SUMMARY. xiii 



Capsule two-celled, two-valved. Leaves glabrous, opposite, corda,te- 

 oblong, obtuse, crenate ; bracts small and linear. Stem erect, winged 

 By the sides of watercourses. June, July, August, September. 

 Perennial. 



SAINFOIN, ONOBRYCHIS SATIVA. Nat. Ord., Leguminosce. 

 Calyx five-toothed, the teeth long and slender. Corolla of five petals, 

 papilionaceous, wings short. Stamens ten, diadelphous. Inflorescence 

 racemose, on long axillary peduncles. Ovary one-celled. Style and 

 stigma one. Legume two-valved, indehiscent, sessile, toothed on 

 inner margin, coriaceous, flattened, one-seeded. Leaves stipulate, 

 alternate, pinnate, without tendrils, glabrous; numerous leaflets, 

 stipules small, finely -pointed. Open down-land and chalk slopes. 

 June, July. Perennial. 



BAG-WORT, NECIO JACOBCEA. Nat. Ord., Composite.- Calyx 

 adherent with ovary. Florets all perfect. Involucre having one row 

 of equal scales, and a few smaller ones at base. Stamens five. Anthers 

 syngenesious, ecaudate. Ovary one. Style one, sheathed by anther- 

 tube, bifid at apex. Stigmas on inner surface of the two branches of 

 style. Receptacle naked. Heads of flowers in corymbs. Fruit an 

 achene, terete, pappus, pilose. Leaves pinnate or pinnatifid, lyrate, 

 very variable in form and size, segments toothed, glabrous. Stems 

 erect, striate, branched near the summit. Eoadsides, waste ground, 

 neglected meadows. July, August, September. Perennial. 



CENTAURY, ERYTHEMA CENTAURIUM. Nat. Ord., Gentia- 

 nace. Calyx five-cleft, half as long as tube of corolla, persistent, 

 segments linear. Corolla regular, infundibuliform, pink, limb five- 

 cleft, spreading, stellate. Stamens five. Anthers twisted. Stigmas 

 two. Inflorescence paniculate. Capsule linear, two-celled. Stem- 

 leaves opposite, exstipulate, ovate, oblong. Eoot-leaves spreading, 

 broader than those of the stem. Stem erect, nearly simple, glabrous- 

 Whole plant bitter to taste. Dry pastures. June, July, August, Sep- 

 tember. Annual. 



CROSS-WORT, GALIUM CRUCIATUM. Nat. Ord., RuUacece. 

 Calyx adherent with ovary. Corolla regular, yellow, small, rotate, 



