34 ADHESION 
tions an instance wherein the spathe of Narcissus h- 
florus was partially twisted in such a manner that the 
lower surface of its median nerve was adherent to the 
corresponding surface of one of the sepals, mid-rib to 
mid-rib, thus apparently confirming a law of G. de 
Hilaire, that when two parts of the same individual 
— unite, they generally do so by the corresponding sur- 
faces or edges, but the rule is probably not so general 
in its application as has been supposed. 
Adhesion of foliar to axile organs —T he appendicularorgans 
may likewise be found united to the axile ones. This 
union takes place in many ways; sometimes the leaves 
do not become detached from the stem for a con- 
siderable distance, as in the so-called decurrent leaves, 
at other times the leaves are prolonged at their base 
into lobes, which are directed along the stem, and are 
united with it. Turpin records a tendril of a vine 
which was fused with the stem for some distance, and 
bore leaves and other tendrils. Union of the leaf or 
bract with the flower-stalk is not uncommon. It 
occurs normally in the Lime and other plants. 
Adhesion of the sepals to the petals is spoken of by Morren 
as calyphyomy, kaAvé g¢vona.! Moquin cites an 
instance in Geraniwm nodosum, 11 which one petal was 
united by its lower surface to one of the segments of 
the calyx. A similar circumstance has been observed 
in Petunia violacea by Morren. Duchartre describes 
an instance wherein one of the outer sepals of Cattleya 
Forbesii was adherent to the labellum.’ 
Adhesion of the stamens to the petals is of common occur- 
rence under natural circumstances. Cassini has de- 
scribed a malformation of Centawrea collina, m which 
two of the five stamens were completely grafted with 
the corolla, the three others remaining perfectly free. 
Adhesion of the petals to the column is not of infre- 
1 «Bull. Acad. Belg.,’ vol. xix, part ii, p. 335. 
“ * Bull. Soc. Bot. Fr.,’ 1860, p. 25. 
