OF DENISON UNIVERSITY. 7 



A List of the Worst Weeds. 



In pastures — Cnicus lanceolatus Hoffin., Thistle. Vernonia altissi- 

 ma Nutt., Iron-weed. VerbeTna urticaefolia L. , 

 White Vervain. Verbena hastata L., Blue Ver- 

 vain. Verbascum Thapsus L., Common Mul- 

 lein. Daucus Carota L,, Carrot. (In places. ) 



In lawns — Plantago major L., Common Plantain. Plantago lanceo- 

 lataL., English Plantain. Nepeta Glechoma Benth., 

 Ground Ivy. 



In meadows — rErigeron , annuus Pers., Fleabane. Erigeron strigosus 

 Muhl. Daisy Fleabane. Erigeron Philadelphicus 

 L., Common Fleabane. Rudbeckia hirta L., 

 "Brown Eyed Susans." Chrysanthemum Lencan- 

 themum L., Ox Eye DaiSy, (in places). 



In gardens — Portulaca oleracea L. , Purslane. Abutilon Avicennae 



Gaertn. Velvet Leaf. Datura Stramoniurri L. 



Jamestown- weed. Datura Fatula L., Purple 



, Jamestown-weed. Rumex crispusL. , Curled Dock. 



In cultivated grounds — ^Convolvulus sepium L. var.' Americanus 

 Sims. Lychnis Githago Lam., Corn COckle. 

 Verbascum Blattaria L., Moth Mullein. 

 Dipsacus sylvestris Mill. Wild Teasel. Pastinaca Sativa. L. , Pars- 

 nip. , Heracleum lanatum Mich-x., Cow Parsnip. Melilotus alba 



I,am., Sweet Clover. Sisymbrium officinale Scop., Hedge Mustard. 



Brassica nigra Koch. , Black Mustard Arctium Lappa L., Burdock. 



Urlica gracilis Art., Nettle, are the most troublesome in fence corners 



and moist situations. 



Times of Flowering. 



A record has been kept for the last three years of the plants 

 which bloom late in the fall and early in the spring. The large per 

 cent, of introduced species which blossom in the fall is noticeable, 

 while the early spring plants are generally native. 



The following figures are fairly accurate for the number which 

 bloom in the vicinity of Gianville: 



In November, 44 species, 17 native, 27 introduced. 



" December, ii " z " 9 " 



" January, 14 " 8 " 6 



" February. 9 " 7 " 2 " 



" March, 17 " 14 " , 3 



