THE PEA FAMIJCY. 175 



♦• Leaves without tendrils. 



t Leaves pinnate, 



1. Leaves of two or four leaflets, without an odd one. 16. Cbimson Heath-vetch. 



2. Leaves of five leaflets, the lowermost pair close 



upon the stem. 

 Stem soUd, nearly prostrate ; flowers in umbels 

 of three to five. 



Leaflets egg-shaped 17. Meadow Lotus. 



Leaflets linear-lanceolate 18. Slender Lotus. 



Stem hollow, erect ; flowers in umbels of six to 



twelve 19. Great Coronet Lotus. 



3. Leaves of numerous pairs of leaflets, an odd one 



at the end. 



Stems upright ; flowers large, crimson, in pyra- 

 midal heads 21. Saint-foin. 



Stems prostrate ; flowers minute, prettily varie- 

 gated, in little umbels 20. Bird's-foot. 



ff Leaves trifoliolate. 

 J Flowers a decided yellow. 

 Flowers in long, upright racemes, all pointing one way. 

 Pod irregularly net-veined and wrinkled; stem 



usually two or three feet high 22. Common Melilot. 



Pod transversely wrinkled ; stem usually under two 



feet high 23. Field Melilot. 



Flowers in round or oval heads, or little umbels. 

 Pod scarcely protruding beyond the calyx, and 

 straight, or at least neither prickly nor 

 twisted. 

 Head of flowers large, dense, and shewy ; upper 



petal furrowed 31. Yellow Hop Trefoil. 



Head of flowers scanty and small ; upper petal 

 not furrowed. 

 Middle leaflet stalked; heads many-flowered.. 32. LittleYellowTrefoil. 

 Middle leaflet sessile ; heads few-flowered .. 33. Least Yellow Trefoil. 

 Pod projecting beyond the calyx, usually edged 

 with prickles, and spirally tAvisted. 

 Pod spiral, prickly, and several-seeded. 



Spire of three to four convolutions, and fur- 

 rowed at the edge. 

 Plant glabrous ; leaves spotted with black.. 30. Spotted Medick. 



Plant downy ; leaves not spotted 38. Little Bur Medick. 



Spire of two to three convolutions, and not 



furrowed at the edge 37. Toothed Mediok. 



Pod not forming a complete spire, rugged, black, 



and one-seeded 35. Common Field Medick. 



