138 PITTONIA. 
17. C. TURRITOIDES, Lam. Encycl. ii. 716. Erysimum 
cheiranthoides, Linn. Sp. 661; perhaps also Cheiranthus erysi- 
moides, Linn. l. c., so accepted by Hudson, Fl. Angl 2 ed. 
287, and again intimated as probable by Lamarck. 1. c. C. 
muralis, Berhn. fide Steudel. Cheirinia cheiranthoides, Link, 
Enum. Berol. ii. 170. — £rysimastrum cheiranthus, Trautv. in 
Act. Hort. Petrop. viii. 105. 
Few if any other plant-species have a more perplexed 
post-Linnzan synonymy than this; and not the least of the 
bibliographical difficulties of the situation grows out of the 
question as to whether Linnz;us had not the same species, 
upon the same page, under two distinct binary names; ap- 
pending it as kind of suffix to his absurd Erysimum, and 
forthwith placing it as the type of hisown genus Cheiranthus. 
In view of all the possibilities, I shall be deemed pardonable 
for not having here added to the synonymy. The species, 
with its full history and bibliography, would form an ex- 
cellent subject for a learned thesis, the working out of 
which wouid give insight into the intricacies of bibliography 
and synonymy, and into the ineompetency of Linnzus to 
be an authority in the matter of plant genera. 
i 
STENOPHRAGMA VIRGATUM. Sisymbrium virgatum, Nutt. 
in T. & G. Fl. i. 93. Ihave made repeated field examina- 
tions of this plant on its native soil in Wyoming, and have 
found it easily congeneric with the type of Stenophragma. 
The siliques, though described by Nuttall as “somewhat 
terete,” are, in their full maturity, even more distinctly quad- 
rangular than are those of S. Thaliana. The septum itself 
is also narrower, and has about the same reticulation. 
