CL. XVII.] DIADELPHIA DECANDRIA. 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 contains a 

 single curved, oblong seed. Name, from hippos, a horse, and 

 crepis, a shoe. 359. 



1. H. coiiu'isa. Tufted Horse-shoe Vetch. Legumes in umbels, curved 



downwards, not dilated at the margin. Root woody : stems from six 



inches to a foot long : leaflets from seven to eleven, inversely 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'SARUM. SAIST-FOIN. 



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

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

 keeled at thd 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 flattish 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. Oniibrychis. Common Saint-fain, Cock's-head. Leaves pinnate, 

 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. Cultivated 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 

 compressed tube, open above, the other hair-like, separate ; an- 



