Part 1, 1907] OXALIDACEAE 55 



faces and ciliate ; peduncles longer than the petioles ; pedicels villous-hirsute, refracted in 

 fruit ; sepals 6-7 mm. long at maturity ; petals golden-yellow, 14-17 mm. long ; longer 

 filaments glabrous ; capsules columnar, stout, 10-12 mm. long, hirsute, abruptly narrowed 

 at the apex. 



Type locality : Nashville, Tennessee. 



Distribution : Tennessee to Georgia. 



19. Xanthoxalis cymosa Small, Fl. SE. U. S. 668. 1903. 



Oxalis cymosa Small, Bull. Torrev Club 23 : 267. 1896. 



Oxalis corniculata B. L. Robinson, Jour. Bot. 44: 390. 1906. Not O. corniculata L,. 1753. 



Stems erect, 2-11 dm. tall, loosely pubescent or nearly glabrous, arising from slender 

 rootstocks ; leaflets bright-green or deep-green, the blades 10-27 mm. broad, glabrous or 

 with scattered hairs on both surfaces and ciliate ; peduncles much longer than the petioles ; 

 pedicels villous, not refracted in fruit ; sepals 3-1 mm. long at maturity ; petals deep- 

 yellow, 7-10 mm. long ; longer filaments glabrous ; capsules columnar, slender, 10-16 

 mm. long, very sparingly pubescent, gradually narrowed at the apex. 



Type locality' : Riverdale, New York. 



Distribution : Ontario to Michigan, Florida. Nebraska, and Texas. 



Illustration : Britt. & Brown, 111. Fl./. 2256. 



20. Xanthoxalis grandis Small, Fl. SE. U. S. 668. 1903. 



i alts grandis Small, Bull. Torrey Club 21 : 475. 1894. 



Stems erect, 3-12 dm. tall, sparingly pubescent with scattered spreading hairs, arising 

 from stout horizontal rootstocks ; leaflets bright-green except the brown margin, the blades 

 25-40 mm. broad, usually glabrous except for the ciliate margins and for some scattered 

 hairs about the veins beneath ; peduncles longer than the petioles ; pedicels slightly villous 

 and sometimes partially strigillose, not refracted in fruit; sepals herbaceous, 4.5-6 mm. 

 long at maturity ; petals deep-3'ellow, 13-18 mm long ; longer filaments pubescent ; capsules 

 columnar, stout, 7-10 mm. long, sparingly pubescent, rather abruptly narrowed at the apex. 



Type locality': Wysox, Pennsylvania. 



Distribution : Pennsylvania to Indiana, Georgia, and Alabama. 



Illustrations: Bull.'Torrey Club 21 : pi. 223 ; Britt. & Brown, 111. Fl./ 2257. 



21. Xanthoxalis pygmaea Small, sp. now 

 Stems spreading and creeping, filiform, several cm. long, glabrous, arising from very 

 slender rootstocks ; leaflets bright-green, the blades 3-6 mm. wide, parted to near the base 

 or to below the middle, with few hairs scattered along the margins ; peduncles much longer 

 than the petioles; cymes 1-flowered ; pedicels glabrous; sepals about 3 mm. long at ma- 

 turity, linear-oblong to linear-lanceolate, ciliate near the tip ; petals yellow, 9-12 mm. 

 long ; filaments capillar.v, glabrous and unappendaged ; styles about as slender as the fila- 

 ments ; capsules not seen. 



Type collected in Cuba, C. Wright 2178. 

 Distribution : Known only from the type locality. 



22. Xanthoxalis vulcanicola (Dorm. Smith) Small. 



Oxalis vulcanicola Donn. Smith, Bot. Gaz. 23 : 241. 1897. 



Stems herbaceous, 2-7 dm. long, spreading or creeping, pubescent, densely so and 

 more or less shaggy near the ends ; leaflets bright-green, the blades cuneate to obovate, 

 8-35 mm. long, notched at the apex anil with the lobes directed forward, more or less 

 pubescent, especially beneath ; peduncles longer than the leaves ; pedicels copiously 

 pubescent; sepals 4.5-6 mm, long, linear-lanceolate; petals yellow and streaked with 

 violet, about twice as long as the sepals ; filaments glabrous ; capsules oblong, about as 

 long as the sepals. 



Ty'PE locality' : Sitio Birris, Volcan Irazii, Costa Rica. 



Distribution : Costa Rica. 



23. Xanthoxalis madrensis (S. Wats.) Small. 



OxaKs madrensis S. Wats. Proc. Am. Acad. 25 : 144. 1890. 

 Pseudoxalis madrensis Rose, Contr. U. S. Nat. Herb. 10 : 117. 1906. 



Stem branched at the base, the branches diffuse or spreading, 2-4 dm. long, pubescent 

 with fine lax hairs ; leaflets bright-green, the blades obovate, 10-15 mm. long, notched at 



