OXALIDACEAE (WOOD SORREL FAMILY) 



LATHYRUS 



Closely resembling Vicia, but style dilated and flattish, hairy only 

 on the inner side. 



L. palustris, MARSH PEA. Slender and glabrous; stems usually 

 winged ; stipules lanceolate, ovate, sharp-pointed at both ends ; leaflets 

 3 or 4 pairs, lanceolate to elliptic ; pe- 

 duncles 3 to 5 flowered; flowers purple. 

 Banks of rivers and lakes. June to August. 



L. venosus, WILD PEA. Stout, climbing, 

 1 usually somewhat hairy ; stipules very 

 small and slender ; leaflets 4 to 6 pairs, 

 oblong, ovate; peduncles many-flowered; 

 flowers purple. Shaded banks. May to 

 July. 



L. ochroleucus, WILD PEA. Stems slen- 

 der, 3 to 9 dm. high; stipules semi-cordate, 

 half as large as the ovate leaflets ; pe- 

 duncles 7 to 10 flowered; flowers yellowish-white. Hillsides. May to 



July. 



Lathyrus venosus, 

 Wild pea. 



OXALIDACEAE (WOOD SORREL FAMILY) 



Low herbs with sour, watery juice. Leaves palmate, with 3 

 obcordate leaflets. Flowers with 10 to 15 stamens and a superior 

 ^-celled ovary. 



OXALIS 



Sepals 5, persistent; petals 5; stamens 10, usually united at base. 

 Styles 5 and distinct. Pod cylindric. 



O. violacea, VIOLET WOOD SORREL. Stemless, 

 nearly glabrous ; base bulbous and scaly ; leaves 

 radical ; stem naked, bearing an umbel of several 

 violet flowers. Rocky places and open woods. 



O. stricta, YELLOW WOOD SORREL. Pale green, 

 pubescent or strigose ; stems several, decumbent, 

 stoutish ; pedicels at length deflexed, mostly 2; 

 petals pale yellow, often with a reddish spot near 

 the base. Dry or sandy soil. 

 O. corniculata, YELLOW WOOD SORREL. Coalescent, regular or de- 



O.valis stricta, Yel- 

 low wood sorrel. 



