L 96 3 
dentibus. Locus naralis ex RuJJia , vd ad Wolgam 
certe flum.cn, ad cujus litora longo itinere plantas 
inquifivit. 
Ex calyce & (lore Jacem genus eft Vaillantio , mihi 
Cyani, Cl. Linn a 0 Centaurese; quo tamen nomine 
nimis multas plantas comprehendit vir egregius, 
quam ut commoda nomina imponere iiceat. 
XVI. A Letter from the Reverend Mr. Roger 
Pickering, V. D, M. to C. Mortimer, M.D . 
Seer. R. S. concerning the Propagation and 
Culture of Mu£hrooms. 
Quantity of thofe Plants, I take the Opportunity to 
fend fome additional Obfervations to thofe printed in 
thefe TranfaLtions , N° 471- p. f 93 . 
After having repeated the Experiments, then made, 
upon Plants and Seeds of this Year, I find no Reafon 
to alter any thing there mentioned, either as to the La- 
mella or Chives on the concave Side of the Umbella> 
being the Siliqtia or Seed-velfels ; or the Seeds falling 
from thence to a Lodgement wifely prepared for it 
on the middle of the Caulis , and from thence eafily 
Aiding to the Earth contiguous to the Mother-Plant; 
or as to its Propagation by fibrous Runners, or Sto - 
tones, like Potatoes; all which, I am perfuaded. 
Deptford, April 19. 1744- 
Dear Sir , 
HE late Rains having thrown up 
upon my Mufhroom Beds a great 
thefe 
