CtASS IV. ORBER I.J EXACUM. 191 



small temiinal heads, surrounded by linear downy hractece ; the mar- 

 gins, especially near the base, ciliated, with long, shining, white hairs. 

 Corolla small, bright blue. Fniit smooth, large, and conspicuous. 



Habitat. — Near Devonport — Mr. C. A. Johns, 1830 ; " but where, 

 however, the plant is now nearly, if not quite lost, in consequence of 

 the construction of a railroad." 



Annual. 



This species is frequent on the opposite Continent, and appears to be 

 occasionally introduced into this country. Although we have here 

 figured and described it from specimens communicated by Sir W. J. 

 Hooter, we are nevertheless of opinion that it ought not to be admitted 

 into the British Flora, except supplementarily. 



3. A. Cynan'chica, Linn. (Fig. 242.) small Woodruff. Leaves li- 

 near, four in a whorl, the two opposite leaves gradually diminish- 

 ing in size in the whorls towards the upper part of the stem. 



English Botany, t. 33. — English Flora, vol. i. p. 198. — Lindley, Sy- 

 nopsis, p. 130. — Hooker, British Flora, vol. i. p. 69. 



Root fibrous, and usually putting out tufts of numerous square stems, 

 from three to six inches high, procumbent, and branched at the base, 

 becoming erect, smooth. Leaves four in a whorl ; the lower ones small, 

 ovate, and mostly regular ; the upper ones linear, having the two oppo- 

 site ones gradually reduced to small lanceolate stipules, quite smooth, 

 with the margins somewhat reflcxed. Inflorescence in small terminal 

 branched panicles, of white or lilac flowers. Coro//« with four acute, 

 three-ribbed, spreading segments. Fruit granulated. 



Habitat. — Warm situations, especially in chalky districts. We have 

 fine specimens also, grown on clayey soils, from Brodsworth, near 

 Doncaster, and Lincoln Common. It is not found in Scotland or 

 Wales. Abundant on limestone rocks about Corrofin and other places 

 in the County of Clare, and the large Island of Arran, Ireland. 



Perennial ; flowering in June and Julj\ 



This plant was formerly used both as an outward and inward remedy 

 for the cure of Squinancy, or Quinsy ; hence its specific name. It 

 appears, however, in modern times, to have entirely lost its reputation, 

 even among the domestic remedies. 



GENUS VIII. EXA'CUM. Linn. Gentianella. 



Nat. Orel. Gentia'nejE. 



Gen. Char. Ca/yx of one piece, with a four-cleft extremity. Corolla 

 four-cleft, salver-shaped, with a globose tube. Anthers bursting 

 longitudinally. Stigma capitate, entire. Capsule one-celled, 

 two-valved. Seeds numerous, attached to the infiexed margin of 



