108 PENTANDRIA— DlovxiA. \_Gentiana. 



41. iLLECEBnuM. Linti. Knot-grass. 



1. I. verticilldtum, L. (whorled Knot-grass^; stems procum- 

 l)ent filiform glabrous, leaves broadly ovate, flowers axillary in 

 crowded whorls. E. Hoi. t. 895. 



Marshy or boggy ground, in Devonshire and Cornwall. Tl. ,Tuly. 

 If. — A small plant, with Sj^reailing and procumbent stems; white, 

 scariose s<?/»?/fcs jagged at the margin ; and numerous \\\\\'C\%\\ flowers. 



42. Thesium. Linn. Bastard- Toadflax. 



1. T. linoplnjllum, L. {lint-leaved Bastard-Toadjlax); leaves 

 linear-lanceolate, racemes panicled leafy, peduncles and pedicels 

 bracteated, fruit nearly globose. E. Bat. t. 247. 



Elevated chalky pastures, Cambridgeshire, Norfolk, Suffolk and Dor- 

 setshire. Ranmar hills, near Dorking, Surrey. Fl. July. '^■. — Roots 

 woody, sending forth several herbaceous, spreading, leafy stems, termi- 

 nated by the somewhat paniculated leafy racemes. Segments of the 

 perianth white. Fruit strongly ribbed. 



PENTANDRIA— DIGYNIA. 



43. SwERTiA. Linn. Felwort. 



1. * S.perennis, L. (niarsh Felwort or Swertia); radical leaves 

 nerved ovate attenuated at each extremity, peduncles corymbose, 

 segments of the corolla lanceolate acute. E. Bot, t. 1441. 



Wales? Dr Bichardson, according to Hudson. But there is reason 

 to apprehend some mistake, and that it was never found wild in Britain. 



Fl. Aug. n. 



44. Gentiana. Linn. Gentian. 

 * Cor. sidjcampanulate, the mouth naked. 



1. G. *acaulis, \j. {dwarf Gentian) ; leaves oblongo-lanceo- 

 late acute, flower solitary 5-cleft about as long as the quadran- 

 gular stem. E. Bot. t. 1594. 



Near Haverford-West, 31. de St\Amans\; — the outcast of a garden, 

 not even naturalized. Fl. June, July. 11. 



2. G. Pneumondnthe, L. {marsh Gentian); leaves linear, 

 flowers terminal and axillary sessile, corolla 5-cleft. E.Bot.t.28. 



Moist heathy places, in several parts of England. Fl.^Aug., Sept. 

 "U, — Stem ujiright, 4 to 6 or 8 inches tall. Corolla large, deep blue 

 within, having 5 broad greenish lines corresponding with the segments. 



** Cor. someivhat fiDinel- or salver-shaped, tcith 5 large and 5 

 smaller segments. 



3. G. verna, L. {Spring Gentian); stem 1 -flowered, leaves 

 crowded ovate, corolla salver-shaped with 5 large and 5 small 

 alternate bifid segments. E. Bot. t. 493. 



Alpine pastures, rare ; between Gort and Galway, Ireland : on lime- 

 stone rocks in the Barony of Barren in the same country. Middleton 

 in Teesdale, Durham. Fl. April, If. 



4. G. nivalis, L. {small alpine Gentian) ; branches single- 



