OXALIDACEAE (WOOD-SORREL FAMILY) 



2 a Leaves deeply lobed or pinnatifid 



ROSE GERANIUM. (P. quercifblium.*) 



b Leaves more or less rounded, not deeply lobed or pin- 

 natifid 3 



3 a 2 upper petals more or less erect, striped, the 3 lower 



spreading; stalk of each flower jointed 



NUTMEG GERANIUM. (P. odoratissimum.*) 

 b Flowers not completely as in a 4 



4 a Leaves rounded, often variegated or marked with darker 



colored zone; plant somewhat strong-scented 



COMMON GERANIUM. (P. hortbrum*) 

 b Leaves oval to ovate, sometimes rounded; plant not 



strong-scented PELARGONIUM. (P. domesticum.* ) 



2 OXALIDACEAE. Wood-sorrel Family. 

 i OXALIS. 



1 a Plant cultivated in pots or in gardens 



GARDEN OXALIS. (O. rubra.*) 

 b Plants not cultivated 2 



2 a Flowers pink or white with pink veins 



WOOD-SORREL. (O. acetosella.) 

 b Flowers yellow 3 



3 a Plant more or less erect, branched above; flower stalks 



erect or spreading TALL SHEEP-SORREL. (O. cymbsa.) 



b Plants more or less prostrate, branched at base; flower 



stalks usually reflexed at maturity 4 



4 a Flowers %-% in. broad; capsules %-% in. long, taper- 



ing to apex. .PROCUMBENT SHEEP-SORREL. (O. corniculata.) 

 b Flowers Vz-% in. broad; capsules %-i in. long, short- 

 pointed 5 



5 a Plant with appressed hairs 



UPRIGHT SHEEP-SORREL. (O. slricta.) 

 b Plant with loose, spreading hairs 



SLENDER SHEEP-SORREL. (O. filipes.) 



3 TROPAEOLACEAE. Nasturtium Family. 

 i TROPAfcOLUM NASTURTIUM. (T. majus.*) 



4 L1NACEAE. Flax Family. 

 i LlNUM. 



1 a Flowers yellow 2 



b Flowers not yellow 4 



2 a Stem and branches angled, sticky 



RIDGED YELLOW FLAX. (L. striatum.) 

 b Stem and branches circular, not sticky 3 



3 a Leaves more or less appressed to the stem 



STIFF YELLOW FLAX. (L. medium.) 

 b Leaves spreading from the stem 



WILD YELLOW FLAX. (L. virginianum.) 



178 



