OXALIDACEAE. 



[Vol.. II. 



3. Oxalis corniculata L. Yellow Pro- 

 cumbent Wood-sorrel. (Fig. 2252.) 



Oxalis corniculata L. Sp. PI. 435. 1753. 



Annual or perennial from creeping rootstocks, 

 pubescent with appressed hairs or nearly glabrous, 

 freely branching from the base and with a few 

 branches above; stem i'-6 f high, the branches 

 diffuse, mainly procumbent and often rooting 

 from the nodes. Leaflets obcordate, wider than 

 long, about ^' wide; petioles slender, dilated at 

 the base into oblong rounded or truncate stipules; 

 peduncles i-3-flowered; flowers yellow, 2"-6" 

 long; pedicels strigillose, more or less reflexed; 

 capsule oblong, gradually narrowed to the apex, 

 5 // -9 // long; appressed pubescent; seeds com- 

 pressed, transversely ridged. 



In ballast about the eastern sea-ports, and fre- 

 quently growing on the ground in greenhouses. 

 Texas and throughout tropical America. Recently 

 found in Ontario. Occurs also in warm and tropical 

 regions of the Old World. Ladies' Sorrel. Feb. -Nov. 



4. Oxalis'filipes Small, n. sp. Slender Yel- 

 low Wood-sorrel. (Fig. 2253.) 



Annual or perennial, very slender, sparsely pu- 

 bescent with appressed hairs ; stem erect, nearly 

 simple, usually very leafy, wiry, io'-2 high. Leaves 

 X'-ft' wide, long-pctioled, not stipulate, or the 

 stipules represented by a narrow dilation of the base 

 of the'petiole; leaflets obcordate, with unequal sides, 

 peduncles slender, equalling or exceeding the leaves, 

 2-3-flowered; flowers yellow, in umbel -like cymes; 

 pedicels very slender, strigillose or glabrate, recurved 

 in mature fruit; sepals oblong-lanceolate, 2" long, 

 obtuse with a tuft of hair at the apex; petals .} " long, 

 emarginate; capsule 4"-6" long, gradually narrowed 

 to the apex, often curved; seeds o bo void or oblong, 

 W long, with continuous ridges. 



In'woods, Virginia to Tennessee, south to Georgia and 

 Tennessee. Plant smaller than the preceding, with the 

 leaflets often dark -margined. May-Aug. 



5. Oxalis stricta L. Upright Yellow 

 Wood-sorrel. (Fig. 2254.) 



Oxalis stricta L. Sp. PI. 435'. 1753. 



Oxalis corniculata var. stricla Sav. in Lam. Encycl. 



4: 683. 1797. 



Annual, or perennial, usually low and erect, pale 

 green. Stem commonly branched at the base, 

 the branches spreading, $'-6' long, more or less 

 strigose; leaves <)"-!%' broad; leaflets coarsely 

 cellular, very sensitive, closing when touched; 

 petiole-bases narrowly dilated; flowers yellow, 

 fragrant, in umbel-like cymes, peduncles i^ / -6 / 

 long, stout; pedicels at length deflexed; sepals 

 linear or lanceolate, about 2%." long, ciliolate, 

 erect or ascending; petals 4 // -5 // long, commonly 

 reddish at the base; capsule columnar, 8 // -i5 // 

 long, abruptly narrowed at the summit; seeds obo- 

 void, or elliptic, about >" long, with interrupted 

 transverse ridges. 



In woods and fields, Nova Scotia to Dakota and 

 Colorado, south to Florida and Texas. Introduced 

 into Europe as a weed. April-Oct. 



