We entirely agree with our friend Dr. Hooker, in con- 
sidering. S. levigata of Humboldt and. Kunth identical 
with the S. involucrata of Cavanilles. We do not discover 
the slightest difference between those two supposed 
species. 
Stem exceeding the human stature, 4-cornered, some- 
what shrubby. Leaves cordate-ovate, acuminate, ser- 
rated, smooth, with purplish veins. lowers in capitate 
thyrses, bright rich purple or lake colour, growing by 
threes out of the axille of large, ovate, deciduous, coloured 
bractez. Calyx coloured, 2-lipped; the upper lip acute, 
entire, the lower shorter, with two obscure teeth. Corolla 
inflated, smooth, an inch and more long, the helmet downy, 
the lip rounded, with 3 lobes. Anthers small, white, 
1-celled, the connectivum elongated downwards into a 
sort of semisagittate straight process. Style pubescent. 
J. 1. 
