668 OXALIDACEAE 



yellow: longer filaments glabrous: capsules stout, 7-9 mm. long, on erect or spreading 

 pedicels. [Oxalis rufa Small.] 



In damp soil or woods, Massachusetts to Minnesota and Georgia. Spring to fall. 



9. Xanthoxalis colorea Small. Stems coumionly tufted on slender woody root- 

 stocks, erect or nearly so, villous: leaflets purple or purple on both sides of the green 

 midrib, 4—11 mm. broad, usually with a few scattered hairs on the surfaces, and more 

 or less ciliate: cymes umbel-like, the peduncles scarcely overtopping the leaves: 

 pedicels strigillose: sepals oblong to lanceolate or linear-lanceolate, 3-4 mm. long, 

 ciliate mainly at the apex and sparingly so along the margins: petals 8-11 mm. 

 long, light yellow: longer filaments ciliate above: capsules relatively slender, 9-12 

 mm. long, on more or less reflexed pedicels. 



In woods, North Carolina to Georgia and Mississippi. Spring and summer. 



10. Xanthoxalls reciirva (Ell.) Small. Stems mostly tufted on the rootstocks, 

 1-3.5 dm. tall, villous: leaflets bright green, the blades 6-11 mm. wide, glabrous 

 or nearly so, except the margins: cymes umbel-like, the peduncles usually much over- 

 topping the leaves: pedicels strigillose: sepals oblong to linear-lanceolate, 4^-5.5 mm. 

 long, ciliate nearly all around: petals 11-15 mm. long, golden yellow: longer filaments 

 ciliate at least above: short styles recurved during authesis: capsules rather slender, 

 11-13 mm. long, on reflexed pedicels. [Oxalis recurva Ell.] 



In dry or rocky soil. North Carolina, Florida and Mississippi. Spring and summer. 



11. Xanthoxalls Brittoniae Small. Stems solitary or tufted on slender woody 

 rootstocks, 1-4 dm. long, erect or spreading, loosely hairy: leaflets bright green, 6-14 

 mm. wide, commonly a little strigillose and ciliate: cymes dichotomous when well 

 developed, often slightly raised above the leaves on the elongating peduncles: pedicels 

 strigillose: sepals oblong to lanceolate, 3.5-5.5 mm. long, sparingly ciliate all around: 

 petals 5-10 mm. long, light yellow: longer filaments pubescent above: short styles 

 not recurved during anthesis: capsules slender, 7-12 mm. long, on reflexed pedicels. 

 [Oxalis Brittoniae Small.] 



In woods and fields or on hillsides, New York to Missouri and Florida. Spring and 

 summer. 



12. Xanthoxalls interior Small. Stems usually solitary, 3-6 dm. tall, villous: 

 leaflets bright green throughout, the blades 20-30 mm. wide or some smaller, 

 strigillose, somewhat ciliate: cymes normally dichotomous, with some of the branches 

 more or less suppressed, commonly raised above the leaves by the elongating 

 peduncles: pedicels strigillose: sepals oblong to oblong-lanceolate, about 4 mm. long, 

 ciliate at the tip: petals 6^9 mm. long, light yellow: longer filaments sparingly 

 ciliate above: capsules rather slender, 8—10 mm. long, on erect or ascending pedicels. 



In woods or on partly shaded hillsides, Missouri and Arkansas. Summer and fall. 



13. Xanthoxalls grdndis Small. Stems commonly solitary on more or less elon- 

 gated rootstocks, 3-12 dm. tall, sparingly or loosely pubescent with spreading hairs: 

 leaflets bright green, and brown around the margins, the blades 25-40 mm. wide, 

 ciliate, and often strigillose along the nerves beneath: cymes dichotomous, with some 

 of the branches suppressed, usually not projecting much beyond the leaves: pedicels 

 strigillose: sepals oblong, narrowly oblong or ovate-oblong, 4.5-6 mm. long, ciliate at 

 the tip and for some distance below it : petals deep yellow, 13-18 mm. long : longer 

 filaments ciliate: capsules stout, 7-10 mm. long on erect or spreading pedicels. 

 [Oxalis grandis Small.] 



On shaded banks, Pennsylvania to Indiana, Georgia and Alabama. Summer and fall. 



14. Xanthoxalls cymosa Small. Stems solitary or few together, 2-11 dm. tall, 



loosely pubescent: leaflets bright or deep green, the blades 10-27 mm. wide, nearly 



glabrous or sparingly strigillose about the nerves, especially beneath and ciliate: 



cymes dichotomous, commonly raised above the leaves by the elongating peduncles: 



pedicels villous: sepals oblong to oblong-lanceolate, 3-4 mm. long, ciliate at the apes: 



petals deep yellow 7-10 mm. long: longer filaments glabrous: capsules slender, 10-16 



mm. long, on erect or spreading pedicels. [Oxalis cymosa Small.] 



In moist or shaded soil, Ontario to Michigan, Florida, Nebraska and Texas. Spring 

 to fall. 



