OXALIDACEAE 667 



Short styles with recurved tips during anthesis : corolla golden yellow. 



10. X. recurva. 



Short styles with erect tips during anthesis : corolla light yellow. 11. X. Srittoniae. 

 b. Sepals ciliate only at the apex or near it : leaflets mainly over 20 



mm. broad. 



Leaflets strigillose, the margins green : capsules 10-12 mm. long. 12. X. interior. 

 Leaflets essentially glabrous except the brown ciliate margins : 



capsules 8-10 mm. long. 13. X. grandis. 



B. Pedicels yillous or loosely pubescent. 



Sepals ciliate only at the tip, 3.5-5 mm. long : cymes dichotomous : petals 



7-10 mm. long. 14. X. cymosa. 



Sepals ciliate all around, about 7 mm. long : cymes umbel-like : petals 



about 15 mm. long. 



Petals glabrous : longer filaments glabrous : copiously pubescent. 15. X. hirsuticaulis. 



Petals pubescent without : longer filaments ciliate above : stem with 



few scattered hairs. 16. X. Priceac. 



1. Xanthoxalis corniculata (L.) Small. Stem branched at the base, the branches 

 0.5-4 dm. long, creeping, somewhat pubescent with more or less appressed hairs : leaflets 

 deep green, the blades 5-12 mm. broad or sometimes larger, ciliate and commonly with 

 scattered hairs on the surface : pedicels minutely strigillose : sepals oblong to oblong-lan- 

 ceolate, 3-4 mm. long, ciliate at the apex or only near it : petals 7-10 mm. long : filaments 

 glabrous : capsule 8-13 mm. long. [Oxalis corniculata L.] 



In waste places and in fields and on iroadsides, New Jersey to the Indian Territory and the Gulf 

 States. Adventive as far north as Ontario. Also in the tropics. Throughout the year. 



2. Xanthoxalis Langloisii Small. Similar to O. corniculata in habit, but relatively 

 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 rootstocks, 

 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 cilate : 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 Texan a 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 : pedi- 

 cels 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 some- 

 times from mere annual roots, strigillose, often decumbent : leaves usually numerous : leaf- 

 lets bright green, 8-16 mm. broad, glabrous or with a few scattered hairs : pedicels strigil- 

 lose : sepals oblong or linear-lanceolate, 4-6 mm. long, sparingly ciliate, more or less pu- 

 bescent 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 Bushii 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 strigillose and ciliate 

 especially when young : cymes umbel-like, usually maturing one flower at a time which is 



