CL. XVII.] DIADELPHIA DECANDKIA. 295 



14. HIPPOCRE'PIS. HORSE-SHOE VETCH. 

 Calyx inferior, bell-shaped, divided half-way into five lance- 

 shaped, acute, permanent segments ; the two upper shorter. Co- 

 rolla of five petals, with claws longer than the calyx ; standard 

 heart-shaped, ascending ; wings inversely egg-shaped, obtuse ; 

 keel rounded, pointed, of two united petals, with separated claws. 

 Filaments ten, nine united into a tube, open along its upper 

 edge, the other separate, all curved upwards at the end ; anthers 

 roundish. Germen slender, compressed, tapering into an awl- 

 shaped, ascending style ; stigma linear, smooth. Legume com- 

 pressed, partly membranous, incurved, notched, with many 

 curved joints, finally separating at the joints, each of which con- 

 tains a single curved, oblong seed. Name, from hippos, a 

 horse, and crepis, a shoe. 359. 



1. H. comosa. Tufted Horse-shoe Vetch. Legumes in umbels, 

 curved downwards, not dilated at the margin. Boot woody, stems 

 from six inches to a foot long : leaflets from seven to eleven, in- 

 versely egg-shaped, hairy beneath : flowers about six together, on 

 long axillar or terminal stalks : flowers yellow, striated. Perennial : 

 flowers from May to September : grows in dry chalky pastures in 

 England: frequent. Eng. Bot. vol. i. pi. 31. Eng. Fl. vol.iii. p. 291. 



1061. 



15. HEDY'SAKUM. SAINT-FOIN. 



Calyx inferior, tubular, divided half-way into five awl-shaped, 

 straight segments. Corolla of five petals ; standard egg-shaped, 

 keeled at the back, slightly cleft, reflected at the sides ; wings 

 oblong, straight, narrower than the other petals ; keel of two 

 united petals, with separate claws, compressed, broader in front, 

 and very abrupt. Filaments ten, nine united into a flatfish tube, 

 open above, the other awl-shaped, separate, all bent upwards at 

 the extremity ; anthers roundish. Germen egg-shaped or ob- 

 long, compressed. Style awl -shaped, bent like the stamens ; 

 stigma acute. Legume compressed, with one or more roundish 

 joints, each joint two-valved and one-seeded. Seeds kidney- 

 shaped. Name, from hedus, sweet, and aroma, smell. 360. 



1. H. Onobrychis. Common Saint-foin. Cock' s-head. Leaves pin- 

 nate, nearly smooth ; legume one-seeded, toothed at the margin and 



ribs ; wings not longer than the calyx ; stem elongated. Stem 



two or three feet long : flowers crimson, in axillar clusters. Culti- 

 vated for feeding cattle. Perennial : flowers in June and July : 

 grows in dry hilly pastures in England : frequent. Eng. Bot. vol. ii. 

 pi. 96. Eng. FL vol. iii. p. 292. 1062. 



16. ASTRA'GALUS. MILK-VETCH. 



Calyx inferior, tubular, permanent, with five acute teeth, the 

 lower gradually longer. Corolla of five petals ; standard egg- 

 shaped, obtuse, erect, longer than the rest ; wings oblong, shorter ; 

 keel as long as the wings, rounded in front, of two united petals, 

 with separate claws. Filaments ten, nine united into a com- 

 pressed tube, open above, the other hair-like, separate ; anthers 



