HORTUS GRAMINEUS WOBURNENSIS. 325 



plant occupied would be naked the second year ; and these spots 

 afford every encouragement to the growth of weeds, as well as the 

 decaying roots afford nourishment to the life of grubs. 



HEDYSARUM 07iobrychis. Sainfoin, or Cock's-head. 



Generic character: Keel transversely obtuse:, legume jointed, 

 with one seed in each joint. 



Specific character : Legumes one-seeded, prickly; wings of the 

 corolla equal in length to the calyx ; stem elongated. 



Obs. — Stems round, striated, at first procumbent, in flower 

 ascending; stipules in pairs, oval-lanceolate, terminated by a 

 long point with membranaceous edges, sometimes fringed with 

 a few hairs. Leaflets eight or ten pairs, rather distant, and an 

 odd one ; lower elliptical, upper lanceolate or linear-lanceolate, 

 all with projecting points at the end ; young ones with the 

 mid-rib beneath, and the margins fringed with hairs. Le- 

 gume hemispherical, compressed with wrinkled prominences. 

 Wood. MSS.; E. Bot t. 96; F. Rust. t. 47; Huds. 322; 

 Jacquin. t. 352 ; Park. Theat. 1082, 1, Caput gallinaceum. 



Native of Britain. Root perennial. 



Experiments. — At the time of flowering, the produce from a 

 poor siliceous sandy soil is — 



dr. qr. 



Grass, 10 oz. The produce per acre 

 83 dr. of grass weigh, when dry - 25 ^ 

 The produce of the space, ditto - 50 3 



The weight lost by the produce of one acre in drying 

 G4 dr. of grass afford of nutritive matter 3 ^ 

 The produce of the space, ditto - 7 2 5 



At the time the seed is ripe, the produce from 

 a rich clayey loam is — 

 Grass, 13 oz. The produce per acre 

 80 dr. of grass weigh, when dry - 32 } 



The produce of the space, ditto - 83 O^i 



The weight lost by the produce of one acre in drying 

 64 dr. of grass afford of nutritive matter 2 2 ^ 

 The produce of the space, ditto - 8 0| 5 



The produce of sainfoin on a clayey loam with a saiidy subsoil, 

 is greater than on a siliceous sandy soil incumbent on clay ; but 



