heat, light, and moisture; and in part dependent upon its 
own specific nature. The strong stem that bears its leaves 
and spathes is the same part which, in the European Arum, 
remains under ground, in the form of a round leafless tuber. 
When it is concentrated, as in the latter case, it contains 
a large quantity of nutritious fecula, mixed with an 
acrid principle, while in a diffuse state the feecula disap- 
pears, and the acrid part alone remains. Hence the arbo- 
rescent Araceous plants are simply dangerous, while the 
tuberous kinds are, both dangerous and nutritious, or, the 
dangerous parts being removed by washing, simply nutri- 
tious. 
Caladium, like many of the genera of the Botanists of 
the last age, was a heterogeneous assemblage of various 
plants, having only a sort of external, prima facie, resem- 
blance; it is now confined to certain tuberous kinds, while 
the caulescent species go into other genera, of which Philo- 
dendron is one. 
The species now represented is a native of Brazil, and 
consequently requires to be cultivated in the stove. For the 
opportunity of figuring it I am indebted to the Rev. 
Frederick Beadon of North Stoneham, from whom I received 
it ip December last. Pothos crassinervia is a very different 
plant. 
In the plate —1. is the inside of an anther; 2. its outside; 
3. a section shewing the four cells in pairs; 4. is an ovary; 
and 5. a longitudinal section of it, shewing the position of 
the ovules, and the form of the stigma. 
