DISEASES OF PLANTS. 861 
Of the first kind Adquilegia vulgaris ; Narcissus 
Pseudonarcissus, may serve as instances. In the first 
the petals are completely annihilated, and the spur 
only increased in number. In this case, then, many 
spurs are inclosed in one another like so many paper 
bags. In Narcissus the petals remain natural, but 
ihe nectarium is multiplied. 
The same plants likewise present instances of the 
second kind ; in Aquilegia, the spurs are in this case 
entirely wanting, and the petals increase in number ; 
in the same way Narcissus may souietimes want the 
nectarium, and the petals become full. The violet 
and the larkspur become full, like those two. 
Snseire 
Vlowers which have one or a few stamens only, 
will seldom be full. When it happens, it is only in 
such plants as have a monopetalous corol. As an in- 
stance of this kind, I shal! mention Jasminum Sam- 
bac. Some of the natural families never yet pro- 
duced any double or full flowers. Such are, 
Palmae, (§ 143, 1). 
Mosses, (§ 143, 56). 
Algaeés (§ 143, 57). 
Filices; (§ 143,55). 
Hungisety Gb. G8); 
Calmariae, (ib. 3). 
Gramina, (ab. 4). 
Apetalae, flowers without petals. 
Amentaceae, (ib. 50.) 
Vripetaloidae, (ib. 5.) 
Orchi. 
