C L. V.] PENTANDKIA DIGYNIA. 141 



found on Ben Lawers by Mr. Dickson, Glen Isla, Clova. Eng. Bot. 

 vol. xiii. pi. 896. Eng. Fl. vol. ii. p. 30. 408. 



4. G. Amarella. Autumnal Gentian. Corolla salver-shaped, 

 five-cleft ; bearded at the mouth ; calyx with five equal segments. 



Stem from six inches to a foot high, square, erect, panicled, 



bearing numerous purplish-blue flowers. Annual : flowers in Au- 

 gust and September : grows in pastures : common. Eng. Bot. 

 vol. iv. pi. 236. Eng. Fl. vol. ii. p. 30. 409. 



5. G. campestris. Field Gentian. Corolla salver- shaped, four- 

 cleft, bearded at the mouth ; two outer segments of the calyx egg- 

 shaped, very large. Stem from two to six inches high, with 



egg-shaped, acute leaves, and purplish- blue flowers. Annual: 

 flowers in September and October : grows in dry pastures : com- 

 mon in Scotland, especially the Hebrides. Eng. Bot. vol. iv. pi. 

 237. Eng. Fl. vol. ii. p. 31. 410. 



49. ERY'NGIUM. ERYNGO. 



Flowers aggregate. Common receptacle conical, scaly, many- 

 flowered, each flower having an acute, simple, or three-cleft scale. 

 Calyx of each flower superior, of five, pointed, equal, erect leaves. 

 Petals five, equal, oblong, channelled, taper-pointed, inflected 

 about the middle. Filaments hair -like, straight, longer than the 

 corolla j anthers roundish. Germen oblong, covered with erect 

 bristles. Styles thread-like, straight, nearly erect, shorter than 

 the stamens ; stigmas simple. Fruit egg-shaped, bristly, sepa- 

 rable into two parts. Seeds oblong, nearly cylindrical, coated. 

 Name eryngion of Dioscorides. 134. 



1. E. maritimum. Sea Eryngo. Root- leaves roundish, plaited, 

 thorny ; heads of flowers stalked ; scales of the receptacle three- 

 cleft. Root long, cylindrical : stem a foot high, round, branched; 



petals bright-blue. The roots are considered stimulating and res- 

 torative. Perennial: flowers in July and August : grows in sand 

 on the sea-shore. Eng. Bot. voL x. pi. 718. Eng. Fl.voL ii. p. 35. 



411. 



2. E. campestre. Field Eryngo. Root-leaves twice or thrice 



pinnatifid ; scales of the receptacle undivided. More bushy and 



slender than the last : petals purplish. Perennial : flowers in July 

 and August: grows in waste ground, near the sea: very rare: 

 naturalized near Plymouth, and at Lismore, Waterford, Ireland. 

 Eng. Bot. vol. i. pL 57. Eng. Fl. vol. ii. p. 35. 412. 



50. HYDROCO'TYLE. WHITE-ROT. 



Flowers all perfect and regular. Calyx none. Petals five, 

 equal, egg-shaped, undivided, spreading. Filaments awl-sliaped, 

 spreading, shorter than the corolla ; anthers roundish. Germen 

 round, compressed, ribbed, smooth. Styles cylindrical, spread- 

 ing, tumid at the base, shorter than the stamens, permanent ; 

 stigmas simple. Fruit round, compressed, crowned with the 

 permanent styles. Seeds hemispherical, tumid, each with pro- 

 minent angles. Named from hydor, water, and cotyle, a cup. 



135. 



1. H. vulgdris. Marsh Penny. White-rot. Leaves round, shield- 

 shaped, smooth, cleft at the base ; umbels somewhat aggregate ; 



