8 
into rang groups, marked by any positive character. For this 
reason it will be found that the order followed in the subjoined 
Syaceiy does not —— correspond with that of the Enumeration 
in the Botanical Registe 
The three first mii of the tribe, Pterostigma, Lindenbergia, 
m are so intimately —— oe by the remark- 
able disjunction of the cells of the anthers and filiform adnate con- 
nectivum that I had (Bot. Reg. ad oalés n. 1470.) considered them 
as sections of Stemodia, but a difference in habit, connected with 
the form of the calyx, may — their separation, ira the 
Pterostigma capitatum is in s easure a connecting spec 
Dodartia stands alone in habit, although the flower be so > very 
nearly ees of Mazus, a totally different lookin, t. 
us and Limnophila are also readily distinguished by their 
habit. "The former has an eee inflorescence, approaching to 
h 
the lower part of the ss Pauly immersed in water) always 
} lus aquatili : 
uaresia is (as Mr. Don informs me) a mere synonym. If it be 
removed from Gratiolee it would find its place next to Buddlea. 
The C. saxifragefolia, Cham. et Schlecht. has been established as 
enus under the name of Pogostoma by Schrader (Linnea 8, 
Litt. Ber. 24.) but I am unacquainted with t e plant. 
Morgania and Uvedalia are unknown to me, but are perfectly 
characterized in Brown’s Prodromus. 
Mimulus is a very natural genus, distinguished by its calyx from 
all t Uvedalia and Torenia, and from the latter, of which 
it has sometimes the habit, by its capsule and stamina 
erpestis is readily known by the calyx, and comprines now a 
considerable number of species, chiefly from the tropical regions of 
both ae Martius (Nov. Gen. et Spec. 3. 16.) gives to 
the great mass of — es Lamarck’s name of Bramia, and reserves 
the name of Herpes tis to the single H. lanigera, characterized by a 
curious process arising from the disk, and surroundi ling the ovarium. 
Not having seen the plant, I have had noo } 
the great reliance I should place on Dr. Martius’s judgment) of form- 
ing any opinion for myself on this character; but it would appear 
that, if this be really agood genus, it would yet be advisable to retain 
