175 
4 
(3-) The Table 13 bears the short, descriptive phrase “ Beureria 
petalis coriaceis oblongis, calycis foliolis reflexis,” which isa poly- 
nomial specific name rather than a generic definition. As no 
species are cited or described, Beureria, were it not to be rejected 
for other reasons, must be relegated to the limbo of “ nomina 
nuda.” 
The species of Biuz¢tneria, all North American, are as follows : 
(1.) Bérrnerta occIpENTALIS (Hook. & Am.) Greene, Erythza, 1: 
207 (189 3). 
Calycanthus occidentalis Hook. & Arn. Bot. Beech. 340, 4 84 
(1841). 
. (2.) Birrnerta FLORIDA (Lj; 
Calycanthus floridus L. Syst. Ed. 10, 1066 (1759). 
Calycanthus sterilis Walt. Fl. Car. 151 (1788). 
Beurera florida Kuntze, Rev. Gen. Pl. 5 (1891). 
(3.) Bévrneria rertitis (Walt.). 
Calycanthus fertilis Walt. Fl. Car. 151 (1788). 
Calycanthus ferax Michx. Fl. Bor. Am. 1: 305 (1803).. Pee 
Calycanthus nanus Loisel, in Duham. Traité des Arbres, Ed. 
2,1: 219, ¢. g8 (1801-4). 
Calycanthus glaucus Willd. Enum. 559 (1809). 
Calycanthus levigatus Willd. |. c. 
Calycanthus inodorus Ell. Bot. S. C. & Ga. 1: 576 (1821). 
Beurera fertilis Kuntze, Rev. Gen. Pl. 5 (1898). 
Beurera Serax Kuntze, Rev. Gen. Pl. 5 (1891). 
The form best known as Calycanthus levigatus is not suf- 
ficiently distinct from typical Biittneria fertilis to be maintained as 
Species. Almost every one who has seen the two forms in the — 
natural state is of this opinion. Theonly character which serves to 
distinguish them, the presence or absence of bloom on the under 
Surface of the leaf, seems to be due to the immediate influence of 
habitat. I have seen the same plant exhibiting every gradation 
from the white under-leaf surface of one form to the green surface i . 
Of the other. In so small a genus, according to a well-known 
rule, we should require exceptionally good characters for the defi- : 
nition of species. But in order that the question may be finally 
Settled, the observations of those who have an opportunity _ 
compare the two forms in the feral state, are desired. ee 
