Convolvulus. PENTANDRIA MONOGYNIA. 467 



1 take no notice of the stigma when so formed ; it will conse- 

 quently be understood fo consist of two round lobes, when 

 not mentioned. In this genus there is but one species (C. fla- 

 gellijormis,) that can be said to have any thing like an entire 

 stigma and in Jpomoea only one, viz. I phoenicea, I do not 

 therefore think it would answer any valuable purpose to make 

 a double stigma the essential, generic mark of Convolvulus, 

 and a single capitate one, that of Ipomoea. But those with 

 an entire seed vessel, may be advantageously formed into a 

 distinct family, which I have done in the next genus, Lett- 

 somia. 



SECT. I. Twining with undivided Leaves. 



l.C. gangeticus. R. 



Perennial, twining, extensive. Leaves round-cordate, en- 

 tire, obtuse. Peduncles solitary, from one^o four-flowered. 

 Leaflets of the calyx reniform, increasing in size with the 

 capsule, and hiding it. Corol with nearly entire margins. 



A native of the banks of the Ganges, where it blossoms du- 

 ring the cool season ; Avhen its extended branches, and nu- 

 merous, very large, bright, pink-coloured flowers are highly 

 ornamental ; seeds ripe in March. 



Stems shrubby, twining up and over trees to a great ex- 

 tent ; young shoots round, pale green, and a little hairy. 

 Leaves petioled, re-entering, round-cordate, entire, often ernar- 

 ginate, nearly smooth above ; villous, and dotted underneath, 

 and there strongly marked with many, nearly simple, paral- 

 lel veins; length and breadth about three or four inches. 

 Petioles channelled, nearly as long as the leaves. Peduncles 

 axillary, solitary, shorter than the petioles, from one to three- 

 flowered. Bractes oblong, opposite, caducous at a very ear- 

 ly period. Leaflets of the calyx ob volute, reniform, emar- 

 ginate, with thin, membranaceous edges, increasing in size 

 with the fruit, and covering it completely at all times. Germ 

 four-celled, with one ovulum in each cell, attached to the 



Dd2 



