PAPILIONACEAE (PEA FAMILY) 



23 MELIL6TUS. 



i a Flowers white WHITE SWEET CLOVER. (M. alba.) 



b Flowers yellow. .YELLOW SWEET CLOVER. (M. officinalis.) 



24 STROPHOSTYLES TRAILING WILD BEAN. (S. helvola.) 



25 MEDICAGO. 



i a Flowers bluish-purple or violet, in racemes 



ALFALFA. (M. satlva*) 

 b Flowers yellow, in heads 



BLACKSEED HOP-CLOVER. (M. lupullna.) 



26 TRIF6LIUM. 



1 a Flowers yellow 2 



b Flowers not yellow 4 



2 a Terminal leaflet distinctly stalked 



Low HOP-CLOVER. (T. procumbens.) 



b Terminal leaflet not distinctly stalked, or very short- 

 stalked 3 



3 a Leaflets 1 /4- 1 /2 in. long; heads loosely-flowered 



LOOSELY-FLOWERED HOP-CLOVER. (T. dubium.) 

 b Leaflets %-i in. long; heads densely-flowered 



HOP-CLOVER. (T. aureum.) 



4 a Flowers crimson; heads 1-3 in. long, oblong 



CRIMSON CLOVER. (T. incarnatum*) 

 b Flowers red, pink, or white 5 



5 a Heads oblong, with numerous gray, silky hairs; plant 



grayish ; flowers whitish 



RABBIT-FOOT. (T. arvense.) 

 b Heads ovoid to globose, not grayish 6 



6 a Heads ovoid; flowers red to purple; plants somewhat 



hairy 7 



b Heads globose ; flowers pink to white ; plants not hairy 8 



7 a Leaflets usually blotched or spotted near the middle; 



leaflets finely toothed RED CLOVER. (T. pratense.*) 



b Leaflets not spotted near the middle; leaflets entire 



MAMMOTH CLOVER. (T. medium*) 



8 a Flowers pink to white ; plant erect or ascending, not 



rooting at the nodes. .ALSIKE CLOVER. (T. hybridum.) 

 b Flowers white; plant prostrate, rooting at the nodes 



WHITE CLOVER. (T. re pens.) 



27 STYLOS ANTHES PENCIL-FLOWER. (S. biftbra.) 



28 LESPEDfcZA. 



1 a Plant cultivated in gardens for the flowers 



GARDEN BUSH-CLOVER. (L. sieboldi.*) 

 b Plants not cultivated 2 



2 a Flowers in dense oblong or globose heads Vz-2, in, long; 



corolla yellowish-white 3 



b Flowers scattered or arranged in axillary clusters; cor- 

 olla purplish 4 



