234 52. POLBMOJTIACE^. — 53. CONVOLVtJLAOEiE. 



\_SWEIt! TIA peren'ms (L.), which has 2 curious fringed 

 glands at the base of each segment of the cor. (JB. B. 1441), is 

 said to have been formerly found in Wales.] 



Suborder II. Menyanthidea. 



6. ViLiAEs'iA Vent. 



1. V. nymphcendes (Vent:) ; 1. roundly heartshaped float- 

 ing wavy at the edges, ped. clustered 1-fl., cor. ciliate. — 

 Limnanthemwrn Griseb. JR. xvii. 1042. — ^Floating. St. long, 

 round, branched. L. resembling those of NymphcBa alba, but 

 much smaller. PI. yellow. Caps, sometimes 3-valved. — Still 

 places in rivers, rare. P. VII. VIII. E. 



6. Mentan'thes Linn. Buckbean. 



1. M. trifolidta (L.). — St. ascending, round, leafy. L. temate. 

 Leaflets equal, obovate, wavy. Raceme long-stalked, opposite 

 to a leaf, many-flowered. Cor. flesh-coloured, densely jnnged 

 within.— Boggy places. P. V.— Vn. E. S. I. 



Order LII. POLEMONIACE^. 



Cal. inferior, 5-parted, persistent. Cor. hypogynous, regular, 

 5-lobed. Stam. 5, unequal, on the tube of the corolla. Ovary 

 3-celled. Stigmas 3-fld. Caps. 3-ceUed, 3-valved ; valves sepa- 

 rating at the axis. 



1. PoLBMONiuM. Cal. 5-fld. 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'niitm Linn. Jacob's Ladder. 



1. P. ccerdlmim (L.) ; st. angular, 1. glabrous pinnate, leaflets 

 ovate-lanceolate pointed, panicle downy glandular.^St. 1 — 2 

 feet high, simple, hollow. L. alternate, leaflets many. Fl. many, 

 somewhat drooping, bright blue or white. — Bushy hiUy places, 

 rare. P. VIL E. S. 



Order LIII. CONVOLVULACE^. 



Cal. inferior, 5-parted, persistent, imbricate, often unequal. 

 Cor. hypogynous, regular, plaited, deciduous. Stam. 4 — 5, from 

 near the base of the corolla. Ovary of 2 — 4 cells, few-seeded, 

 surrounded by an annular hypogynous disk. Style 1, rarely 2. 

 Caps, with the valves separating from the edges of the dissepi- 

 ments or bursting transversely. 



