+ 
self Fumariaceae. Again, Schlechtendal, in Linnaea, in 1826, re- ~~ 
ferred to the “ Melanthiaceen,” but the Latin name first appeared 
in 1830 in Lindley’s Natural System. 
Bartling, in 1830 (Ord. Nat. 144), proposed a group “ Cen- 
taureacea.” This form was probably intended for the neuter 
plural, but might be the singular of Centaureaceae. In any event 
it does not fulfil the requirements of this rule. However, in 1873, 
Pfeiffer, in his Nomenclator Botanicus, referring to Bartling, spells 
the name Centaureaceae, thus duly publishing it. 
In 1825 Nees von Esenbeck, making a list of the plants belong- 
ing to the family which he called « Gesneriées,” entitled the list 
« Generum familiae Gessneriacearum brevis expositio.” Although 
the name Gessneriaceae occurs nowhere else in the article, and in 
this instance only in the genitive case, this constitutes a true pub- 
lication of the name according to the rule under consideration. 
Rule 4. Citation. There are many illustrations of this rule in 
the accompanying list. 
Rule 5. While this rule brings family nomenclature into line 
with specific and generic naming, it is desirable for another 
reason. In 1759 Bernard de Jussieu laid the foundation of the 
Natural System, which is now so universally accepted. As 2 
nothing on the subject was published between 1753 and 1759,the 
latter date might have been taken as a starting-point but for the 
convenience of uniformity. 
The following list has been prepared in accordance with, and 
in illustration of, the proposed rules. The omissions may be 
many ; the errors, it is to be hoped, are few. Additions to this 
list and corrections of it will be gratefully received. 
It will be well to remember, however, that many of the refer- 
ences in published books are not to be trusted, for they refer to 
places where the group is described, it may be under a very differ- 
ent name. 
List of the Natural Families According to the Classification 
Adopted in Engler and Prantl’s Natuerlichen Pflan- 
zenfamilien. Corrected in accordance 
with the proposed rules, 
This list includes only the Spermatophyta or seed-producing 
plants; it includes only names which end in -aceae; it includes 
only names which are formed, directly or indirectly, from the | 
