OXALdDACEAE (WOOD SOKKEL VAM.ILY) 



583 



Stmlss ; petals white or purple. 



Rootstock creeping ; scapes 1 -flowered 



Bulbose ; scapes umbellately several-flowered 



Caulescent ; petals yellow. 

 Flowers large ; petals 1.4-2 cm. long ; Pa. and southward. 



Petals hairy on the margin ; leaflets S-15 mm. broad 



Petals essentially glabrous ; leaflets 2-4 cm. broad 



Flowers smaller ; petals 8-12 mm. long. 

 Stems erect or decumbent but not extensively creeping. 

 Peduncles mostly 2-flowered ; pedicels appressed-pubescent or strigillose, 

 deflexed in fruit. 



Stem covered with closely appressed short hairs 



Stem covered with loose spreading woolly pubescence .... 

 Peduncles mostly several-flowered ; pedicels ascending or widely diver- 



Stems prost 



gent, their pubescence sparse, spreading 

 strute, elongated, rooting at the node 



O. Acetosella. 

 O. violacea. 



0. Prieeae. 

 0. gran din. 



0. atricta. 

 O. filipes. 



0. cornieulata. 

 O. repens. 



1. 0. Acetosella L. (COMMON W.) 





Creeping ; leaves radical ; scapes 



l-flowered, 5-15 cm. high ;" petals white, with rose-colored or purple veins. 

 Deep woods, N. S. and e. Que. to Sask., s. to N. E., N. Y., and in the mts. to 

 N. C. (Eu.) Var. SUBPURPURASCENS DC., with petals rose-colored or purple, A 

 has been found at Chesterville, Me. (Miss Eaton}, and at Manchester, Vt. 

 (Grout}. (Eu.) 



2. 0. violacea L. (VIOLET W.) Nearly glabrous; base bulbous, scaly; 

 leaves radical; scapes umbellately several-flowered, 1.2-2.5 dm. high, exceeding 

 the leaves; petals violet. Rocky places and open woods, e. Mass to Minn, 

 and southw. 



3. 0. Prieeae Small. Caulescent ; stems erect, soft-villous, from a long 

 slender dark-colored rootstock ; leaflets 8-12 mm. broad ; pedicels in 2's or 3's 

 at the ends of long slender peduncles, deflexed in fruit ; petals yellow, ciliate. 

 Bowling Green, Ky. (Miss Price') ; and Ala. 



4. 0. grandis Small. Tall 

 (3-4.6 dm. high), smoothish or 

 covered with soft spreading pu- 

 bescence ; leaflets large (often 

 3.5-4.1 cm. broad), frequently 

 brownish-purple at the margin ; 

 long-peduncled inflorescences 3- 

 several-flowered ; petals yelloiv, 

 1.4-1.8 cm. long, not ciliate. 

 Sandy woods and alluvial soil, Pa. 

 to 111. and southw. May-Aug. 



5. 0. stricta L. Pale green, 

 appressed-pubescent or strigose ; 

 stems usually several, decumbent, 

 stoutish ; stipules evident ; pedi- 

 cels 1-4 (mostly 2), subumbellate 



at the end of the peduncle, at length deflexed ; the fruit large, columnar, 

 short-pointed, 15-23 mm. 

 long. Dry or sandy soil, 

 s. Me. to Dak. and southw. , 

 common. The petals pale 

 yellow, often with a reddish 

 spot near the base. FIG. 800. 

 6. 0. filipes Small. Very 

 slender, pubescence of the 

 stem loose and spreading; 

 petioles and peduncles fili- 

 form, elongated ; umbels 

 chiefly 2-flowered ; petals 

 yellow. ( 0. Brittonae Small.) 

 Sandy soil, s. Me. (Cham- 

 berlain & Collins) to n. N. Y., 

 Ct., Fla., and Tex. FIG. 801. 801. O. filipes. 



. O. stricta. 



