( 325 ). 
XVIII. Description of a new Genus in the Natural: Or of 
Rubiacee, called. E. Ese. Dy Richard Anthony Salis , Esq. 
Read February 4, 1806. 
Peruaprs one of the most interesting modern additions to our 
knowledge of the Natural Affinities of Vegetables,has been made 
among the Rubiacez. I presume to call it modern; for though 
Bernard de Jussieu arranged the plants of this order in the Tri- 
ánon garden with great purity, so long ago as 1759, other bota- 
nists continued to mix several discordant genera with it, till his 
nephew's incomparable work appeared, shining like the morning 
star, the harbinger of day. By his labours, those genera which 
really belong to it are now clearly defined ; and as far as what 
little knowledge I have gained of them enables me to judge, his 
artificial sections rarely break the links of that natural chain 
by which they hang together. 
Some useful corollaries. may be deduced by the botanist wio 
studies the various organizations of this extensive tribe of plants 
philosophically. From a comparison of the most anomalous, it 
appears to me - the general rule laid down by Linné res- 
pecting genera, n t be still more closely adhered to in natural 
orders. I would say, characterem fluere e ordine non ordinem e cha- 
ractere, in the strongest sense of the words: for there cannot be 
the. smallest. doubt that Usteria, which has Pericarpium superum, : 
he Rubiacee, though it is the only genus of them. yet 
with such a character. Our great master, indeed, in 
