52 ENGLISH BOTANY. 



leaves have extremely long petioles in proportion to the size of the 

 leaflets. 



Dense-flowered Trefoil. 



French, Trejle Ftouffe. 



We have found this curious plant on the sandy sea-coast on our eastern shores, 

 buried in sand so completely that even its seeds are perfected subterraueously and 

 witliout light. On putting down a knife or a stick, the whole plant may be raised, and 

 then its flowers and fruit come into view. 



SPECIES XIV.— T RIPOLIUM STRICTUM. WaMst. & KU. 



Plate CCCLX. 



T. Iffivigatum, Desf. Fl. Atl. Vol. II. p. 195. Gr. & Godr. Fl. de Fr. Vol. I. p. 416. 



Rootstock none. Stems few, erect or ascending, simple and 

 straight, or slightly branched and flexuous. Lower leaves on 

 rather long stalks, with obovate leaflets rounded at the apex ; 

 upper leaves shortly stalked, with elliptical-strapshaped sub-acute 

 leaflets ; all with the margins denticulate ; veins prominent, the 

 lateral ones straight. Stipules adnate for about half or two-thirds 

 of their length, ovate, acute, with denticulate margins. Flower- 

 heads terminal and axillary, on stalks exceeding their own length 

 and about as long as the leaves from which they spring, solitary, 

 ovoid-globular. Flowers sub-sessile, not reflexed in fruit. Calyx- 

 tube bell-shaped, 10-ribbed, glabrous, open at the throat, swollen in 

 fruit ; teeth triangular, acuminate, sub-spin escent, the four upper 

 about equal to the tube, the lower one exceeding it. At length 

 spreading-recurved. Corolla a little longer than the calyx, shri- 

 velling or deciduous. Pod 2-seeded, a little longer than the calyx- 

 tube. Plant glabrous. 



On dry banks. Very rare. It has only occurred at Llandewed- 

 nach, on old Lizard Head, Cornwall. It has also been reported 

 from Anglesea, by Dr. Dickenson, who fovmd it " on a wild, un- 

 cultivated heath, about three miles north of Aberff'raw, Anglesea, 

 nearly in the centre of the island, in abundance, covering a space 

 of 50 yards square, and to all appearance undoubtedly indigenous." 

 — (Bot. Gazette, Vol. I. p. 28.) It also occurs in the Channel 

 Islands. 



England. Annual. Early Summer. 



Stems 1 to 6 inches high in the Cornwall and Channel Islands 

 specimens, but sometimes 1 foot high or even more in Continental 

 ones. Leaflets of the upper leaves ^ to 1 inch long, much narrower 



