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 commonly 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. Xanthoxalis 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 anthesis: 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. Xanthoxalis 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. Xanthoxalis 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. Xanthoxalis grandis 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. Xanthoxalis 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 apex: 

 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. 



