216 52. POLEMONIACEH.—53. CONVOLVULACEZ. 
3-celled. Stigmas 3-fid. Caps. 3-celled, 3-valved, valves sepa- 
rating at the axis. 
1. Pouemonium. 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. Potemonium Linn. 
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 nu- 
merous. Fl. numerous, somewhat drooping, bright blue or white. 
—Bushy hilly places, rare. P. VII. Blue Jacob’s Ladder. 
Order LITI. 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. Convotvuxus. 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. 1. 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. Convotvuxus Linn. 
1. C. arvensis (I..); 1. arrowshaped with acute lobes, peduncles 
mostly 1-flowered, bracts minute distant from the flower.—Z. B. 
312.—St. numerous, angular, twining or prostrate, leafy, branch- 
ed. Peduncles sometimes 2-flowered. Cor. beautifully variegated 
with pink and white. Caps. 2-celled. Roots descending re- 
markably deep. Plant glabrous or (8. hirtus Koch) st. and 1. 
downy.—Fields and hedges. P. VI.—VIII. Small Bindweed. 
2. C. Sepium (L.); 1. arrowshaped with truncate lobes, pe- 
duncles 1-flowered square, bracts large cordate close to the flower. 
