224 53. CONVOLVULACE^. 



1 . PoLEMONiuM Linn. Jacob's Ladder. 



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

 ovate- lanceolate pointed, panicle downy glandular. — E. B. 14. 

 — St. 1 — 2 feet high, simple, hollow. L. alternate, leaflets 

 many. Fl. many, somewhat drooping, bright blue or white. — 

 Bushy hilly places, rare. P. VII. 



Order LIII. CONVOLVULACE^. 



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

 Cor. hypogynous, regular, plaited, deciduous. Stam. 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. 



* With leaves and cotyledons. 



1. Convolvulus. Cor. bellshaped, mth 5 prominent plaits 

 and 5 shallow lobes. Style simple ; stigmas 2. Caps. 2 — 4- 

 celled ; cells 2-seeded.— G. F. G. Gam. i. 63, 64. 



** Without leaves or cotyledons. 



•2. CuscuTA. Cal. 4 — 6-cleft. Cor. roundish-urceolate or 

 bellshaped, 4 — 6-parted, with as many scales alternating 

 with the segments at the base within. Stam. 4 — 5. Styles 

 2, rarely 1 . Caps, bursting transversely, 2-celled, 4-seeded. 

 — G. F. G Gam. i. 65. 



1. Convolvulus Linn. Bindweed. 



1 . C. arvensis (L.) ; 1. arrowshaped with acute lobes, peduncles 

 mostly 1-flowered, bracts minute distant from the flower. — E.B. 

 312, — St. many, angular, twining or prostrate, leafy, branched. 

 Peduncles sometimes 2-flowered. Cor. beautifully variegated 

 with pink and white. Caps. 2-celled. Roots descending re- 

 markably deep. Plant glabrous, or st. and 1. downy. — Fields and 

 hedges. P. VI.— VIII. 



2. C. sepium (L.) ; 1. arrowshaped with truncate lobes, pe- 

 duncles 1-flowered square, bracts large cordate close to the flower. 

 — E. B. 313. Calystegia R. Br. — St. twining, many feet long, 

 with large rather distant leaves. Fl. solitary, axillary, large, 

 white, rarely pink. Bracts quite inclosing the calyx. Fr. im- 

 perfectly 2-celled through the shortness of the dissepiment. — 

 Hedges and thickets. P. VII. VIII. 



