Genus 3. 



WOOD-SORREL FAMILY. 



3. Xanthoxalis Bushii Small. Bush's Yellow 

 Wood-sorrel. Fig. 2667. 



Oxalis Bushii Small, Bull. Torr. Club 25: 611. 1898. 

 X. Bushii Small, Fl. SE. U. S. 667. 1903- 



Plants bright green. Stems erect, 2'-8' tall, often 

 simple ; leaves few ; petioles pubescent especiall)' 

 near the base ; leaflets with rounded lobes, strigil- 

 lose ; peduncles slender, nearly erect, usually soli- 

 tary, conspicuously overtopping the leaves, glabrous 

 or nearly so except near the base; cymes umbel-like; 

 sepals oblong, i}"-2" long, obtuse; corolla light yel- 

 low, 4^"-6" broad; filaments much dilated at the 

 base; styles slightly pubescent; capsules long-col- 

 umnar, 6"-7i" long. 



In dry soil. Nova Scotia to South Dakota, Colorado 

 and Georgia. May-June. 



4. Xanthoxalis rufa Small. Red-leaved 

 Wood-sorrel. Fig. 2668. 



O.ralis rufa Small, in Britton, Man. 577. 1901. 

 X. nifa Small, Fl. SE. U. S. 668. 1903. 



Plants reddish-purple. Stems early branched 

 at the base and decumbent, 4'-i2' long, some- 

 times glaucescent; leaves numerous, commonly 

 clustered; leaflets sometimes pale along the 

 midrib ; peduncles glabrous or villous, usually 

 surpassing the leaves; cymes dichotomous or the 

 primary branches suppressed, thus umbel-like 

 or clustered; sepals oblong or oblong-lanceolate. 

 i"-iA" long; corolla light yellow, 3"-S" broad; 

 petals glabrous, sometimes erose at the apex; 

 capsules short-columnar, abruptly pointed, 4"-6" 

 long. 



In woods and moist soil. Massachusetts to Minne- 

 sota and Georgia. April-Sept. 



5. Xanthoxalis filipes Small. Slender 

 Yellow Wood-sorrel. Fig. 2669. 



O.ralis filipes Small, in Britt. & Brown, III Fl. Ed. i. 



2: 349. 1897. 

 Xanthoxalis filipes Small, Fl. SE. U. S. 667. 1903- 



Plants bright green, very slender, sparsely pu- 

 bescent with appressed hairs. Stem erect or 

 decumbent, nearly simple, usually very leafy, 

 wiry, io'-2 high ; leaves i'- wide, long- 

 petioled, not stipulate, or the stipules repre- 

 sented by a narrow dilation of the base of the 

 petiole; leaflets obcordate, with unequal sides, 

 peduncles slender, equalling or exceeding the 

 leaves, mostly i-flowered; flowers yellow: pedi- 

 cels very slender, strigillose or glabrate, re- 

 curved in mature fruit ; sepals oblong-lanceolate, 

 2" long, obtuse, with a tuft of hairs at the apex; 

 petals 4" long, emarginate; capsule 4"-6" long, 

 gradually narrowed to the apex, often curved. 



In woods. Virginia to Tennessee, south to Georgia. 

 -May-Aug. 



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