OXALIDACEAE. 197 



straight, in fleshy endosperm. About 15 genera and over 300 species, 

 chiefly of tropical distribution. 



Plants acaulescent, with coated bulbs ; flowers not yellow. 1. lonoxalis. 



Plants caulescent, with rootstocks ; flowers mostly yellow. 2. XanthoxaUs. 



1. IONOXALIS Small, Fl. SE. U. S. 665. 1903. 



Low, perennial acaulescent herbs the leaves and scapes arising from 

 coated scaly bulbs, the petioles long, the blades palmately 3-several-foliolate, 

 the violet, blue or white flowers in umbel-like cymes. Sepals 5, bearing apical 

 tubercles in pairs. Petals 5. Stamens 10, the filaments united at the base. 

 Ovary elongated; styles distinct. Capsules narrow, erect. [Greek, purple 

 Oxalis.] Over 100 species natives of America. Type species: Oxalis 

 violacca L. 



1. lonoxalis intermedia (A. Kich.) Small, N. A. Fl. 25: 43. 1907. 

 Oxalis intermedia A. Eich. Ess. Fl. Cub. 315. 1845. 



Scape 1-3 dm. high, sparingly pubescent, slender, as long as the leaves or 

 longer. Petioles sparingly pubescent; .leaflets 3, obdeltoid, 2-6 cm. wide, bright 

 green and glabrous above, paler and somewhat pubescent beneath, 2-lobed, the 

 lobes ovate; cymes 4-13-flowered ; pedicels glabrous, 1-2 cm. long; sepals 4-5 

 mm. long, bearing 1 pair of apical tubercles; petals violet, 11-14 mm. long; 

 shorter filaments slightly pubescent, the longer ones copiously pubescent. 



Waste and cultivated lands, New Providence, at Nassau : Cuba ; Virgin Islands ; 

 Guadaloupe ; Martinique. CUBAN PURPLE WOOD-SORREL. 



2. XANTHOXALIS Small, Fl. SE, U. S. 666. 1903. 



Caulescent, annual or perennial herbs, rarely shrubs, with alternate, long- 

 petioled, 3-foliolate leaves, the leaflets sessile, notched or obcordate, the yellow 

 flowers in peduncled cymes. Sepals 5. Petals 5. Stamens 10, the filaments 

 united into a tube at the base. Ovary oblong to linear; styles filiform or sub- 

 ulate. Capsule oblong or columnar, usually narrowed to the summit, erect. 

 Seeds transversely ridged or tubercled. [Greek, yellow Oxalis.] About 50 

 species, widely distributed. Type species: Oxalis corniculata L. 



1. Xanthoxalis corniculata (L.) Small, Fl. SE. U. S. 667. 1903. 

 Oxalis corniculata L. Sp. PI. ,435. 1753. 



Pubescent or nearly glabrous, annual or perennial, deep-green, freely 

 branching from the base; stem 2.5-15 cm. long, the branches diffuse, mainly 

 procumbent and often creeping. Leaflets 8-12 mm. wide; petioles dilated at 

 the base into oblong rounded or truncate stipules; peduncles 1-3-flowered; 

 flowers 5-10 mm. wide; pedicels strigillose, more or less reflexed; capsule 

 oblong, 1-1.8 cm. long, appressed-pubescent; seeds compressed, transversely 

 ridged. 



Waste and cultivated lands, New Providence at Nassau and Grant's Town : 

 widely distributed in temperate and tropical regions of both hemispheres. Re- 

 ferred by Mrs. Northrop to Oxalis corniculata repens Zucc. YELLOW PROCUMBENT 

 WOOD-SORREL. 



