BUCKWHEAT FAMILY 231 



anth. Sheep Sorrel. Waste places, old fields, etc.: Lab. — Fla. — Calif, 



Alaska.; nat. from Eu. Plain — SubmonL Aj>"Au. 



2. R. Acetosa L. Perennial^ with a short rootstock; stem erect, 3-10 dm. 

 high; leaf-blades oblong-hastate or ovate-sagittate, 3-12 cm. long, acute at the 

 apex, with acute auricles, the basal ones petioled, the upper cauline ones sessile; 

 perianth green, 2 mm. long, in fruit winged, broadly ovate or orbicular, cordate, 

 5 mm. long, with delicate callosities at the base. Sour Dock. Waste places: 

 Lab. — N.Y. — Mont. — Alaska; adv. from Eu. Plain — SubmonL Je-Au. 



3. R. paucifolius Xutt. Perennial, with a taproot and short rootstock, 

 somewhat tufted; stem 2-5 dm. high; leaf -blades lanceolate or oblanccolate or 

 sometimes elliptic, the lower petioled, 5-12 cm. long, the upper sessile; perianth 

 yellowish green or reddish, 1.5 mm. long; divisions winged, in fruit about 4 mm. 

 in diameter, rounded, sometimes with a small basal callosity. li. Geyeri (IMeisn.) 

 Trelease. ^Meadow^s: Alta.— Colo. — Calif. — B.C. Submont.—Moni. My-Au. 



4. R. venosus Pursh. Stem stout, erect or decumbent at the base, 1.5-4 

 dm. high, somewhat fleshy; leaf-blades ovate, ovate-lanceolate, or oblong, 3-12 

 cm. long, fleshy, somewhat glaucous; panicle rather dense, conic; perianth red, 

 pedicelled, about 5 mm. long; inner lobes in fruit much enlarged, orbicular, 2-5 

 cm. broad, venose, cordate at the base; achene 7 mm. long. Wild Begonia, 

 Sour Greens, Wild Hydrangea. Sandy soil: Sask. — Mo. — Nev. — ^Wash. 

 — Alta. Plain — Submont. Ap-Je. 



5. R. salinus A. Nels. Stem stout, 2-4 dm. high, glabrous; leaf-blades 

 moderately thick, somewhat crisp, the lower oblanceolate-oblong, 10-15 cm. 

 long, the upper lanceolate; perianth red, about 3 mm. long; inner lobes in fruit 

 enlarged, renifonn-cordate. R. tuberosus A. Nels. Alkaline soil: w Wyo. — 

 Colo. Subinont. Je. 



6. R. hymenosepalus Torr. Stem 3-10 dm. high, glabrous; leaf-blades 

 somewhat fleshy, somewhat crisp, 5-20 cm. long, elliptic or oblanccolate; perianth 

 yellowish green, 3-4 mm. long; inner lobes in fruit much enlarged, cordate, 

 longer than broad, with an open sinus. Dry or sandy soil: Tex. — Okla. — Utah 

 — Calif.; n Mex. Son.—Mont. Mr-My. 



7. R. praecox Rydb. Stem 2-3 dm. high, striate; basal leaves petioled, 

 rather thick, oval or elliptic, 4-10 cm. long, rounded at both ends; perianth-lobes 

 oval, rounded at the apex, the inner 3-5 mm. long, without tubercles. Along 

 streams, in the mountams: Colo. — Wyo. Mont. Je. 



8. R, hesperius Greene. Stem 3-6 dm. high; leaf-blades lanceolate or 

 linear-lanceolate, slightly wart> ; panicle small; perianth purplish or greenish, 3 

 mm. long; inner lobes in fruit 4-5 mm. long, deltoid or reniform-^leltoid, more 

 or less reticulate, denticulate on the margins. Bottom lands: Alta. — Wyo.— 

 Wash. Submont. My-JL 



9. R, confinis Greene. Stem stout, 4-15 dm. high; blades of the basal 

 leaves 1-3 dm. long, oblong-lanceolate to oblong-ovate, cordate at the base; 

 panicle large; flowers greenish; perianth 4 mm. long; inner lobes suborbicular or 

 rounded-cordate, crenate-dentate, rather strongly reticulate. Wet places: B.C. 

 ^-Mont. — Wash. Son. Je-Jl. 



10. R. occidentalis S. Wats. Stem 5-20 dm. high; blades of the basal 

 leaves oblong-lanceolate, truncate or subcordate at the base, 1-3 dni. long; 

 panicle narrow, elongate; perianth greenish, 3-4 mm. long; inner lobes in fruit 

 broadly cordate, denticulate towards the base; achenes 3 mm. long. K. 

 polyrrhizus Greene, in part. Wet places: Lab.— X.D.—N.M.— Calif.— B.C. 

 Plain—MonL Jl-Au. 



11- R. densiflorus Osterh. Stem 5-10 dm. high, grooved; blades of the 

 basal leaves elliptic or oblong-lanceolate, cordate at the base, 1.5-3 dm. long, 

 10-15 cm. wide; flowers polygamous; perianth often red, 3 mm. long; mner 

 lobes broadly ovate-cordate, reticulate. R, Bakeri Greene. W et ground: Colo. 

 —Wyo.— Ida. Plain— Mont: Jl-Au. 



12. R. subalpinus M. E. Jones. Stem erect, sulcate, 1-2 m. high; blades 

 of basal leaves 2-4 dm. long, 5-20 cm. wide, oblong-lanceolate to eUiptic, entire, 



