GEOLOGY OF LA SALLE COUNTY. 



163 



erijo3^s both soil and climate. It does not spread with 

 great rapidity, but holds all that it g-ains, and should 

 be kept down. 



If any one wants to know these plants we will 

 mail specimens of the five to any address for 15 cents, 

 or furnish them at our room for 12 cents. 



The whole weed famil}^ and here we include in 

 this term every plant g^rowing- in our fields, which has 

 no known use, should be much more carefully looked 

 after than they usually are, for the material w^hich 

 they take from the soil is so much taken from that 

 which should g-o to nourish the plants which we culti- 

 vate, and slovenly farming- is g-enerally poor economy. 

 The farmers' aim should be to grow the largfest possi- 

 ble crop on the least possible area, instead of g'oing* 

 over the larg-est possible tract and leaving- the crop 

 ver}^ much to itself. It is in this direction that we be- 

 lieve the salvation of ag-riculture lies, for this should 

 g-ive us the g-reatest product at the least expense. 



The following- addendae is a list of plants omitted 

 in Part I, to which our attention has been called by 

 Mr. C. F. Johnson and Prof. h. H. Boltwood. De- 

 scriptions are g-iven where thought important. This 

 list contains fift^^-five species and varieties, making the 

 whole number recorded, not counting lichens, mosses: 

 Mosses are fungi, about 1,090; lichens, 135; mosses, 18; 

 hepaticse, 2; fungi, 77; total, 1,322 species and varie- 

 ties. 



Clematis Viorna, 42; Clematis Viorna, tails of 

 fruit plumose of Pitcheri, hairlike. 



Anemone patens var. Nutalliana, 42; sepals, 5-7i 

 of Caroliniana, 10-20. 



Dentaria laciniata, 50; stem leaves, 3 parted. 



Sisymbrium sophia, 133; resembles S. canescens. 



Lepidium intermedium, 134. Much like Vir- 

 ginicum. 



