1. Neophytes such as velvetleaf (Abutilon theophrasti), thorn apple (Datura stramonium), Canadian fleabane (Conyza canadenzis), and apple of fern (Nicandra physalodes) have been particularly conspicuous.

2. Data on reproductive and vegetative weights of individuals from five species of agricultural weeds (Apera spica-venti L., Datura stramonium L., Abutilon theophrasti Medic., Sorghum halepense (L.)