7 
setpanktile caiiaenie between the Sosen.of Calas eel Baki 
— which had at first escaped my attention. In both the 
ose 
expan . In, Collinsia. this is reall 
in Schizanthus the pedicel is twist e flower i 
and in relation to the parts of the flower the stamina are in 
ding and enclosed in the carinate upper lip. e nto nce 
of these two genera still remains therefore to be decide 
The Digitalez, consisting of five well-known genes are re chiefly 
distinguished from Gratioleze by the filaments of the h 
immediately above their insertion are bent ate although 
they usually are afterwards curved up, so as that the anthers are 
ae under the upper uP 4 of the corolla, The capsule is also 
splendid drawings. Russelia is at once separated from Pentstemon 
by the absence of the fifth sterile stamen. Between Chelone oud 
-entstemon emi neertainty, some authors 
ing as Chelone “all the species with hirsute anthers, and as ye tste- 
mon those in which they are glabrous; others depending on the 
form of the corolla only ; others again combining that consideration 
with the presence or absence of the membranous wing round the 
seed. I have followed the latter opinion, referring to Thelone the 
old C. glabra, sack and Lyoni, and, as a somewhat anonialous 
species, the C. nemorosa (Dougl. in Bot. Reg. 14, t. 1211), and 
= Pentstemon ne es emaining species, about 25 in number, in- 
PB. centranthifolium (Chelone centranthifolia, Benth. 
Pa Hort. Trans. 2d Ser. 1. p. 481.) and P. cordifolium,* a New 
ug) 
We now come to the aicinns tribe of Gratiolee, embracing a 
dried specimens. Indeed, in many cases, the obliquity is so slight 
that the divisions of the corolla are apparently equal to each other, 
in which case the didynamy of the stamina alone distinguishes the 
Gratioleze fromthe Buddleize and Veroniceee. 
Gratiolew are, in the above-mentioned paper, distributed according 
to — artificial characters. The genera themselves are most o 
m natural, but I have not as yet succeeded in collecting them 
Ba pondifalinm, caule pruinoso, foliis breviter ag noua obtusis 
i , panic rollis_tubulosis 
jroheeds prsesase Be labio superiore emarginato, trie i testes terili 
barbato, antheris gl 
