366 Linnean Society. 
species flowered at Farnham, as described by Sir James Edward 
Smith in the 6th volume of the Linnean Transactions, a considerable 
number of the same sex have flowered in this country. Five indivi- 
duals might be mentioned, which are now in a flowering state. On 
the other hand, only one male plant is known to have flowered in 
our island. This was formerly at York, and is now in the Botanic 
Garden at Sheffield. Its cone, or rather spike, nearly a metre in 
length, is preserved in the museum of the Yorkshire Philosophical 
Society, and exhibits in a very striking manner the affinity of this 
genus to the rest of the Cycadee, whilst the female cone of Cycas 
differs greatly from that of all the other genera. 
Genus Macrozamia. 
Macrozamia spiralis.—The genus Macrozamia, the scales of whose 
cone, whether male or female, are distinguished by terminating in a 
single spine, directed upwards, appears to be very closely allied to 
the Dioon of Professor Lindley. It is difficult to distinguish the young 
seedlings of these two genera. ‘The only perceptible difference is, 
that in Macrozamia the leaflets are contracted at the base, and are 
more remote from one another than in Dioon. Also in both of these 
genera the leaves of the young plants differ most remarkably from 
those of the same plants in the adult state. Macrozamia, as well as 
Dioon, approaches Cycas in the circumstance, that the leaflets are 
decurrent, whereas in the remaining genera, Hncephalartus, Zamia 
and Ceratozamia, they are not at all decurrent, but are contracted at 
the base and join the midrib of the leaf by a distinct articulation. 
The decurrent leaflets of Macrozamia spiralis are especially apparent 
in the young plants. 
Genus ENCEPHALARTUS. 
Encephalartus brachyphyllus.—A male plant flowered last year at 
Chatsworth. The cone appeared early in May, and was full-grown 
in two months. 
Encephalartus Altensteinii.—There are at Chatsworth two splen- 
did specimens of this species, which are labeled as such. Some of 
their leaves are two metres long. One of these two specimens has 
thrown out bulbs, producing offsets of considerable size. On com- 
paring the leaves of the offsets with those of the parent plant, the 
former are observed to be much more spinous and smaller than the 
latter, the number of the leaflets also being much less. This indi- 
vidual therefore affords a decisive proof that such diversities in the 
leaves may depend upon the age of the plant, or upon other circum- 
stances. Hence it may be inferred, that many individuals, which in 
our conservatories are distinguished by other names, and especially 
many of those called ‘‘Zamia pungens,” or ‘‘ Encephalartus pungens,” 
belong to the Encephalartus Altensteinii of Lehmann and Miquel. 
Lehmann assigned this name and made his description of the species 
from the study of specimens directly imported from South Africa. 
But if the view here taken be correct, the species was already com- 
mon in Europe under other names. A plant called “ Zamia pun- 
