- 63 - 



55a. Leaflets broadly ovate Tick Trefoil, Desmodium yiridiflorum. 

 55b. Leaflets oblong-ovate Tick Trefoil. Desmodium dillenii. 



56a. Leaflets 3 5 cm. long, oblong-ovate, scabrous above 



Tick Trefoil, Desmodium rigidum, 

 56b. Leaflets 1 2.5 cm. long, broadly ovate or oval, not scabrous 



above 57. 

 57a. Stem and leaves glabrous or very nearly so 



Tick Trefoil, Desmodium marilandicum. 

 57b. Stem and leaves conspicuously pubescent 



Tick Trefoil, Desmodium obtusum. 

 58a. Flower-clusters sessile, or on peduncles shorter than the 



subtending leaves 59. 

 58b. Flower-clusters, or many of them, on peduncles longer than 



the leaves 61. 



59a. Leaves linear-oblong Bush Clover, Lespedeza virginica. 



59b. Leaves ovate or oval 60. 



60a. Leaves and stem velvety or downy 



Bush Clover, Lespedeza stuvei. 



60b. Leaves and stem glabrous, or with close appressed 

 pubescence Bush Clover, Lespedeza frutescens. 



61a. Leaves ovate or broadly elliptical; corolla conspicuously ex- 

 ceeding the calyx 62. 

 Gib. Leaves linear-oblong; calyx about as long as the corolla 



Bush Cloyer, Lespedeza manniana. 

 62a. Stem erect or ascending 63. 

 62b. Stem trailing; peduncles much exceeding the leaves 



Bush Cloyer, Lespedeza procumbens. 



63a. Villous-pube'scent; inflorescence dense; some peduncles shorter 



than the leaves Bush Cloyer, Lespedeza nuttallii. 



63b. 'Slightly pubescent or glabrous; inflorescence loose, on peduncles 



much longer than the leaves Bush Cloyer, Lespedeza violacea. 



LINACEAE, the Flax Family 



Herbs with simple leaves, and regular flowers, having 5 sepals, 

 5 yellow or blue petals, 5 stamens, and 5 styles. 



la. Flowers blue (3 6 dm. high; summer) 



Flax, Linum usitatissimum. 



Ib. Flowers yellow (3 8 dm. high; summer) (Wild Flax) 2. 

 2a. Middle stem-leaves below the branches opposite 



Wild Flax, Linum striatum. 



2b. Middle stem-leaves below the branches alternate 3. 

 3a. Leaves narrowly lanceolate to linear, 14 mm. wide 4. 

 3b. Leaves oblanceolate to oblong, 4 6 mm. wide 



Wild Flax, Linum virginianum. 



4a. Leaves entire Wild Flax, Linum medium. 



4b. Upper leaves glandular-ciliate Wild Flax, Linum sulcatum. 



