101 
Plectranthus foetidus(?) (fam. Labiatae), of which some leaves 
have lost their apex partly or altogether, and: 
Lansium domesticum (fam. Meliaceae), of which the fruits — called 
Doekoe — are edible. Mr. Smith says respecting one leaf preser- 
ved by him: apex bifid, midrib undivided; each of the apices 
has a lateral vein, springing near the end from the midrib. 
This case markedly calls to mind the double-topped leaves 
in the ordinary meaning; still the difference is distinct enough ; 
in two-topped leaves properly so called there are two primary 
apices, whereas in the cases under discussion the originally 
simple apex was somehow destroyed and subsequently more 
or less completely replaced by two other ones. The practical 
difference consists in the nerves coming down from the apices 
being in the latter case lateral ones with respect to the mid- 
rib, whereas in the former their very confluence originates 
so to say the midrib. 
§ 2. Bifurcation of the apex. 
Next follow some cases in which there are two apices and 
two midribs uniting into one, as just explained. 
In fig. 15 an abnormal leaf of Cleghornia cymosa (fam. Apocy- 
neae) is represented. Not until a long way downward the ori- 
ginally free nerves unite and they do not unite completely 
until the petiole has been reached. And here I may point to 
the ,domatia’’ in the angles of some of the nerves; in size 
they are scarcely equalled by those of Hypaphorus subumbrans 
(the shadow-tree of the Coffee) and Coffea arabica '). 
Almost the same is shown by the double-topped leaf of 7’hun- 
bergia spec. (fam. Acanthaceae) (fig. 16) and the allied Heza- 
centris Mysorensis (fig. 17). Fig. 19 represents the terminal leaf- 
let of Connarus falcatus (fam. Connareae), but although the 
apices are distinctly separated in this case, the midrib gives 
1) It would seem that the domatia of the Coffee-tree have grown smaller in the 
hothouses of Europe. In the Amsterdam Botanical Garden, at least, they are 
hardly visible in the specimens there grown. 
