472 
Heritiera, Gmel. (1791) which Kuntze substitutes for Elliott's 
Lachnanthes had been used two years previously by Dryander 
(Ait. Hort. Kew. iii. 456) for a genus of the Sterculiacee. The 
older names for Dryander’s genus cited by Kuntze, such as 
Amygdalus, Burm. and Atunus, Rumpf. are pre-Linnzan. The 
next in priority appears to be Gyrotheca. 
A single species only is known: 
Gyrotheca capitata (Walt.). It is a little singular that Walter’s 
specific name has been changed into “ tinctoria”’ by all the writers 
who have quoted him, from Pursh to Kuntze. The plant is placed 
by Walter among his “Anonymo” genera, the term he uses 
when he is doubtful about the genus, but his description is so full 
that no one can doubt what is meant. 
The synonymy will stand as follows: 
Gyrotheca capitata (Walt.). 
Anonymo capitata, Walt. Fl. Car. 68 (1788). 
Dilatris Caroliniana, Lam. Ill. i. 127 (1791). 
Fleritiera Gmelini, Michx. FI. i. 21 (1803). 
_ Ddiatris tinctoria, Pursh, Fl. 30 (1814). 
Gyrotheca tinctoria Salisb. Trans. Hort. Soc. i. 327 (1812). 
Lachnanthes tinctoria FM. Sk. i. 47 (1817). 
Heritiera tinctoria (Gmel.) Kuntze, Rev. Gen. 699 (1891). 
\ 
NAIADACEE. 
Potamogeton Spirillus, Tuckerm. In Britten's Journal of Bot- 
any for October, 1893, Mr. A. Bennett, commenting upon my 
adoption of Tuckerman’s name for this species, advances the re 
opinion that it should be called P. dimorphum, Raf., on the ground 
that Rafinesque in his review of Barton’s Flora of 1815 in the 
Monthly Magazine and Critical Review of 1817 proposes this name 
in the place of P. diversifolius used by Barton for what he con- 
siders a new species, since that name had already been applied by 
Rafinesque himself to Michaux’s Ayéridus. 1 should agree to this _ | 
if we could be sure that Barton meant by his description in 1815, 
supplemented by his drawing and description in 1823, the plant 
which we now know as Spzrillus. I must differ from Mr. Bennett, 
_ however, in thinking that P. Spirillus was meant. The figure of 
_ Barton represents a plant, as Barton himself puts it, with “« sub- 
