SYNANTHY IN THE GENUS LONICERA. 463 
mucilage and traversed by bands of cellulose, c/.; w.., ordinary 
epidermal cell; pal., commencement of palisade-cells. 
Fig. 9. Crotalaria albida. Section of upper epidermis, showing very deep 
mucilage-cells. > 400. 
muc., lumen of cell; iw., inner wall of great thickness containing 
the mucilage with stratified appearance due to bands of unaltered 
cellulose ; es., mesophyll ; we., ordinary epidermal cell. 
Fig. 10. Glochidion zeylanicum. Diagram of transverse section of the middle 
part of internode of stem. x 20. 
ep., epidermis ; c., cortex; p., pith with central cavity (unshaded). 
pA. and xy., phloem and xylem, respectively, of main stele. 
ph. and zy.,, ,, » ” of lateral steles. 
Fig. 11. Hedyotis verticillaris. Longitudinal section of stipular gland. x 100. 
ep., epithelial layer of gland; s., stalk of gland; stip., main tissue 
of stipule ; r., raphide-cell. 
On the Synanthy in the Genus Zonicera. By E. A. Neweu 
Arser, M.A., F.G.S., Trinity College, Cambridge ; Univer- 
sity Demonstrator in Paleobotany. (Communicated by 
A. C. Srwarp, Esq., F.R.S., F.L.S.) 
[Read 4th December, 1902.] 
TaE morphological character known as synanthy, or the union 
of two or more members of an inflorescence, is in nature by no 
means rare, although it can hardly be said to be of common 
occurrence. It is exhibited normally in plants belonging to 
many widely separated orders. Among these, the genus Loni- 
cera, belonging to the Caprifoliacex, is remarkable both for the 
number of species which possess this character and for the 
different ways in which the synanthy is effected. 
The genus has recently been divided into three groups as 
follows * :-— 
i. Caprifolium, DC. 
ii. Nintooa, Sweet. 
iii. Xylosteum, DC.t 
* Fritsch (1891), The numbers in brackets after the authors’ names refer to 
the date of the memoir, which will be found quoted in the bibliography at the 
end of this memoir. 
t This section was originally founded by Tournefort in 1700 as Xylosteon, 
and this reading has been followed by De Candolle and others. I have, how- 
ever, adopted here, on the authority of Bentham and Hooker (1873), p. 11, the 
form Xylosteum, 
