224 51. GENTIAUACE^. 52. POLEMONIACE^. 
flowering shoot. Fl. rather large, vivid blue. — Barren limestone 
districts. Teesdale, Durham. Burriji, Clare; and between 
Gort and Galway. P. IV.— VI. E. I. 
•* Cor. heUshajied, its throat naked. 
5. G. Pneumonan'the (L.) ; cor. 5-cleft, cal. entire with linear 
blunt lobes, mostly solitary slightly stalked, I. linear blunt.— 
E. B. 20. — St. 4 — 10 in. high, leafy, simple, erect or ascending, 
Fl. very large, deep blue within and with a broad gi-eenish band 
down the middle of each segment. — Moist turfy heaths. A. 
VIII. IX. E. 
\_G. acaulis (L.) E. B, 1594 is not a native.] 
[ S WER ' TIA per en 'nis (L. ) , which has 2 curious Mnged glands 
at the base of each segment of tbe cor. {E. B. 1441), is said to 
have been formerly found in Wales.] 
Suborder II. MenyantMdece. 
5. ViLLAEs'iA Vent, 
1. V. 7iymph(Eoides (Vent.); 1. opposite roundly heartshaped 
floating wavy at the edges, ped. clustered 1-fl., cor. ciliate. — 
E. B. 217. Limnanthcmum Griseb. R. xvii. 1042. — Floating. 
St. long, round, branched. L. resembling those of Nymphcea 
alba, but much smaller. Fl. yellow. Caps, sometimes 3-valved. 
— Still places in rivers, rare. P. VII. VIII. E. 
6. Mentan'thes Linn. Buckbean. 
1. M. trifolidta (L.).—E. B. 49i5. — St. ascending, round, leafy. 
L. temate. Leaflets equal, obovate, wavy. Kaceme long- 
staUced, opposite to a leaf, many-flowered. Cor. flesh-coloured, 
densely fringed within. — Boggy places. P. V. — VII. E. S. I. 
Order LII. POLEMONIACE^. 
Cal. inferior, 5-parted, persistent. Cor. hypogynous, regular, 
5-lobed. Stam. 5, unequal, on the tube of the coroUa. Ovary 
.3-celled. Stigmas 3-fid. Caps. 3-ceUed, 3-valved ; valves sepa- 
rating at the axis. 
1. PoLEMONiuM. Cal. 5-fid. Cor. rotate, with a short tube 
and 5-lobed limb ; throat nearly closed by the dilated bases 
of the filaments.— G. F. G. Gam. i. 62. 
1. Polemo'nittm Linn. Jacob's Ladder. 
1. P. ccenUcum (L.); st. angular, 1. glabrous pinnate, leaflets 
