with Mr. Kunth in the propriety of removing it from 
Bartsia to Castilleja, notwithstanding the difference in the 
calyx of C. integri-folia and C. fissa, and of the plant before 
us. At least it can never be admitted into any genus of 
which Bartsia Alpina and. viscosa form a part. It is curious 
that Mr. Nuttall, who divides Bartsia coccinea from Bartsia, 
for the purpose of making it into a particular genus which 
he calls Euchroma, should not have discovered that B. pal- 
lida was separable on the same grounds as the first species. 
Euchroma, however, can scarcely be divided from Castilleja. 
Upon comparing the plant which grew in the Horticul- 
tural Society’s garden, with wild specimens from Hudson’s 
Bav and Labrador, in the Banksium Herbarium, we find 
that there is no difference whatever between them even in 
size. Not so, however, with the B. pallida of Siberia. 
Of this we possess fine specimens gathered in the Ural 
Mountains by one of Dr. Fischer's collectors; and we 
find it is quite distinct from the American plant. The 
principal part of the foliage is radical and extremely nar- 
row, the whole plant is covered with dense tomentum, the 
spikes are in all cdses unbranched, and the calyx is, espe- 
cially upon the nerves, quite villous. In Castilleja sep- 
tentrionalis scarcely any of the foliage is radical ; the leaves 
are much broader, especially the upper ones, and there is 
scarcely any down upon the plant excepting a few weak 
hairs upon the upper part of the stem, the bractez, and 
calyx. 
The Bartsia pallida of Siberia may therefore be thus 
characterised, and named : 
Castilleja sibirica ; annua? foliis radicalibus linearibus acuminatis: superi- 
oribus ovato-lanceolatis trinervibus cauleque tomentosis, spica simplice, 
ealyce villoso bilabiato (}) corolla breviore. 
Bartsia foliis lanceolatis indivisis, floralibus incisis. Gel. sib. 3. p. 201. ¢. 42. 
B. pallida. L. sp. pl. 839. Willd. sp. pl. 3.186. 
C. septentrionalis is an annual plant, with a simple 
striated, smooth, nearly erect stem, a little hairy towards 
the end. ‘Radical /eaves scarcely any, cauline lanceolate 
smooth: the upper broader, 3-nerved. Spike panicled, 
with pale bractez, tinged with purple, imbricated, oblong, 
rounded, and 8 or 5-toothed at the end. lowers solitary — 
in the axilla of the bracts, sessile, pale green. Calyx com- 
pressed, tubular, two lipped, hairy; the upper lip bifid, 
lower 3-parted. Corolla tubular, compressed, downy ; the 
upper lip linear, erect, entire, channelled ; the Laws va 
short, 3-toothed, without glands. 
