668 OXALIDACEAE 



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 fila- 

 ments glabrous : capsules rather stout, 8-10 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 root- 

 stocks, 1.5-4 dm. tall, loosely pubescent : leaves usually numerous : leaflets reddish or pur- 

 plish, 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 short- 

 ened, maturing several flowers at a time : pedicels strigillose, conspicuously 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 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 rootstocks, 

 erect or nearly so, villous : leaflets purple or purple on both sides of the green midrib, 4-1 1 

 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 overtopping 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 recur va Ell. ] 



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



11. Xanthoxalis Brittoniae Small. Stems solitary or tufted on slender woody root- 

 stocks, 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 of them 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. 

 I?""* 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 : leaf- 

 lets 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. 



