264 DIADELPHIA DECANDRIA. [ TrifoUim. 



rived, according to Tlieis, from Gwig, Celtic; Wichcn in Ger- 

 man ; /3/x/ov in Greek ; Vesce in French ; in English, Vetch. 



12. EiivuM. Sligma capitate, downy all over — Name de- 

 rived, according to Theis, from the Celtic erw, 9. 2)loughed Jield, 

 of which it is the pest. 



ff Style glabrous. 

 4- Legume of 2, more or less comjilete, longitudhial cells. 



13. Astragalus, iiiee/ of the coro^/a obtuse. Legwne 2-ce\\ed 

 (more or less perfectly) ; cel/s formed by the iiiflexed margins 



of the lower suture Named from aariayu'/.o:, one of the bo/ies 



of the heel, in allusion to the knotted root of that individual 

 l)lant to which it was formerly applied. 



14. OxYTROPis. Keel of the cor. with a narrow point. Le- 



ffiune 2-celled (more or less perfectly) ; cells foimed by the in- 

 flexed margins of the upper suture. — Named from o^v;, sharp, 

 and r.o-i;, a heel, one of the essential characters of this Genus, 

 as distinguishing it from the preceding. 



-f--t- Leguma more or less jointed. 



15. Ornithopus. Legume compressed, curved, of many close, 

 single-seeded joints, whose sides are equal ; heel very small. 

 -—Name, osvi;, c^viiJo;, a bird, and -Trouc, a foot, from the simila- 

 rity of the seed-vessels to a bird's foot. 



16. ARTHROLoBiURr. Legume cylindrical, curved, of many, 

 close, single-seeded joints, whose sides are equal. Keel vei-y 

 small. — Name ; ao^Pov, a Joint, and 7.oto;, apod; from the jointed 

 character of the seed-vessel, 



17. HippocREPis. Legume compressed, submembranaceous, 

 of numerous joints, which are curved like a horse-shoe, so that 

 each legume has many deep notches on one side. — Name, /'--or, 

 a horse, and -/.^rf-rig, a shoe, from the form of the fruit. 



-5-H — t- Legume of one cell, one- or many-seeded, {iiot formed of 



many joints'). 



18. Onobrychis. Legume sessile, of one indehiscent joint, 

 compressed, coriaceous, prickly, crested, or winged. — Named 

 from OK)-, an ass, and /Sgyp^w, to eat ; the plant affording a valu- 

 able fodder. 



19. Memlotus. Legume 1- or few-seeded, indehiscent, longer 



tlian the cal. Petals distinct, deciduous Flowers racemose. 



Leaves ternate. — Name, — met, honey, and Lotus, the Genus so 

 called. 



20. Trifoltum. Legume 1- or more-seeded, indehiscent, 

 sliorter than the calyx by which it is enclosed, (except in T. 

 ornithopodiodes). Petals mostly combined by their claws and 



