LEGUMINIFER.E. 155 



bulate^ setaceous, almost equal, longer than the coi'olla, more or 

 less spreading wheu iu fruit; the teeth are beautifully fringed 

 with long, whitish hairs. 



Sandy fields. Annual ; July- September. 



T. striatum. Soft Knotted Trefoil. — e.b. 1843. l.b.s, 277. 

 A.M. C. 50. Lat. 50-57°. Alt. 0-200 yds. Tern. 52-47°. 



Stems spreading or erect or ascending, very downy, 4-6 inches 

 high. Leaflets obovate or oblong, toothed at the apex ; stipules 

 ovate, acute, awned, almost membranous. Flowers in ovate, 

 sessile or shortly pedunculate heads, elongated after flowering, 

 pale-white or roseate, with bracts at their base. Divisions of the 

 calyx linear-subulate, very hairy, spreading or erect wheu in 

 fruit. Tube urceolate or somewhat globular when in fruit. 



Dry, sandy places. Annual ; June, July. 



This species is distinguished from the following principally by 

 its less rigid calyx-teeth. 



T. scabrum, L. Rough Trefoil. — e.b. 903. l.b.s. 276. 

 A. 13. 0. 40. Lat. 50-57°. Alt. 0-100 yds. Tern. 52-48°. 



Stems slender, rigid, prostrate or ascending, flexuous, branch- 

 ing, downy, a few inches high, about the same height as the 

 stem of T. striatum. Heads ovate, ohlong after flowering, soli- 

 tary, axillary, and terminal. Flowers pale-white or pink. Calyx- 

 tube oblong, slightly enlarged under the limb, coriaceous, hairy, 

 the throat is shut by two callous processes. Divisions of the 

 calyx rigid, somewhat spinous, divergent. 



Dry, sandy places. Aim.ual ; June, July. 



T. Bocconi, Savi. Boccone's Trefoil. — e.b.s. 2868. l.b.s. 

 277^. 



A. 2. C. 1. Lat. 50°. Alt.? Tern. 52°. 



Stems erect or ascending or prostrate. Leaflets obovate or 

 oblong, cuneate at the base, toothed at the summit; stipules 

 veined, with subulate, setaceous points. Heads solitary or in 

 pairs, dense, becoming oblong-cylindrical (somewhat conical). 

 Calyx-tube membranous, hairy on the outside and in the throat, 

 which is not callous as it is in T. scahrum. Divisions of the 

 calyx lanceolate, spinous at their tips, connivent, slightly unequal, 

 the lower one as long as the tube. 



Dry places, rare. Cadgewith, Cornwall. Annual ; July. 



T. maritimum, Huds. Teasel-headed Trefoil. — e.b. 220. 

 l.b.s. 273. 



