OX A LID A CEAE. 577 



3-15 cm. long; sepals linear or lanceolate, about 5 mm. leng, ciliolate, erect or 

 ascending; petals 8-io mm. long, commonly reddish at the base; capsule colum- 

 nar, 16-30 mm. long; seeds fully I mm. long, with interrupted transverse ridges. 

 In woods and fields, N. S. to N. Dak. and Colo., south to Fla. and Tex. Intro- 

 duced into Europe as a weed. April-Oct. 



5. Oxalis filipes Small. SLENDER YELLOW WOOD-SORREL. (LF. f. 2253.) 

 Foliage deep green. Stem wiry, usually very leafy, 0.5-2 dm. high; leaves 6-12 

 mm. wide, not stipulate, or the stipules very narrow; leaflets with unequal sides; ped- 

 uncles filiform, 2-3-flowered; pedicels very slender, recurved when mature; sepals 

 oblong- lanceolate, 3-4 mm. long, obtuse, with a tuft of hairs at the apex; petals 4-8 

 mm. long, emarginate; capsule 8-12 mm. long, gradually narrowed, often curved; 

 seeds I mm. long, with continuous ridges. In woods, Va. and \V. Va. to Tenn., 

 south to Ga. Plant smaller than the next preceding species. May- Aug. 



6. Oxalis Brittoniae Small, n. sp. Foliage bright green. Stem slender, 

 sparingly leafy, 1-4 dm. tall, often branched; leaves mostly 1-2 cm. broad; pet- 

 ioles filiform, sparingly villous; leaflets broader than long, nearly glabrous; ped- 

 uncles about twice as long as their subtending petioles; cymes dichotomous or the 

 primary branches suppressed, thus more umbel-like; sepals elliptic to narrowly 

 oblong, about 3 mm. long; corolla light yellow, 1-1.5 cm - wide; filaments glabrous; 

 styles glabrous; capsules columnar, acuminate, 1.5-2 cm. long; seeds I mm. long, 

 sharply ridged. In woods and fields, N. Y. to N. Car. and Tenn. Type from 

 Staten Island, N. Y. May -July. 



7. Oxalis Bushii Small. BUSH'S WOOD-SORREL. Foliage bright green. 

 Stems erect, 0.5-2 dm. tall, often simple; leaves few; petioles especially pubescent 

 near the base; leaflets with rounded lobes, strigillose; peduncles slender, nearly 

 erect, usually solitary, conspicuously overtopping the leaves, glabrous or nearly so 

 except near the base; cymes umbel-like; sepals oblong, 3.5-4 mm. long, obtuse; 

 corolla light yellow, 9-12 mm. broad ; filaments much dilated at the base; styles 

 slightly pubescent. In dry soil, Penn., Mo. and Ark. May-June. 



8. Oxalis recurva Ell. LARGE-FLOWERED WOOD-SORREL. (I. F. f. 2255.) 

 Foliage villous. Stems 1-3 dm. tall, often woody at the base; leaves 1-2 cm. 

 broad; leaflets often glaucescent; petioles filiform, slightly dilated at the base; 

 flowers bright yellow, I or 2 opening at a time; sepals oblong, about 4.5-6 mm. 

 long, obtuse, nearly erect; corolla 1.5-2 cm. broad; petals slightly notched; cap- 

 sule columnar, 10-15 mm - l n g> slender; seeds fully I mm. long, with broken 

 transverse ridges. In rocky or sandy places. Mo. to N. Car. and Ala. April-Aug. 



9. Oxalis Priceae Small. PRICE'S WOOD-SORREL. Foliage deep green. 

 Stems early decumbent, 1-3 dm. long; leaves often numerous; leaflets pale or 

 glaucescent beneath, ciliate; peduncles sometimes slightly longer than the petioles; 

 sepals linear or nearly so, 6-8 mm. long, pubescent at the base and tip; corolla 

 deep chrome-yellow, 1.4-2 cm. broad; petals pubescent without; styles copiously 

 villous; capsules stout, columnar, 10-15 mm - l n g- On rocky hillsides and in open 

 woods, Ky. Summer and fall. 



10. Oxalis rufa Small, n. sp. RED WOOD-SORREL. Foliage reddish-purple. 

 Stems early branched at the base and decumbent, 1-3 dm. long, sometimes glauces- 

 cent; leaves numerous, commonly clustered; leaflets sometimes pale along the 

 midrib; peduncles glabrous or villous, usually surpassing the leaves; cymes di- 

 chotomous or the primary branches suppressed, thus umbel-like; sepals oblong or 

 oblong-lanceolate, 2-2.5 mm< I n g5 corolla light yellow, 6-10 cm. broad; petals 

 glabrous, sometimes erose at the apex; capsules gradually narrowed, 8-12 mm. 

 long, usually pubescent with glandular hairs. In woods, Mass, to N. Y., Ga. and 

 Tenn. Type from New York Botanical Garden. April-Sept. 



11. Oxalis cymosa Small. TALL YELLOW WOOD-SORREL. (I. F. f. 2256.) 

 Foliage bright green. Stem 1.5-11 dm. high, branched above, often villous; 

 leaves 1.8-3 cm - broad; leaflets broader than long, sharply notched; petiole-bases 

 scarcely dilated; pedicels 6-8 mm. long, more or less villous; sepals lanceolate or 

 narrowly elliptic, 4-6 mm. long; corolla bright yellow, 8-10 mm. broad; petals ob- 

 tuse or emarginate; capsule columnar. 10 16 mm. long, gradually narrowed to the 

 summit; seeds almost 1.5 mm. long, with nearly continuous ridges. In woods and 

 fields, Ont. to Mich., Fla.. Neb. and Tex. May-Get. 



12. Oxalis grandis Small. GREAT YELLOW WOOD-SORREL. (I. F. f. 



