ON THE FRUIT AND SEED OF THE JUGLANDE®. 247 
may also observe that the stipuliform appendages also resemble 
leaf-lobes in being slightly conduplicate. 
These considerations seem to throw some light on the differ- 
ences between the leaves of Viburnum Lantana and V. Opulus, 
the hairiness of the former and the smoothness of V. Opulus, on 
the lobed form of the leaf in the latter, and, lastly, on the 
presence of the honey-glands and the peculiar stipuliform append- 
ages in V. Opulus, neither of which oecur in V. Lantana. 
In support of the above suggestions, I may refer to the very 
interesting analogy afforded—in a totally different family—by 
the genus Spirea. Here we find some species with entire, some 
with pinnate, leaves, while those of S. opulifolia, as the name 
denotes, closely resemble those of Viburnum Opulus. Now the 
entire-leaved species of Spirea, like those of Viburnum, have 
no stipules; while S. opulifolia agrees with Viburnum Opulus 
not only in the shape of the leaves, but in the mode of folding 
in the bud, and also in the presence of subulate, acuminate, 
stipuliform appendages. 
On the Fruit and Seed of the Juglandeæ. By the Rt. Hon. 
Sir Joun Léf$socr, Bart., M.P., F.R.S., D.C.L., LL.D., 
F.L.S. 
[Read 20th February, 1890.) 
PrEROCARYA. 
Ix a previous memoir I have figured the mature seed and seedling 
of Pterocarya caucasica (Journ. Linn. Soc., Bot. vol. xxii. pp. 359 
& 386). They are very peculiar, and it may be interesting to 
describe some of the earlier stages in the development of the 
fruit. I have to thank Mr. Lynch for his kindness in keeping 
me supplied with specimens of the fruit in its various stages from 
the tree in the Cambridge Botanie Gardens. It will be remem- 
bered that the seed (Journ. Linn. Soc., Bot. vol xxii. p. 386, 
fig. 118) is shaped somewhat like an anvil, with four short, 
wide legs; and that the seedling is characterized by having the 
cotyledons bifid, each division being again bilobed. 
Pterocarya caucasica flowers with us early in May. The 
