CORRESPONDENCE. 2 1 3 
credit of having first of all pointed out the identity of that genus with 
Deplanchea, shortly before established. The rudiment of a fifth sta- 
men seems absent in Diplanthera tetraphylla. But should the fruit of 
BeplancJiea not exhibit any difference from that pointed out in Di- 
plantkera (conf. Fragm. Phytogr. Austr. v. 72), then the New Cale- 
donian plant would rank as a second species under the name of ZW- 
planthera Deplanchei. 
CORRESPONDENCE. 
A New Arrangement of Phanerogamous Plants with especial reference to Re- 
lative Position, including their Relations with the Cryptogams." 
Mount Vernon, Hampstead, Mag 20, 1867. 
With reference to this work, I beg to notice that although twelve months 
have elapsed since it was published, I have not hitherto heard of a single ob- 
jection to the arrangement of the Phanerogamous plants, either Endogens or 
Cogens, which form the main part of the work, the arrangement of the Cryp- 
togams being only subordinate, as the title of the work implies. 
-I here is, however, apparently an objection in the otherwise entirely favour- 
able review of the work which appeared in the 'Journal of Botany,' in Decem- 
ber last, Vol. IV. p. 379. The party, however, who wrote that review informs 
me "lat he has no objection to name against the arrangement of either the 
ndogens or Exogens, though he may not quite agree to all the particulars, 
an d I therefore have not heard of any objection from him; but his critical 
objections, he informs me, referred more especially to the placing of the higher 
r yptogams ; but whether the proposed arrangement of the Cryptogams is 
practicable or not, is entirely immaterial to the arrangement of the Endogens, 
cogens, and G-ymnosperms, because, \i' they were all removed, the arrange- 
ment of these classes would remain unaltered, as they form no part of the 
system of Phanerogamous plants. His objections to the placing of the higher 
tr jtogams in the positions they occupy, he informs me, depend on a different 
Xlew °f the nature of a spore to that which I take, and it remains therefore for 
uture researches to show which view is the more correct. The positions of 
-ycopodiacea* and Marsiliacea, I fully admit, rest on insufficient evidence, and 
ar e, so far, clearly open to criticism, and their positions are only provisional ; 
up to the present time I see no sufficient reasons for alterations. This 
iificulty, it appear to me, could be very satisfactorily avoided by placing these 
lilies with the other Vascular Cryptogams in Table Y., but I hope their 
Present positions can be maintained. 
An the prospectus it was mentioned that " the principles of the proposed 
a ^ngement might be confidently expected to lead directly to the accom- 
Pishment of the long-sought Natural System," and up to the present tim- 
