“are to each other. In both these, as well as in several 
“ other cases that might be mentioned, there seems to be a 
“* necessity for the establishment of natural classes, to which 
** proper names, derived from the orders best known, and 
“ differing perhaps in termination, might be given. 
“ It is remarkable that the most general character con- 
“necting the different orders of the class now proposed, 
© and which may be named from its principal order Ma/- 
“vacee, should be that of the valvular estivation (the 
‘ folding previous to expansion) of the Calyx: for several, 
“at least, of the genera at present referred to Tiliacew, in 
“which this character is not found, ought probably, for 
“ other reasons likewise, to be excluded from that order: 
“ and hence perhaps also the Chlenacew, though nearly re- 
‘lated, are not strictly referable to the class Malvacee, 
“ froin all of whose orders, it must be admitted, they differ 
€* considerably in habit.” 
Spa grandifolia has grown in the Berlin Collection to a 
tree of twenty feet in height. 
Branches covered with a long close fur. Leaves round- 
ishly cordate, unevenly denticulate, covered with a soft 
pubescence, in the young plant about half a foot in length, 
in the full-grown one about four inches long. Peduncles 
two-three-flowered shorter than the petiole. Capsules about 
10, subtruncated, long pointed, but little bigger than the 
calyx, shaggy, three-seeded. © 
