OXALIDACEAE 667 



2. Xanthoxalia Langloisii Small. Similar to 0. corniculata in habit, but rela- 

 tively smaller in all its parts: leaflets pale or light green, the blades 3-10 mm. broad, 

 mostly less than 6 mm. wide, somewhat ciliate and more or less pubescent on the 

 surface: pedicels minutely strigillose: sepals oblong or oblong-lanceolate, 2. 5-4 -mm. 

 long, ciliate nearly all around: petals 5-8 mm. long: longer filaments ciliate above: 

 capsules 9-14 mm. long. 



In woods, sandy bottoms and door yards, Tennessee to Florida and Texas. Throughout 

 the year. 



3. Xanthoxalis filipes Small. Stems more or less tufted on the slender root- 

 stocks, commonly decumbent, strigillose: leaves often irregularly clustered: leaflets 

 bright green, the blades 7-8 mm. wide, or sometimes wider, glabrous or with a few 

 scattered hairs: pedicels strigillose: sepals lanceolate to oblong-lanceolate, 3-4 mm. 

 long, sparingly ciliate mainly at the tip or near it and otherwise sparingly pubescent: 

 petals 5-9 mm. long, light or pale yellow: longer filaments ciliate above: capsules 

 slender, 8-12 mm. long, erect on more or less reflexed pedicels. [Oxalis filipes Small.] 



In woods or sandy soil, District of Columbia to Missouri and Georgia. Spring to fall. 



4. Xanthoxalis macrantha (Trelease) Small. Stems solitary or sparingly 

 tufted on woody rootstocks, erect or decumbent, strigillose: leaves often numerous: 

 leaflets deep or. bright green, the blades 7-12 mm. wide, or some of them smaller, 

 more or less pubescent and commonly ciliate: pedicels strigillose: sepals oblong to 

 oblong-lanceolate, 4-5 mm. long, copiously ciliate all around, and otherwise densely 

 pubescent: petals 10-20 mm. long, golden yellow: longer filaments sparingly ciliate 

 above: capsules stout, 10-14 mm. long, on more or less reflexed pedicels. [Oxalis 

 corniculata var.? macrantha Trelease.] 



In open woods and on shaded banks, Georgia and Florida to Mississippi. Spring to fall. 



5. Xanthoxalis Texana Small. Stems commonly solitary along the woody 

 rootstock, densely strigillose, erect or decumbent, 1-1.5 dm. long: leaves approximate: 

 leaflets bright green, the blades 8-15 mm. broad, more or less densely strigillose and 

 ciliate: pedicels strigillose: sepals oblong, sometimes broadly so, or linear-oblong, 

 4.5-5.5 mm. long, copiously ciliate all around and otherwise densely pubescent: petals 

 12-18 mm. long, golden yellow: longer filaments glabrous: capsules stout, columnar, 

 12-15 mm. long, on reflexed pedicels. 



On plains and prairies, Texas. Spring to fall. 



6. Xanthoxalis stricta (L.) Small. Stems tufted on woody rootstocks, or 

 sometimes from mere annual roots, strigillose, often decumbent: leaves usually 

 numerous: leaflets bright green, 8-16 mm. broad, glabrous or with a few scattered 

 hairs: pedicels strigillose: sepals oblong or linear-lanceolate, 4-6 mm. long, sparingly 

 ciliate, more or less pubescent on the back: petals 5-10 mm. long, pale or yellow: 

 longer filaments glabrous: capsules stout, columnar, 16-30 mm. long. [Oxalis stricta 

 L.] 



In woods, cultivated grounds and on roadsides, Nova Scotia to South Dakota, Florida 

 and Texas. Spring to fall. 



7. Xanthoxalis Biishii Small. Stems solitary or rarely tufted on relatively 

 slender rootstocks, erect or nearly so, 1-3 dm. tall, loosely pubescent: leaves few: 

 leaflets bright green, the blades 7-8 mm. broad, or rarely smaller, more or less strigil- 

 lose and ciliate especially when young: cymes umbel-like, usually maturing one 

 flower at a time which is accompanied by several drooping buds: pedicels strigillose: 

 sepals oblong to linear-oblong, 3-4 mm. long, ciliate nearly all around: petals 9-12 

 mm. long, pale yellow: longer filaments glabrous: capsules rather stout, S'-IO mm. 

 long. [Oxalis Bushii Small.] 



In dry soil or thickets, Massachusetts, Missouri, Georgia and Arkansas. Spring and 

 summer. 



8. Xanthoxalis rufa Small. Stems usually solitary, sometimes on elongated 

 rootstocks, 1.5-4 dm. tall, loosely pubescent: leaves usually numerous: leaflets reddish 

 or purplish, the blades 8-20 mm. wide, sparingly strigillose or glabrous, at least at 

 maturity, except the ciliate margins: cymes dichotomous but the primary branches 

 manifestly shortened, maturing several flowers at a time: pedicels strigillose, con- 

 spicuously short: sepals oblong, linear-oblong or oblong-lanceolate, 3-4 mm. long, 

 ciliate at the tip, otherwise nearly glabrous: petals 7-10 mm. long, rather bright 



