Oxalis. GERANIACE^. 365 



short-stalked, about 5 lines long, obliquely emarginate, the terminal mostly larger and cune- 

 ate ; the common petiole longer than the leatiets : flowers about 6 lines long, short-pedicelled, 

 mostly 3 together, at the ends of axillary peduncles about equal to the leaves and very short- 

 bracted at top : sepals lanceolate : petals obovate, thrice as long as the calyx, rounded at 

 apex : capsule ovoid, a little surpassing the sepals ; seeds 1 to 3 in each cell, reddish, fusi- 

 form, somewhat flattened, three fourths line long, with 8 longitudiual zigzag w'ings or rows 

 of teeth. — Bot. Mex. Bound. 41 ; Trelease, 1. c. 87, t. 11, f. 2.— Southern Texas. 



H— •»— -1— Leaves palmately trifoliolate, exstipulate or with short adnate stipules : leaflets 

 subsessile, somewhat obliquely obcordate-cuneate, variously surpassed by the common 

 petiole : capsule several-seeded ; seeds about three fourths line long, reddish brown, ovate, 

 acute at apex, flattened, with 1 to 3 deep marginal grooves aud numerous transverse 

 ridges somewhat interrupted by 2 low longitudiual elevations on each side. 



++ Flowers small, homogone, the styles about equalling the longer stamens. 



= Leafy branches from a stout erect woody candex. 



O. "Wrightii, Gray. About a span high, more or less appre.ssed-villous throughout, cespi- 

 tose, the prostrate and rooting or ascending .slender stems suffrutescent and more or less 

 branched below : leaflets 2 to 5 lines long, often broader ; tlie common petiole somewhat 

 stipular-dilated at base : flowers about 5 lines long, orange-colored, oftendrying with a tinge 

 of blue, 1 to 3 at the ends of (or occasionally distributed along) the elongated axillary pedun- 

 cles, which are short-bracted at top ; the refracted pedicels at length about 8 lines long : 

 sepals lanceolate, mostly obtuse : petals obovate, twice as long as the calyx, usually emargi- 

 nate : capsules oblong, several times as long as the sepals. — PI. Wright, i. 27, ii. 25 ; Torr. 

 & Gray, Pac. R. Rep. ii. 161 ; Torr. Bot. Mex. Bound. 41 ; Trelease, 1. c. 88; Brandegee, 

 Proc. Cal. Acad. Sci. ser. 2, i. 202 ; Parish, Erythea, iii. 60. — Central California to Texas. 

 (Mex.) 



= = Not from a stout caudex, herbaceous. 



a. Without subterranean runners, mostly perennial : inflorescence seemingly umbellate ; 

 pedicels refracted in fruit. 



O. coRNicuLATA, L. Auuual, cespitose, prostrate and rooting at the nodes or ascending ; 

 the slender branches from a span to a foot long, somewliat rough-villous : leaflets 3 to 5 lines 

 long and mostly a little wider ; stipules evident, round-topped or truncate, adnate to the 

 petiole : flowers about 3 lines long, solitary, or usually paired or umbelled ; the shortly 

 bracteate peduncles longer than the leaves ; pedicels elongated : sepals lanceolate to oblong, 

 rather obtuse : petals obovate, about twice as long as the calyx, obscurely crenulate or 

 emarginate ; styles and longer stamens about as long as the sepals : fruit as in the last. 

 — Spec. i. 435; Jacq. Oxal. 16, 30, t. 5; Ell. Sk. i. 525; Zucc. Oxal. 34, & Nachtr. .53; 

 Hook. Fl. Bor.-Am. i. 117 ; Torr. & Gray, Fl. i. 211 ; Reichenb. Ic. Fl. Germ. v. t. 199, f. 

 4896 ; Trelease, 1. c. 88, in part, & Trans. St. Louis Acad. v. 286. 0. pusi/Ja, Salisb. Trans. 

 Linn. Soc. ii. 243, t 23, f. 5. — Occasional on the Atlantic coast, especially southward, and 

 a greenhouse weed everywhere. (Introd. from Eu. and Tropics.) A form with deep red- 

 purple stems and foliage, sometimes cultivated for bedding effect, and more or less persist- 

 ent about gardens, is var. atropurpurea. Planch. Fl. Serres, xii. t. 1205, sometimes known 

 also as var. rubra, var. Inrida, and as 0. tropceoloides. 



Var. Dillenii, Trelease, n. comb. A span or less high, cespitose, mostly suberect, 

 branched from the base, rather stout-stemmed, from a thickish perennial root, appressed gray- 

 strigose : petiole dilated below the pulvinus into an entirely adnate stipular membrane : pedi- 

 cels rather stout and short, or exceptionally elongated and bracteate near the middle : 

 flowers 4 or 5 lines long : petals frequently brown within toward the base : styles sometimes 

 evidently longer than the stamens : capsule relatively large : otherwise like the type. — 

 0. Dillenii, Jacq. Oxal. 15, 28 {O.ri/s liitea Americana humilior et nnnna, Dill. Elth. ii. 298, 

 t. 221, f. 288) ; Pur.sh, Fl. i. 323 ; Zucc. Oxal. 35. ? 0. /areata. Ell. Sk. i. 527. O. cornlcu- 

 laia, Trelease, Mem. Boston Soc. Nat. Hist. iv. 88, in large part. 0. stricta. Small, Bull. 

 Torr. Club, xxiii. 267. — From the Great Lakes to Vancouver, Texas, Florida, and New 

 Jersey. A more erect stouter and more canescent form than the type, appearing specifically 

 distinct in spring, but the more prostrate forms, especially late iu summer, passing into 



