10 
BOTANICAL EXCHANGE CLUB, 
Thymus Serpyllum and Chamcedrys. After several years 
cultivation side by side the North Yorkshire forms of these two 
plants exhibit the following characters. 
T. Serpyllum. Flowers three 
lines across when fully expanded, 
the lip a line and a half deep, 
the upper segment oblong emar- 
ginate and crenate, the lower one 
faintly marked in the throat. 
Two under teeth of calyx 
linear a line and a half long, 
exceeding the upper three which 
are triangular in shape and nar- 
rowed suddenly to an apiculus. 
Flowers mostly in a terminal 
head. 
Leaves narrower and narrowed 
more gradually the lower half 
fringed with hairs. 
T. Chamcedrys. Flowers two 
lines across when fully expanded, 
the lip barely a line deep, the 
upper segment roundish emargin- 
ate, the lower one distinctly 
marked in the throat. 
Two under teeth of calyx 
linear a line long, the upper 
three not so broad at the base as 
in the other and not so pointed. 
Flowers usually with one or 
two separated whorls. 
Leaves broader in proportion 
to their length only the haft 
fringed. 
A third form from Falcon Clints on the Durham side of the Tees, 
has the corolla and manner of growth of T. Serpyllum with linear- 
lanceolate lower calyx teeth just equalling the upper ones, the 
leaves and lowest bracts obovate-spathulate nearly twice as long as 
broad including the haft, hairy not only all along the edges but over 
the blade, and the stems densely hairy with rough hairs. 
Stachys palustri-sylvatica Schiede. Mr. Briggs sends from 
the border of a garden at Stoneybridge, Devonshire, and Mr. 
Bromwich from Beausale common in Warwickshire, examples of a 
not uncommon plant which comes about midway between typical 
S. palustris and the true S. amliyua of Smith. The leaves are 
narrower, less cordate and less deeply toothed than in this latter, 
and the stalks under half an inch long. These agree very well with 
an example marked S. amliyua from Professor Boreau. 
Riimex pratensis. Detected by the Rev. W. W. Newbould 
last summer in several stations ranging in altitude from 150 to 
upwards of 400 yards in the dales of Durham and Northumberland, 
(Teesdale, Weardale, and Allendale.) This extends the North 
limit a province beyond what is stated in the Cybele, and some of 
the localities come decidedly within the Superagrarian Zone. 
Surrey Chenopodia. Mr. Watson sends us this year, as he 
did last, a series of packets of Surrey Chenopodia with which he 
writes “ The Chenopodia from Surrey are sent in continuation of a 
former series. The packets include various forms of C. rulrum and 
C. urbicum or intermedium. In the Flora of Surrey a dwarf 
