egg-shaped, compressed, 
with membranous edges, cloven at the summit. Styles (see fig. 3.) 2, 
one from each point of the germen, very short, reflexed. Stigmas 
in many fine, tufted segments. Nut (fig. 4.) 2-edged, with a di- 
lated, nearly orbicular, flat, vertical, membranous, cloven, un- 
dulated wing. Embryo in the centre, straight. 
Distinguished from other genera, in the same class and order, by 
the pcrianthium of 4 sepals ; the compressed nut, with a broad 
membranous margin ; and the upright, inverted embryo. 
Only one species known. 
OXY'RIA RENIFO'RMIS. Kidney-shaped-leaved Mountain 
Sorrel. Welsh Sorrel. 
Spec. Char. 
Hook. Fl. Scot. p. 111. — Curt. Brit. Entom.. v. xv. t. 714. — Sprcng. Syst. Veg. 
v. ii. p. 135. — Sm. Engl. Fl. v ii. p. 188. — With. (7th edit.) v. ii. p. 453. — Lindl. 
Syn. p. ‘ill. — Hook. Brit. Fl. p. 167. — Macr. Man. Brit. Bot. p. 199. — Walker’s 
Fl. of Oxf. p. 101.— Dick. Fl. Abred. p. 34.— Mack. Catal. of 1*1. of Irel. p. 34. ; 
Fl. Hiber. p 223. — Oxyria digyna, Dec. Bot. Gall. p. 403. — O. acida, Brown. — 
O. rotundifolia, Gray’s Nat. Arr. v. ii. p. 277. — Rumex diyynus, Engl, Bot. 
t. 910. — Linn. Sp. PI. p. 480. — Huds. Fl. Angl. (2nd ed. ) p. 156. — Sin. Fl. Brit, 
v. i. p. 395. — Willd. Sp. PI. v. ii. pt. I. p. 258. — Lightf. Fl. Scot. v. i. p. 190. — 
Rheum diyynum, Wahlenb. Fl. Lapp. p. 101. t. 9. f. 2. — Acetosa rotundifolia 
repens Eboracensis, folio in medio deliquiumputicnte, Ray’s Syn. p. 143. 
Localities. — Abundant in mountain bogs, rills, moist clefts of rocks, and 
within reach of (he spray of cascades. — Cumberland ; By Black Lead Mine, 
in Borrowdale: Mr. Hutton. In a ravine of the Screes near Wastwaler : Mr. 
Wood. Ashness Gill ; Vale of Newlands; and Black Rocks of Great End: 
Mr. Watson, in N.B.G. — Westmoreland ; On the mountains, and very ele- 
vated spots: Sir J. E. Smith. By the side of a vvateifall near Buckbarrow Well 
in Longsleddale : N. .1. Winch, Esq. Striden Edge, Helvellyn: N. B. G. — 
Yorksh. Mountains of the North and West Ridings: Teesdale. — WALES. 
Caernarvonshire ; Cwm Idwel ; Clogwyn v Garnedd; and Crib y Ddescil: 
Mr. Ghiffith. Moist rocks near Llyn Fynnon l.as : 0. Turner, Esq. Shore 
of Llyn Idwel), and rocks above: Mr. Watson, in N.B.G. Gravelly shore 
ol Llanberris Lake, stunted: J. E. Bowman, in N.B.G. Snowdon: C. C. 
BABiNOTON.ibid. — Merionethsh. By the rivulets above Llyn yCai: Mt-Maiityn. 
Fig. 1. Pcrianthium. — Fig. 2. A separate Flower. — Fig. 3. Germen, Styles, and 
Stigmas. — Fig. 4. Fruit, or Nut. — Fig. 5. A Seed. — Fig. 1. slightly magnified. 
* From oxus, Gr. sharp or acid ; from the acid flavour of this, as of many 
other plants belonging to the same natural family. Hooker. 
t See folio 33, note t. J See folio 33, note f. 
