HOUSE, THE GENUS IPOMCEA 



225 



Corolla white or cream-colored or tinged with magenta 

 below. 



Leaf-blades subtruncate, plicate, glabrous; ped- 

 uncles shorter than the petioles. 

 Leaf-blades cordate, not plicate. 

 Sepals about 7 mm. long. 



Stems and sepals setaceous-hispid. 

 Stems and sepals glabrous. 

 Sepals 10-20 mm. long, or longer. 



Foliage white-tomentulose or silvery-pubes- 

 cent beneath. 



Corolla densely pubescent, the white- 



canescent sepals 18-20 mm. long. 

 Corolla glabrous; sepals 12-16 mm. long. 

 Foliage glabrous or pubescent, not silvery. 

 Sepals aristate; capsules ovoid, apiculate. 

 Sepals blunt or obtuse. 



Calyx 10 mm. thick or more at flowering 



time; sepals oblong. 

 Calyx 5-6 nun. thick; sepals lanceolate; 

 leaves minutely pubescent to velvety- 

 pubescent in var. 

 Corolla blue, pinkish or purple. 



Sepals more than 10 mm. long (except no. 94). 

 Leaf-blades silveiy-pubescent beneath or velvety- 

 pubescent. 



Corolla 7-10 cm. long; leaf-blades tomentose 

 beneath. 



Leaf -blades entire or 3-lobed. 

 Leaf -blades palmately 5-lobed. 

 Corolla 6 cm. long or less. 



Leaf-blades silvery-pubescent beneath, ob- 

 long, rounded or subcordate at the base. 

 Sepals oval, 10-13 mm. long. 

 Sepals 6-8 mm. long. 

 Leaf-blades densely velvety-pubescent 

 above and below, broadly ovate and 

 equally 3-lobed. 

 Leaf-blades glabrous or finely pubescent. 



Sepals tomentulose, 12-14 mm. long; leaf-blades 



triangular-ovate and lobed. 

 Sepals glabrous or minutely pubescent. 



Leaf-blades finely pubescent, oblong-ovate to 



oblong-lanceolate, shallowly cordate. 

 Leaf-blades glabrous above. 



Sepals equal; corolla rose-purple to white, 



8-10 cm. long. 

 Sepals unequal; corolla blue, 5-6 cm. long. 



83, /. plicata. 



84. 

 85. 



91. 

 92. 



I. crinita, 

 I. populina. 



I. jalapa. 

 I. leonensis. 



