224 53. CONVOLVULACEJE. 



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 higb, 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, with 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 5-cleft. Cor. roundish-urceolate or 

 bellshaped, 4 5-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. 



