CRITICAL NOTES ON ANTENNARIA. 323 
Michigan specimens colleeted by Mr. Farwell near Detroit 
have too many involueral bracts, and the tips of them all 
narrower; so that this may belong elsewhere. The species, 
-as to the typical plant of central Illinois, was too hastily by 
me concluded to form a part of A, decipiens, or rather, of 
what I have now named 4. fallax. 
THE GENERA PoLtycopium AND BATODENDRON. 
We have in the Eastern and Southern United States two 
groups of vacciniaceous shrubs either of which is at variance 
with all genuine Vaccinium iu two important points of floral 
structure. The corollas in both groups are campanulate, 
while in both Vaccinium and Gaylussacia they are urceolate. 
The stamens also, in these campanulate-flowered shrubs, are 
of a structure so peculiar that, on the characters of this organ 
alone, a genus might reasonably be established, were con- 
comitant characters wanting. Vaccinium and Gaylussacia 
are now everywhere admitted as distinct, yet, exclusive of the 
groups here under special notice, there is not the slightest 
difference of floral structure between the two. But these 
other shrubs depart widely from the characters of both Vac- 
cinium and Gaylussacia not only in their open-campanulate 
corollas, but in respect to their stamens, which organs are 
doubly marked by extremely long and slender anther-tubes, 
andtwo prominent horn-like projections on the back ; so that 
nothing approaching these characters is found in any other 
genera allied to Vaccinium. 
Twice in the early part of the century, botanists of first- 
class ability proposed the separation of these species from 
Vaccinium. Rafinesque in 1818, not distinguishing generic 
differences between those types represented by V. stamineum 
and V. arboreum respectively—perhaps not even knowing V. 
arboreum—proposed the V. stamineum group for a genus 
under the beautifully appropriate name of PoLycopium; 
